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A photo of the planet Venus.

How long is a day on Venus? Scientists crack mysteries of our closest neighbor

A photo of the planet Venus.

Fundamentals such as how many hours are in a Venusian day provide critical data for understanding the divergent histories of Venus and Earth, UCLA researchers say. (Photo Credit: NASA/JPL-Caltech)

Venus is an enigma. It’s the planet next door and yet reveals little about itself. An opaque blanket of clouds smothers a harsh landscape pelted by acid rain and baked at temperatures that can liquify lead.

Now, new observations from the safety of Earth are lifting the veil on some of Venus’ most basic properties. By repeatedly bouncing radar off the planet’s surface over the last 15 years, a UCLA-led team has pinned down the precise length of a day on Venus, the tilt of its axis and the size of its core. The findings are published today in the journal Nature Astronomy.

“Venus is our sister planet, and yet these fundamental properties have remained unknown,” said Jean-Luc Margot, a UCLA professor of Earth, planetary and space sciences who led the research.

Earth and Venus have a lot in common: Both rocky planets have nearly the same size, mass and density. And yet they evolved along wildly different paths. Fundamentals such as how many hours are in a Venusian day provide critical data for understanding the divergent histories of these neighboring worlds.

Changes in Venus’ spin and orientation reveal how mass is spread out within. Knowledge of its internal structure, in turn, fuels insight into the planet’s formation, its volcanic history and how time has altered the surface. Plus, without precise data on how the planet moves, any future landing attempts could be off by as much as 30 kilometers.

“Without these measurements,” said Margot, “we’re essentially flying blind.”

The new radar measurements show that an average day on Venus lasts 243.0226 Earth days — roughly two-thirds of an Earth year. What’s more, the rotation rate of Venus is always changing: A value measured at one time will be a bit larger or smaller than a previous value. The team estimated the length of a day from each of the individual measurements, and they observed differences of at least 20 minutes.

“That probably explains why previous estimates didn’t agree with one another,” Margot said.

Venus’ heavy atmosphere is likely to blame for the variation. As it sloshes around the planet, it exchanges a lot of momentum with the solid ground, speeding up and slowing down its rotation. This happens on Earth too, but the exchange adds or subtracts just one millisecond from each day. The effect is much more dramatic on Venus because the atmosphere is roughly 93 times as massive as Earth’s, and so it has a lot more momentum to trade.

The UCLA-led team also reports that Venus tips to one side by precisely 2.6392 degrees (Earth is tilted by about 23 degrees), an improvement on the precision of previous estimates by a factor of 10. The repeated radar measurements further revealed the glacial rate at which the orientation of Venus’ spin axis changes, much like a spinning child’s top. On Earth, this “precession” takes about 26,000 years to cycle around once. Venus needs a little longer: about 29,000 years.

With these exacting measurements of how Venus spins, the team calculated that the planet’s core is about 3,500 kilometers across — quite similar to Earth — though they cannot yet deduce whether it’s liquid or solid.

Venus as a giant disco ball

On 21 separate occasions from 2006 to 2020, Margot and his colleagues aimed radio waves at Venus from the 70-meter–wide Goldstone antenna in California’s Mojave Desert. Several minutes later, those radio waves bounced off Venus and came back to Earth. The radio echo was picked up at Goldstone and at the Green Bank Observatory in West Virginia.

“We use Venus as a giant disco ball,” said Margot, with the radio dish acting like a flashlight and the planet’s landscape like millions of tiny reflectors. “We illuminate it with an extremely powerful flashlight — about 100,000 times brighter than your typical flashlight. And if we track the reflections from the disco ball, we can infer properties about the spin [state].”

Muhammad Nadeem, Jean-Luc Margot/UCLA and NASA

The complex reflections erratically brighten and dim the return signal, which sweeps across Earth. The Goldstone antenna sees the echo first, then Green Bank sees it roughly 20 seconds later. The exact delay between receipt at the two facilities provides a snapshot of how quickly Venus is spinning, while the particular window of time in which the echoes are most similar reveals the planet’s tilt.

