Thursday, May 13, 2010 - 12:00am
Silver Tells a Volatile Story of Earth’s Origin
Tiny variations in the isotopic composition of silver in meteorites and Earth rocks are helping scientists put together a timetable of how our planet was assembled beginning 4.568 billion years ago. The new study, published in the journal Science, indicates that water and other key volatiles may have been present in at least some of Earth’s original building blocks, rather than acquired later from comets, as some scientists have suggested.
Friday, August 3, 2012 - 10:06am
Supernova progenitor found?
Type Ia supernovae are violent stellar explosions. Observations of their brightness are used to determine distances in the universe and have shown scientists that the universe is expanding at an accelerating rate. But there is still too little known about the specifics of the processes by which these supernovae form. New research led by Carnegie identifies a star, prior to explosion, which will possibly become a type Ia supernova.
Wednesday, December 19, 2012 - 12:08pm
Closest Sun-like star may have planets
An international team of scientists, including Carnegie’s Paul Butler, has discovered that Tau Ceti, one of the closest and most Sun-like stars, may have five planets. At a distance of twelve light years and visible with a naked eye in the evening sky, Tau Ceti is the closest single star with the same spectral classification as our Sun. Its five planets are estimated to have masses between two and six times the mass of the Earth--making it the lowest-mass planetary system yet detected.
Tuesday, November 11, 2014 - 2:53pm
Tail discovered on long-known asteroid
A two-person team of Carnegie's Scott Sheppard and Chadwick Trujillo of the Gemini Observatory has discovered a new active asteroid, called 62412, in the Solar System's main asteroid belt between Mars and Jupiter. It is the first comet-like object seen in the Hygiea family of asteroids. Active asteroids are a newly recognized phenomenon. 62412 is only the 13th known active asteroid in the main asteroid belt. Sheppard and Trujillo estimate that there are likely about 100 of them in the main asteroid belt, based on their discovery.
Wednesday, October 10, 2007 - 1:43pm
Senior Trustee William T. Golden Dies at 97
Senior trustee William T. Golden died on Sunday October 7 at the age of 97. Bill Golden was an icon of American science policy, and the Carnegie Institution was privileged to have his support and guidance for more than 35 years.
Tuesday, April 15, 2014 - 5:09pm
Drought hormones measured
Floods and droughts are increasingly in the news, and climate experts say their frequency will only go up in the future. As such, it is crucial for scientists to learn more about how these extreme events affect plants in order to prepare for and combat the risks to food security that could result. New work from Carnegie will allow researchers, for the first time, to measure the levels of a plant hormone involved in responses to drought stress in individual plant cells in real time.
Wednesday, June 10, 2009 - 10:03am
Surprise: Typhoons Trigger Slow Earthquakes
Scientists have made the surprising finding that typhoons trigger slow earthquakes, at least in eastern Taiwan. Slow earthquakes are non-violent fault slippage events that take hours or days instead of a few brutal seconds to minutes to release their potent energy. The researchers discuss their data in a study published in the June 11, issue of Nature.
Wednesday, August 11, 2010 - 5:08am
Arctic Rocks Offer New Glimpse of Primitive Earth
Scientists have discovered a new window into the Earth's violent past. Geochemical evidence from volcanic rocks collected on Baffin Island in the Canadian Arctic suggests that beneath it lies a region of the Earth's mantle that has largely escaped the billions of years of melting and geological churning that has affected the rest of the planet. Researchers believe the discovery offers clues to the early chemical evolution of the Earth.
Friday, December 19, 2008 - 1:35pm
Carnegie Wins Grant to Preserve Historic Photos
The Carnegie Institution has been awarded a $9,400 grant from the Center for History of Physics, American Institute of Physics, to preserve and enhance access to a collection of historic photographs of scientific instruments and apparatus in the archives of the Department of Terrestrial Magnetism (DTM). The collection spans five decades from 1904 to the 1950s and includes thousands of images important to the history of geophysics, atomic physics, and astronomy.
Wednesday, April 17, 2013 - 10:29am
Reproductive tract secretions elicit ovulation
Eggs take a long time to produce in the ovary, and thus are one of a body’s precious resources. It has been theorized that the body has mechanisms to help the ovary ensure that ovulated eggs enter the reproductive tract at the right time in order to maximize the chance of successful fertilization. New research from Carnegie's Allan Spradling and Jianjun Sun has shed light on how successful ovulation and fertilization are brought about by studying these processes in fruit flies. They found that secretions from special glands within the fruit fly’s reproductive tract contribute to both ovulation and sperm function, and that this secretion is controlled by a specific hormone receptor gene, called Hr39. Their results suggest that Lrh-1, a mammalian receptor gene closely related to Hr39, also regulates ovulation by controlling reproductive tract secretions in mammals.
Tuesday, July 26, 2011 - 3:41pm
Reforestation’s Cooling Influence--A Result of Farmers' Past Choices
Decisions by farmers to plant on productive land with little snow enhances the potential for reforestation to counteract global warming, concludes new research from Carnegie’s Julia Pongratz and Ken Caldeira. Previous research has led scientists and politicians to believe that regrowing forests on Northern lands that were cleared in order to grow crops would not decrease global warming. But these studies did not consider the importance of the choices made by farmers in the historical past.
Thursday, February 13, 2014 - 1:00am
News briefing: Global warming’s record-setting pace
The pace of global warming over the last century has been about twice as rapid over land than over the oceans and will continue to be more dramatic going forward if emissions are not curbed. According to an analysis of 27 climate models by Carnegie’s Chris Field, if we continue along the current emissions trajectory, we are likely facing the most rapid large climate change in the last 65 million years. This will clearly pose great challenges for a variety of terrestrial ecosystems.
Monday, October 29, 2007 - 8:01am
Mellon Awards Carnegie Grant for Ecological Monitoring in South Africa
The Andrew W. Mellon Foundation awarded a $750,000 grant to the Carnegie Institution’s Department of Global Ecology for an intensive pilot study of ecosystem diversity in South Africa’s Kruger National Park. This research will contribute to the park’s “adaptive management” program, which uses science to improve the chances that the park’s ecosystems, including their complex vegetative and animal populations, are sustained into the future.
Thursday, August 12, 2010 - 9:55am
Asteroid Found in Gravitational “Dead Zone”
There are places in space where the gravitational tug between a planet and the Sun balance out, allowing other smaller bodies to remain stable called Lagrangian points. So-called Trojan asteroids have been found in some of these stable spots near Jupiter and Neptune. Now Scott Sheppard at the Carnegie’s Department of Terrestrial Magnetism and Chad Trujillo have discovered the first Trojan asteroid in a difficult-to-detect stability region at Neptune—the Lagrangian L5 point.
Monday, September 24, 2007 - 12:00am
Scientists discover how cancer may take hold
A team, led by researchers at the Carnegie Institution, has found a key biochemical cycle that suppresses the immune response, thereby allowing cancer cells to multiply unabated. The research shows how the biomolecules responsible for healthy T-cells, the body’s first defenders against hostile invaders, are quashed, permitting the invading cancer to spread. The same cycle could also be involved in autoimmune diseases such as multiple sclerosis.
Thursday, March 2, 2006 - 12:01pm
Wesley T. Huntress Congressional Testimony
Carnegie Institution Geophysical Laboratory director Wesley T. Huntress expressed concerns about the future of America’s Earth and space science in testimony before Congress...
Tuesday, April 4, 2006 - 12:01pm
Gene mutation causes lethally low-fat diet
Researchers from the Carnegie Institution and the University of Pennsylvania have found a specific gene malfunction that could be responsible for diseases that limit the ability to absorb lipids...
Wednesday, July 23, 2008 - 9:53am
DTM’s Richard Carlson to Receive 2008 N. L. Bowen Award from AGU
Carnegie geochemist Richard Carlson will receive the 2008 Norman L. Bowen Award from the American Geophysical Union. Named in honor of pioneering experimental petrologist and long-time Geophysical Laboratory staff member Norman Bowen, the award is given annually for outstanding contributions to volcanology, geochemistry or petrology.
Monday, July 28, 2014 - 10:49am
Carnegie wishes laser inventor happy 99th birthday
Nobel laureate and trustee emeritus Charles Townes is celebrating his 99th birthday on Monday, July 28. Townes joined the Carnegie board in 1965, one year after he shared the Nobel Prize in Physics with Alexander Prokhorov and Nikolai Basov for the development of the maser, acronym for microwave amplification by stimulated emission of radiation, and its better-known optical counterpart, the laser.