“Less than we thought,” researchers say in a new study providing insights into the distribution of biodiversity across the globe.
The temperate forests of Canada or Northern Europe may have much more in common with the tropical rainforests of Southeast Asia or South America than previously believed, according to a research group including a University of Arizona ecologist.
The assertion, published as the cover article in the journal Science, is focused on the concept of “beta-diversity” – a measure of the change in species composition between two sites, such as neighboring patches of forest. High beta-diversity means that two given sites have few species in common. (more…)
*High-mountain wildflower season reduced, affecting pollinators like bees, hummingbirds*
It’s summer wildflower season in the Rocky Mountains, a time when high-peaks meadows are dotted with riotous color.
But for how long?
Once, wildflower season in montane meadow ecosystems extended throughout the summer months. But now scientists have found a fall-off in wildflowers at mid-season. (more…)
PASADENA, Calif. –– Observations from NASA’s Voyager spacecraft, humanity’s farthest deep space sentinels, suggest the edge of our solar system may not be smooth, but filled with a turbulent sea of magnetic bubbles.
While using a new computer model to analyze Voyager data, scientists found the sun’s distant magnetic field is made up of bubbles approximately 100 million miles (160 million kilometers) wide. The bubbles are created when magnetic field lines reorganize. The new model suggests the field lines are broken up into self-contained structures disconnected from the solar magnetic field. The findings are described in the June 9 edition of the Astrophysical Journal. (more…)
COLLEGE PARK, Md. – Under Osama bin Laden’s leadership, al Qa’ida has been one of the most lethal terrorist organization in the world, responsible for more than 10,000 deaths and injuries in a dozen years – finds a new analysis by the National Consortium for the Study of Terrorism and Responses to Terrorism at the University of Maryland (START).
“Al-Qa’ida, the terrorist organization Osama bin Laden founded, was responsible for fomenting more mass casualty attacks than any other group in recent history,” says START Director Gary LaFree, a University of Maryland professor responsible for assembling the world’s most comprehensive unclassified terrorism database. (more…)
COLLEGE PARK, Md. – A new University of Maryland in-depth survey of American public opinion gives a detailed picture of how the country is reacting to the major, unfolding drama in the Middle East.
Conducted in early April, the polling finds Americans overwhelmingly sympathetic to the Arab uprisings for democracy, largely see it as a positive trend and consider developments there a high U.S. priority. A majority – though a declining one – still supports airstrikes on Libya. (more…)
This season’s annual scientific balloon campaign, which is held by NSF and NASA, will conduct varied experiments using ultra-sophisticated instrumentation.
NASA and the National Science Foundation launched a scientific balloon on Monday, December 20, Eastern Standard time, to study the effects of cosmic rays on Earth. It was the first of five scientific balloons scheduled to launch from Antarctica in December.
The Cosmic Ray Energetics And Mass (CREAM VI) experiment was designed and built at the University of Maryland. CREAM is investigating high-energy cosmic-ray particles that originated from distant supernovae explosions in the Milky Way and reached Earth. Currently, CREAM VI is floating 126,000 ft above Antarctica with nominal science operations. (more…)
*Initial science results on comet released from University of Maryland, much more to come UMD scientists say.*
Jets Galore. This enhanced image, one of the closest taken of comet Hartley 2. Image credit: University of Maryland
COLLEGE PARK, Md. – One of the biggest comet findings coming out of the amazing images and data taken by the University of Maryland-ledEPOXI mission as it zipped past comet Hartley 2 last week is that dry ice is the ‘jet’ fuel for this comet and perhaps many others.
Images from the flyby show spectacular jets of gas and particles bursting from many distinct spots on the surface of the comet. This is the first time images of a comet have been sharp enough to allow scientists to link jets of dust and gas with specific surface features. Analysis of the spectral signatures of the materials coming from the jets shows primarily CO2 gas (carbon dioxide) and particles of dust and ice.
“Previously it was thought that water vapor from water ice was the propulsive force behind jets of material coming off of the body, or nucleus, of the comet,” said University of Maryland Astronomy Professor Jessica Sunshine, who is deputy principal investigator for the EPOXI mission. “We now have unambiguous evidence that solar heating of subsurface frozen carbon dioxide (dry ice), directly to a gas, a process known as sublimation, is powering the many jets of material coming from the comet. This is a finding that only could have been made by traveling to a comet, because ground based telescopes can’t detect CO2 and current space telescopes aren’t tuned to look for this gas,” Sunshine said.(more…)
COLLEGE PARK, Md — Scientists at the University of Maryland and Tulane University have developed a computational model of a swimming fish that is the first to address the interaction of both internal and external forces on locomotion. The interdisciplinary research team simulated how the fish’s flexible body bends, depending on both the forces from the fluid moving around it as well as the muscles inside. Understanding these interactions, even in fish, will help design medical prosthetics for humans that work with the body’s natural mechanics, rather than against them. This research is published in the October 18, 2010 online early edition of the Proceedings of the National Academy of Sciences. (more…)