The observations required exquisite timing to ensure that Venus and Earth were properly positioned. And both observatories had to be working perfectly — which wasn’t always the case. “We found that it’s actually challenging to get everything to work just right in a 30-second period,” Margot said. “Most of the time, we get some data. But it’s unusual that we get all the data that we’re hoping to get.”

Despite the challenges, the team is forging ahead and has turned its sights on Jupiter’s moons Europa and Ganymede. Many researchers strongly suspect that Europa, in particular, hides a liquid water ocean beneath a thick shell of ice. Ground-based radar measurements could fortify the case for an ocean and reveal the thickness of the ice shell.

And the team will continue bouncing radar off of Venus. With each radio echo, the veil over Venus lifts a little bit more, bringing our sister planet into ever sharper view.

This research was supported by NASA, the Jet Propulsion Laboratory and the National Science Foundation.

Other researchers who contributed to the study are Donald Campbell of Cornell University; Jon Giorgini, Joseph Jao and Lawrence Snedeker of the Jet Propulsion Laboratory; and Frank Ghigo and Amber Bonsall of the National Radio Astronomy Observatory in West Virginia.

This article, written by Christopher Crockett, originally appeared in the UCLA Newsroom.

A rendering of the NASA Perseverance rover as it would appear on Mars.

Q&A: David Paige on the Mars Perseverance landing

A rendering of the NASA Perseverance rover as it would appear on Mars.

Rendering of the NASA Perseverance. The rover’s RIMFAX technology will use radar waves to probe the unexplored world that lies beneath the Martian surface. (Photo Credit: NASA/JPL/Caltech/FFI)

NASA’s Perseverance rover is scheduled to land on Mars on Feb. 18 after a six-and-a-half month flight. Over the next two years, it will explore Jezero Crater, which is in Mars’ northern hemisphere, for signs of ancient life and for new clues about the planet’s climate and geology.

Among other tasks, it will collect rock and soil samples in tubes that a later spacecraft will bring back to Earth, and the experiments will lay the groundwork for future human and robotic exploration of Mars.

Perseverance, which is about the size of a car, is outfitted with seven different instruments, including the Radar Imager for Mars‘ Subsurface Experiment, or RIMFAX. RIMFAX will probe beneath the planet’s surface to study its geology in detail, and its deputy principal investigator is David Paige, a UCLA professor of planetary science.

In an email interview with UCLA Newsroom, Paige discussed his hopes for the mission. Some answers have been edited for brevity and clarity.

Why do you want to study Jezero Crater’s geologic history?

Jezero Crater is a very interesting location on Mars because it looks like there was once a lake inside the crater, and that a river flowed into the lake and deposited sediments in a delta. We plan to land near the delta and then explore it to learn more about Mars’ climate history, and maybe something about ancient Martian life. What we’ll be able to see once we start roving and what we will actually learn is anybody’s guess.

RIMFAX will provide a highly detailed view of subsurface structures and help find clues to past environments on Mars, including those that may have provided the conditions necessary for supporting life.

A photo of David Paige.

David Paige (Courtesy of David Paige)

What are you hoping to discover?

Well, the first thing to know about RIMFAX is that it’s an experiment. We’ve never tried using a ground-penetrating radar on Mars before, so we can’t really predict what types of subsurface structures we might be able to see.

But we have done some fairly extensive field testing of RIMFAX on Earth to learn how to use it and how to interpret the data. Here, ground-penetrating radars can be very useful for clarifying subsurface geology, but with any kind of imaging system, the science of ground-penetrating radar comes from the interpretation of the images, and interpretation relies on context.

Frankly, if we are able to usefully interpret anything we see in the RIMFAX data, the experiment will be a success. Any discoveries we make beyond that will be icing on the cake.

Are you hopeful of finding water, or evidence of water, beneath the planet’s surface?

There are all kinds of evidence for past liquid water all over Mars. At Jezero, there must have been a lot of water at some point, but we don’t expect that the ground beneath the rover will still be wet.

Mars today is a very cold place, and any water in the shallow subsurface should be frozen at Jezero. What we’re interested in finding are geologic features that wouldn’t be expected to form under present climatic conditions, as those would be especially interesting targets to search for signs of past life.

