ScienceDaily: Top Science News |
- NASA's WISE colors in unknowns on Jupiter asteroids
- Evolution mostly driven by brawn, not brains, analysis finds
- Tropical cyclones are occurring more frequently than before, study shows
- Neuroscientists find the molecular 'when' and 'where' of memory formation
- Circumbinary planet in quadruple star system discovered by astronomers aided by volunteer 'Planet Hunters'
- Climate change: Circulation of Atlantic Ocean was faster during last Ice Age than today
- Primates in peril: Conservationists reveal the world's 25 most endangered primates
- