Tuesday, January 29, 2008 - 4:35pm
Magnetism loses under pressure
Scientists at the Geophysical Laboratory, with colleagues, have discovered that the magnetic strength of magnetite—the most abundant magnetic mineral on Earth—declines drastically when put under pressure.
Monday, February 27, 2012 - 4:51pm
Amoeba may offer key clue to photosynthetic evolution
The major difference between plant and animal cells is the photosynthetic process, which converts light energy into chemical energy. When light isn’t available, energy is generated by breaking down carbohydrates and sugars, just as it is in animal and some bacterial cells. Two cellular organelles are responsible for these two processes: the chloroplasts for photosynthesis and the mitochondria for sugar breakdown. New research from Carnegie’s Eva Nowack and Arthur Grossman has opened a window into the early stages of chloroplast evolution.
Wednesday, February 6, 2013 - 2:28pm
Forecasting a Supernova Explosion
Type II supernovae are formed when massive stars collapse, initiating giant explosions. It is thought that stars emit a burst of mass as a precursor to the supernova explosion. If this process were better understood, it could be used to predict and study supernova events in their earliest stages. New observations from a team of astronomers including Carnegie's Mansi Kasliwal show a remarkable mass-loss event about a month before the explosion of a type IIn supernova.
Tuesday, January 22, 2008 - 11:58am
Carnegie’s Stephen Shectman receives Jackson-Gwilt Medal
The Royal Astronomical Society has awarded Stephen Shectman of the Carnegie Observatories the 2008 Jackson-Gwilt Medal for his exceptional work in developing astronomical instrumentation and in constructing telescopes.
Friday, January 18, 2013 - 12:32pm
Studying Ancient Earth’s Geochemistry
Researchers still have much to learn about the volcanism that shaped our planet’s early history. New evidence from a team led by Carnegie’s Frances Jenner demonstrates that some of the tectonic processes driving volcanic activity, such as those taking place today, were occurring as early as 3.8 billion years ago.
Tuesday, October 19, 2010 - 11:59am
Three Carnegie Scientists Chosen Nifty Fifty Lecturers for USA Science & Engineering Festival
Carnegie biogeochemist Marilyn Fogel, developmental biologist Marnie Halpern, and astronomer Stella Kafka were selected from over 500 applicants to be USA Science & Engineering Festival “Nifty Fifty” lecturers. According to the late Nobel Laureate Richard Smalley, by the end of 2010 90% of the world's scientists and engineers will live in Asia and 80% of people trained in the advanced physical sciences in the U.S. are from abroad. This first such festival is being held in Washington, D.C., to inspire interest in science.
Monday, March 28, 2005 - 1:00am
100 Greatest Discoveries
Carnegie molecular biologist Joseph Gall discusses the work of groundbreaking microscopists, biologists, zoologists, and geneticists with Bill Nye, "The Science Guy," as The Science Channel counts down the greatest science discoveries of our time...
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.
Monday, July 29, 2013 - 3:55pm
How Does Hydrogen Metallize?
Hydrogen is deceptively simple. It has only a single electron per atom, but it powers the sun and forms the majority of the observed universe. As such, it is naturally exposed to the entire range of pressures and temperatures available in the whole cosmos. But researchers are still struggling to understand even basic aspects of its various forms under high-pressure conditions. New work from a team at Carnegie’s Geophysical Laboratory makes significant additions to our understanding of this vital element’s high-pressure behavior.
Monday, November 25, 2013 - 4:19pm
Ancient Minerals: Which Gave Rise to Life?
Life originated as a result of natural processes that exploited early Earth’s raw materials. Scientific models of life’s origins almost always look to minerals for such essential tasks as the synthesis of life’s molecular building blocks or the supply of metabolic energy. But this assumes that the mineral species found on Earth today are much the same as they were during Earth’s first 550 million years—the Hadean Eon—when life emerged. A new analysis of Hadean mineralogy challenges that assumption.
Tuesday, July 26, 2011 - 3:41pm
Reforestation’s Cooling Influence--A Result of Farmer’s 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.
Monday, March 2, 2009 - 3:01pm
Airborne Ecologists Help Balance Delicate African Ecosystem
The African savanna is world famous for its wildlife, especially the iconic large herbivores such as elephants, zebras, and giraffes. But managing these ecosystems and balancing the interests of the large charismatic mammals with those of other species has been a perpetual challenge for park and game mangers. Now a new study published in the Proceedings of the National Academy of Sciences reports the successful test of new remote-sensing technology to monitor the impact of management decisions on the savannah ecosystem.
Wednesday, August 18, 2010 - 4:37am
Roller Coaster Superconductivity Discovered
Superconductors are more efficient at carrying electricity than copper wires. But these materials have to be cooled below an extremely low, so-called transition temperature for electrical resistance to disappear. Researchers at the Carnegie’s Geophysical Laboratory, have unexpectedly found that the transition temperature can be induced under two different intense pressures in a three-layered bismuth oxide crystal. They believe this unusual two-step phenomena comes from competition of electronic behavior in different layers.
Friday, February 18, 2011 - 7:16pm
Carnegie awarded new patent for diamond creation
The U.S. Patent & Trademark Office has issued a patent to the Carnegie Institution for a method of creating high quality diamond crystals larger than 10 carats.
Monday, January 9, 2012 - 3:11pm
Mirror Casting Event for the Giant Magellan Telescope
On January 14, 2012, the second 8.4-meter (27.6 ft) diameter mirror for the Giant Magellan Telescope (GMT) will be cast inside a rotating furnace at the University of Arizona’s Steward Observatory Mirror Lab (SOML) underneath the campus football stadium. The Mirror Lab will host a special event to highlight the milestone. Members of the media are invited to visit the Mirror Lab on Saturday morning, January 14, 2012, between 9:00 and 11:00 a.m. MST.
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...
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.
Thursday, July 3, 2008 - 2:03pm
MESSENGER settles old debates and makes new discoveries at Mercury
Scientists have argued about the origins of Mercury’s smooth plains and the source of its magnetic field for over 30 years. Now, analyses of data from the January 2008 flyby of the planet by the MESSENGER spacecraft have shown that volcanoes were involved in plains formation and suggest that its magnetic field is actively produced in the planet’s core and is not a frozen relic. Scientists additionally took their first look at the chemical composition the planet’s surface material. The tiny craft probed the composition of Mercury’s thin atmosphere, sampled charged particles (ions) near the planet, and demonstrated new links between both sets of observations and materials on Mercury’s surface. The results are reported in a series of 11 papers published in a special section of Science magazine on July 4th. Carnegie’s Sean Solomon, director of the Department of Terrestrial Magnetism, is the mission’s principal investigator. For more see
Image courtesy Science/AAAS
Thursday, January 23, 2014 - 5:50pm
Are developing heart valves sensitive to environmental chemicals?
Exposure to environmental endocrine disrupters, such as bisphenol A, which mimic estrogen, is associated with adverse health effects. Bisphenol A is commonly found in plastic bottles and plastic food containers. New research on the effects of these chemicals on zebrafish shows that embryonic heart valves could be particularly in danger.
Wednesday, July 25, 2012 - 8:25am
Forest Carbon Monitoring Breakthrough in Colombia
Using new techniques, Carnegie and Colombian scientists have developed ultra-high resolution maps of the carbon stocks locked in tropical vegetation for 40% of the Colombian Amazon, an area about four times the size of Switzerland. Until now, the inability to accurately quantify carbon stocks at high spatial resolution over large areas has hindered the United Nations’ Reducing Emissions from Deforestation and Forest Degradation (REDD+) program aimed at creating a financial value for storing carbon in tropical forests.