However, searching for past life on Mars may be very difficult, and we should not expect instant success. After all, we know the Earth was literally crawling with life, but definitive evidence for past life on Earth, especially ancient life, is very rare.

What is your role in the research? 

My role is to help plan the observations and analyze the results. Since the rover will be working on Mars time, in which the days are 24.5 hours long, responsibility for the operation of RIMFAX will pingpong between Norway and UCLA every two weeks. Having operations centers on two continents will make it easier to keep up with the mission and stay on a reasonably normal schedule.

In fact, RIMFAX was designed, paid for and built by our colleagues in Norway. I teamed up with my colleague, Svein-Erik Hamran of the University of Oslo, to propose the instrument to NASA, and it has been a rewarding experience to work with the international RIMFAX team.

Are UCLA students involved?

Yes. Mark Nasielski, a UCLA graduate student in electrical engineering, is part of our operations team. And Max Parks and Tyler Powell, graduate students in Earth, planetary and space sciences, are part of our science team.

This article, written by Stuart Wolpert, originally appeared in the UCLA Newsroom

Hosea Nelson receives award for pioneering research in organic chemistry

Hosea Nelson, an assistant professor of chemistry and biochemistry, has received the 2020 Novartis Early Career Award in organic chemistry for his scientific achievements in the field. He will receive an unrestricted research grant as part of the award.

A photo of Hosea Nelson, assistant professor of chemistry and biochemistry.

Hosea Nelson (Photo Credit: UCLA)

Nelson’s research is focused on the development of enabling technologies for chemical synthesis and biology. His research team, the Nelson Group, uses organic synthesis and organic catalyst development to develop small molecules and new methodologies that will be widely used by practitioners of medicine and biology.

Nelson earned his doctorate in 2013 from the California Institute of Technology. After postdoctoral training at UC Berkeley, he joined the UCLA faculty in 2015. In October, he received the 2020 Eli Lilly Grantee Award for organic chemistry.

Novartis, a Switzerland-based multinational pharmaceutical company, gives the Early Career Award annually to outstanding scientists within 10 years of having established an independent academic research career in the areas of organic or bioorganic chemistry.

This article originally appeared on the UCLA Newsroom

Gift from Astrid and Howard Preston will Fund Renovation of UCLA’s Remote Observing Facility

Howard and Astrid Preston in front of a painting by Astrid in the UCLA Luskin Conference Center. (Photo Credit: Reed Hutchinson)

The UCLA College’s Division of Physical Sciences has received a gift of $500,000 from alumni Astrid and Howard Preston to renovate and expand the facility that allows prominent UCLA astronomers and research scientists to observe distant galaxies and stars without leaving campus.

Galaxy: Stellar orbits. (Photo courtesy of NCSA, UCLA / Keck)

Renamed in honor of the couple, the Astrid and Howard Preston Remote Observing Facility in Knudsen Hall provides remote access to the Keck telescopes in Hawaii and the Lick telescope in Northern California, and, when completed, will also link to the Thirty Meter Telescope in Hawaii.

The division matched the Prestons’ gift at 50%, bringing the total investment to $750,000.

Dean of physical sciences Miguel García-Garibay said, “We are incredibly grateful for this generous gift, which will enhance remote observing capabilities for world-renowned research groups in our division for decades to come. It’s yet another impactful example of the Prestons’ long record of leadership and philanthropy in support of the Department of Physics & Astronomy.”

The Preston Remote Observing Facility is used by four leading astronomy UCLA research groups:

-The Galactic Center Group, led by 2020 Physics Nobel Laureate Andrea Ghez, studies the formation and evolution of galaxies and their central supermassive black holes.

-The Infrared Laboratory develops techniques and applications of infrared imaging devices for astrophysics, including infrared cameras and spectrometers for Lick Observatory, Keck Observatory, Gemini Observatory, the Thirty Meter Telescope (TMT) Observatory, and NASA’s Stratospheric Observatory for Infrared Astronomy.

– Extrasolar planets and planetary science faculty study the dynamics and physical properties of the interiors, surfaces and atmospheres of Earth, planets, moons and other solar system objects.

– Cosmology, galaxies and galaxy evolution faculty study the nature of galactic nuclei and quasars, the first generation of galaxies and the structure of the early universe.

Following the renovation project, which is due to begin later this year, the facility will comprise 750 square feet with two distinct remote observing areas equipped with state-of-the-science technology, which can open to one shared area to optimize functionality of the space. Also included in the plans are areas for video conferencing, group discussion, food preparation, and even sleeping, since most observing time is scheduled during night and early morning hours.

Ghez, who holds the Lauren B. Leichtman and Arthur E. Levine Chair in Astrophysics, said, “I can’t emphasize enough how critical the remote observing facility is to our work. It allows us convenient real-time access to precious telescope time so that we can collect the observational data that advances our research. The renovation made possible by the Prestons’ gift will not only make a huge difference to all of us who use the facility but also will facilitate the technical development of the Thirty Meter Telescope, the Keck telescopes and the Lick telescope.”

Any funds remaining after completion of the project will be used to create an endowment to cover ongoing costs related to the space, including computational analysis, future renovations and maintenance, and technology upgrades.

The Prestons have supported the Department of Physics & Astronomy for more than 20 years. They previously established the Howard and Astrid Preston Term Chair in Astrophysics and the Preston Family Graduate Fellowship in Astrophysics. Howard serves on UCLA’s Galactic Center Group Board of Advisors and Physical Sciences Entrepreneurship and Innovation Fund. Astrid is on the board of Women & Philanthropy at UCLA and the Department of English board of visitors. The couple met as UCLA undergrads in 1963. After earning a doctorate in physics, Howard founded Preston Cinema Systems, maker of high-tech camera and lens control systems for film and television. Astrid, who graduated with a B.A. in English, is an acclaimed painter.

Howard Preston said, “Astrid and I have followed the exciting progress of UCLA’s astronomy research groups for some time, and we know how important this facility is to their work. We are absolutely delighted that we can support this much-needed renovation and expansion, and we are eager to see what discoveries are around the corner.”

This article was written by Margaret MacDonald. 

A portrait of Clara Pratte.

Tribal leader Clara Pratte wins Pritzker Award for young environmental innovators

A portrait of Clara Pratte.

Clara Pratte: “There’s a Navajo saying that when there’s a world to heal, there’s going to be a mother to do it — a woman to do it.” (Photo Courtesy of Clara Pratte)

The UCLA Institute of the Environment and Sustainability presented the 2020 Pritzker Emerging Environmental Genius Award to Clara Pratte, a Navajo advocate for tribal communities and a member of President-elect Joe Biden’s transition team who focuses on tribal engagement.

Pratte advises tribes across the United States on economic development issues, with the goals of alleviating poverty and advancing tribal sovereignty. She founded Strongbow Strategies, a firm that assists tribal and government clients with business and technical issues, in 2013. She is also part of the leadership team of Navajo Power, a public benefit corporation that transitions tribal lands from extractive energy industries such as coal to large-scale solar energy.

The annual award carries a prize of $100,000, which is funded through a portion of a $20 million gift to UCLA from the Anthony and Jeanne Pritzker Family Foundation. It is the field’s first major honor specifically for innovators under the age of 40 — those whose work stands to benefit most from the prize money and the prestige it conveys.

Pratte said the award, which was presented Dec. 16 in an online ceremony, brought to mind traditional wisdom.

“There’s a Navajo saying that when there’s a world to heal, there’s going to be a mother to do it — a woman to do it,” Pratte said.

A screen shot of Pratte reacting to the announcement of her selection as the 2020 winner of the Pritzker Emerging Environmental Genius Award.

Pratte reacts to the announcement of her selection as the 2020 winner of the Pritzker Emerging Environmental Genius Award. (Photo Credit: UCLA Institute of the Environment and Sustainability)

Through her work with Navajo Power, Pratte gathers input to make sure prospective clean energy projects serve the community’s needs. In many cases, she said, companies trying to work on Native lands fail because they lack an understanding of the everyday realities facing residents. They often communicate only with tribal leadership, which may not understand the needs of each individual community. The results create injustices, such as power lines that run over homes lacking electricity. Navajo Power makes sure that’s not the case on its projects.

The company reinvests its profits in the community — reimbursing people for the use of their land and making sure every home has electricity and water.

“I was born and raised in the Navajo community with no water or electricity, thinking that the only way we could survive is to join the capitalist community we’re part of,” Pratte said. “We destigmatize and demystify what it’s like to work on tribal lands.”

The Pritzker Award is open to anyone working to solve environmental challenges through any lens — from science to advocacy and entrepreneurism. For the second straight year, the winner represents an indigenous group and, for the third consecutive year, all three finalists were women.

In addition to Pratte, the finalists were Kathy Jetñil-Kijiner, a Marshallese poet and climate activist who performed at the United Nations Climate Summit, and Leah Penniman, who co-founded a community farm centered on Black and Indigenous people that aims to end racism and injustice in the food system. A panel of UCLA faculty members selected the finalists from among 20 candidates who were nominated by an international group of environmental leaders.

Pratte was chosen as winner by a panel of four distinguished judges: Anousheh Ansari, CEO of XPrize Foundation; Kevin de León, Los Angeles City Councilmember; Lori Garver, CEO of Earthrise Alliance; and Kara Hurst, head of worldwide sustainability at Amazon.

“I don’t need to convince this crowd that climate change is an existential threat,” de León said. “We cannot solve it unless all individuals can access the latest and greatest energy technologies and live in a sustainable community.”

The announcement of Pratte as the winner was made by Tony Pritzker, who founded the award and is a member of the Institute of the Environment and Sustainability’s advisory board. He praised all of the nominees for their practical efforts during a difficult time.

“2020 obviously has been a different sort of year,” Pritzker said. “The word that I have in my mind is ‘grateful.’ I’m grateful for my health and the health of my family in a way I’ve never appreciated before. I’m grateful for your perseverance and dedication to the Earth and its various environmental needs. You’re all working toward solutions that can make this a better place to live.”

This article, written by David Colgan, originally appeared in the UCLA Newsroom

A photo of Royce Hall.

Match funds stimulate establishment of nine centennial term chairs

UCLA College donors gave gifts to establish nine endowed centennial term chairs in the final year of the Centennial Campaign, taking advantage of the opportunity to enhance the impact of their philanthropy through a $5-million dollar match fund.

A photo of Royce Hall.

The Centennial Term Chair Match Fund was set up by Dean of Physical Sciences Miguel García-Garibay using proceeds of UCLA’s sale of royalty interest in the prostate cancer drug Xtandi, which was developed by chemists in the UCLA College’s physical sciences division. The fund was intended to bolster efforts to hire and retain early-career faculty through the establishment of faculty term chairs. Centennial chair holders also will form a distinct cohort that brings College faculty together and advises the College deans on various initiatives.

Senior Dean of UCLA College David Schaberg said, “By ‘sharing the wealth’ through the match fund, Dean García-Garibay found an innovative way to spur investment in faculty throughout the College and engage donors who share our commitment to faculty excellence.”

Prestigious endowed chairs play a key role in recruiting and retaining premier faculty whose interdisciplinary research, commitment to mentoring students, and talent for teaching are essential to the university’s vitality and impact. UCLA vies with other top-tier universities, including many with much larger endowments, for the best faculty. Along with the prestige and recognition that come with an endowed chair, chair holders receive funds for research costs as well to support graduate students who teach and mentor undergraduates. Term chairs, while renewable, generally are awarded every five years to ensure representation of a cross-section of academic fields.

Below are the nine centennial term chairs established or committed:

Division of Humanities

– Theresa McShane Biggs and Henry P. Biggs Centennial Term Chair in Linguistics

– George P. Kolovos Family Centennial Term Chair in Hellenic Studies

 

Division of Life Sciences

– George and Nouhad Ayoub Centennial Chair in Life Sciences Innovation

– Kevin Love Fund Centennial Chair in Psychology*

 

Division of Physical Sciences

– Randy Schekman and Sabeeha Merchant Centennial Term Chair

– The Andrea M. Ghez Centennial Term Chair in Astronomy and Astrophysics (gifts from Astrid and Howard Preston, Lauren Leichtman and Arthur Levine, and the Heising-Simons Foundation)

 

Division of Social Sciences

– Benjamin Graham Centennial Endowed Chair in Value Investing (gift from the Havner Family Foundation)

– Mark Itkin Centennial Chair in Communication honoring Andrea L. Rich* (gift from Mark Allen Itkin)

 

Division of Undergraduate Education

– Centennial Director for Philanthropy Education (gift from Madeline and Mark Asofsky)

 

*Pending approval by UCOP

This article was written by Margaret MacDonald. 

A photo of flood waters caused by Tropical Storm Erin in Kingfisher, Oklahoma, in August 2007.

Extreme rainfall projected to get more severe, frequent with warming

A photo of flood waters caused by Tropical Storm Erin in Kingfisher, Oklahoma, in August 2007.

Flood waters caused by Tropical Storm Erin in Kingfisher, Oklahoma, in August 2007. (Photo Credit: Marvin Nauman/FEMA)

Across the continental United States, massive, often-devastating precipitation events — the kind that climate scientists have long called “hundred-year storms” — could become three times more likely and 20% more severe by 2079, UCLA-led research projects.

That’s what would happen in a scenario in which greenhouse gas emissions continue to increase at a rapid rate — what the paper calls a high-warming scenario. Extreme rainfall events, the so-called hundred-year storms, would then be likely to occur once every 33 years.

The paper, published in the American Geophysical Union journal Earth’s Future, finds that warming has a more profound effect on both the severity and frequency of extreme precipitation events than it does on common precipitation events.

The findings have serious implications for how we prepare for the future, UCLA climate scientist Daniel Swain said.

“The five-year flood, the 10-year flood — those aren’t the ones that cause huge amounts of damage and societal disruption,” said Swain, who is also a fellow with the Nature Conservancy. “That comes when you get 50- or 100-year floods, the low-probability but high-consequence kinds of events.”

For example, the occurrence of historic rainfall events such as the one that caused California’s Great Flood of 1862 or Houston’s flooding from Hurricane Harvey in 2017 is increasing much faster than that of lower-magnitude events that happen every decade or so.

The paper predicts extreme precipitation increases for the entire continental United States, but some areas are expected to see bigger relative increases than others, including the West Coast and the hurricane-prone Southeast.

The paper also delves into the consequences of those extreme rainfall events: the increases in the number of floods and the number of people who would be exposed to them.

Combining climate, water physics and population models, the paper also projects that, in a high-warming scenario, the increases in extreme precipitation alone would put up to 12 million additional people at risk of exposure to damage and destruction from catastrophic flooding —  29.5% more people than face that risk today.

The paper also made projections using other scenarios that combine the effects of warming and projected population growth. For example, high warming juxtaposed with high population growth would increase the number of people exposed to risk of so-called 100-year floods by around 50 million in the continental U.S.

And even in the absence of climate change — at least some of which is unavoidable over the next 30 years — medium or large population growth would expose an additional 20 million or 34 million, respectively, to such floods, highlighting the importance of demographic factors in driving the growing risk.

Combining the factors would compound the changes in some regions that have so far been outside of flood zones and are sparsely populated because, thanks to climate change and population growth, those areas are likely to be within flood plains and have higher population density in the future. That “hot spot effect” could put up to 5.5 million more people at risk of devastating floods than warming or population growth alone would.

“There’s a huge difference between best- and worst-case scenarios,” Swain said. “People’s exposure to flooding in a warming climate is definitely going to increase. It could increase by a somewhat manageable amount or by a truly massive amount, and that depends both on the climate trajectory we take and on the demographics of the U.S.”

Previously, projections for extreme precipitation events relied on limited historical records that go back only 100 years. For the new study, the researchers used a modeling technique to create multiple plausible pasts and futures, essentially increasing the amount of available data by 40 times over what was available from history alone.

“We don’t just have one 100-year event we can pull from the historical record; we have lots of really severe, rare events we can pull out to give us a better sense of how they’re likely to change,” said Swain, who is a member of the UCLA Institute of the Environment and Sustainability.

Importantly, the authors write, the risk of flooding in the U.S. will increase significantly over the next 30 years, even with moderate warming — meaning a temperature increase of 1.5 to 2.5 degrees Celsius (2.7 to 4.5 degrees Fahrenheit) globally. That would expose more than 20 million additional people to a 100-year flood within the next 30 years, they projected.

Even the term “100-year flood” is probably already something of a misnomer, Swain said. With global temperatures already having increased by about 1.2 degrees Celsius (about 2.1 degrees Fahrenheit) over the past century, the term is fast becoming outdated.

James Done, a co-author of the paper and a climate scientist at the National Center for Atmospheric Research, said further work is required to understand exactly why extreme events are increasing more rapidly than less extreme ones.

“It’s not just because of a shift in the distribution of the flooding,” Done said. “There’s something else that’s reshaping the most extreme of the very dangerous rainfall events.”

The precipitation changes predicted are already beginning, he added. And the nation’s infrastructure — from flood control channels to concrete-heavy urban design that drains slowly — were not designed for the scenarios that now seem likely to occur.

This article, written by David Colgan, originally appeared in the UCLA Newsroom.

Chemical biologist receives award for development of imaging technology

Ellen Sletten, assistant professor of chemistry and biochemistry at UCLA, has been selected as one of four recipients of the 2020 International Chemical Biology Society Young Chemical Biologist Award. The award is given annually to young scientists across the globe who have made significant research and service contributions to chemical biology.

A photo of Ellen Sletten.

Ellen Sletten (Photo Credit: UCLA)

Sletten is being recognized for her development of fluorophore technology that allows for multicolor, real-time imaging in mice, facilitating the translation of optical chemical tools to mammals. She is the first UCLA faculty member to receive the award since its inception in 2013. Sletten received her award and gave a lecture on “Multicolor, High Resolution, Non-invasive Imaging in Mice” during a special “Rising Stars” session at the ICBS 2020 Virtual Conference.

A UCLA faculty member since 2015, Sletten is the John McTague Career Development Professor of Chemistry and Biochemistry. She is a 2019 ACS Polymeric Materials: Science and Engineering Young Investigator, 2018 Sloan Research Fellow, UCLA Hellman Fellow and NIH Director’s New Innovator.

Sletten’s research group takes a mutidisciplinary approach to the development of molecules, methods and materials to detect and perform chemistries in vivo, ultimately enabling next-generation therapeutics and diagnostics. To learn more about Sletten’s research, visit the Sletten Group website.

This article, written by Stuart Wolpert, originally appeared in the UCLA Newsroom

A photo of Rong Fu, Karen Sears and Graciela Gelmini.

Three professors named 2020 fellows of the American Association for the Advancement of Science

A photo of Rong Fu, Karen Sears and Graciela Gelmini.

From left: Rong Fu, Karen Sears and Graciela Gelmini were named fellows of the American Association for the Advancement of Science. (Courtesy of Karen Sears, Rong Fu and Graciela Gelmini)

The American Association for the Advancement of Science, which is the world’s largest scientific society, named three UCLA College faculty members as 2020 fellows. Since 1874, the AAAS, which publishes the journal Science, has chosen members for their distinguished efforts to advance science or its applications.

UCLA College’s new fellows are:

Rong Fu, professor and vice chair of atmospheric and oceanic sciences, conducts research on the role of the atmospheric hydrological cycle and its interaction with Earth’s surface in determining the stability of the Earth’s climate at global and regional scales, and applying climate science to support regional decision-making. Her research has focused on topics including the mechanisms that control the rainfall variability over Amazonian and Pan-American monsoon regions and various factors that influence rainfall variability in the recent past and will influence rainfall and droughts in the future. She is being honored for “seminal contributions to the understanding of rainfall and ecosystem interactions, and the scientific application for improving societal drought preparedness at regional scale.”

Graciela Gelmini, professor of physics and astronomy, conducts research on astro-particle physics, especially dark matter. The vast majority of the matter in the universe is dark matter, which so far has been observed only through its gravitational interaction. What dark matter consists of remains one of the most important open questions in physics, astrophysics and cosmology. She is a theoretical physicist who has extensively studied dark matter candidates, as well as the physics of neutrinos. She is being honored for her outstanding contributions “to our understanding of dark matter and the universe.”

Karen Sears, professor and chair of the ecology and evolutionary biology department, harnesses the diversity in mammals to study how evolution works. Her research explores the developmental rules that shape evolution and provide insights into human health. She is being honored for distinguished contributions to biology, “particularly the developmental mechanisms driving morphologic diversification in mammals.”

A total of to 489 scholars were selected as fellows this year. They will be honored Feb. 13, 2021, at a virtual Fellows Forum.

For the full article, written by Stuart Wolpert, please visit the UCLA Newsroom

A photo of Andrea Ghez receiving her Nobel Prize citation and medal.

Andrea Ghez delivers Nobel Lecture, receives Nobel medal

A photo of Andrea Ghez receiving her Nobel Prize citation and medal.

Ghez received her Nobel Prize citation and medal on Dec. 9 in Beverly Hills. (Photo Credit: Annette Buhl)

Editor’s note: This news release was updated Dec. 10 with a new headline and photographs covering the presentation of the Nobel medal. The video of her medal ceremony was added Dec. 11.

“How do you observe something you can’t see?”

Andrea Ghez, who in October won the 2020 Nobel Prize in physics, answers that question and many others in her Nobel Lecture.

Ghez, UCLA’s Lauren B. Leichtman and Arthur E. Levine Professor of Astrophysics and director of the UCLA Galactic Center Group, shared the prize for her discovery of a supermassive black hole at the center of our galaxy, where the distorting effects of the Earth’s atmosphere made it difficult to see much of anything.

In the talk, Ghez discusses the research she conducted at the W.M. Keck Observatory in Hawaii, which houses the world’s largest telescopes. She also recounts a huge leap forward she made in the 1990s, when she helped to pioneer adaptive optics, a powerful technology that corrects the distorting effects of the Earth’s atmosphere in real time.

Due to the COVID-19 pandemic, Ghez delivered her lecture in a mostly empty Lani Hall at UCLA. (Photo Credit: UCLA Broadcast Studio/Nobel Prize Outreach)

And she shares the story of how her initial proposal to conduct the research that led to the Nobel Prize was turned down. “People didn’t think it would work,” she recalled. Ghez wrote another proposal to better explain that it would work.

Her lecture, titled “From the Possibility to the Certainty of a Supermassive Black Hole,” was delivered in UCLA’s Lani Hall. Due to the COVID-19 pandemic, the auditorium was mostly empty at the time. Traditionally, Nobel laureates travel to Stockholm — or Oslo, Norway, in the case of the Peace Prize — to receive their awards. This year, because of the pandemic, their medals are being brought to them.

Ghez received her Nobel diploma and medal Dec. 9 in the backyard of Leichtman and Levine’s home in Beverly Hills. Today, she will participate in a “Nobel Minds” discussion that will stream live on the organization’s website at 12:35 p.m. PST, and she will be interviewed about her research for a Nobel Prize podcast.

Andrea Ghez with Lars-Erik Tindre, representing the Swedish embassy in Washington, D.C., at the presentation of Ghez’s Nobel medal in Beverly Hills on Dec. 9. (Photo Credit: Annette Buhl)

Ghez and fellow Nobel laureate Jennifer Doudna, a UC Berkeley professor of biochemistry, were joined by UCLA Executive Vice Chancellor and Provost Emily Carter for a webinar on Dec. 16 at 9 a.m. PST. They discussed the science behind their Nobel-winning discoveries, their current research and the significance of their Nobel Prizes for women and young aspiring scientists.

You can view the webinar on the UCLA Connections website.

Doudna shared the 2020 Nobel Prize in chemistry for her role in the development of CRISPR-Cas9, a powerful genome editing breakthrough that allows scientists to rewrite DNA in any organism, including human cells.

This article, written by Stuart Wolpert, originally appeared in the UCLA Newsroom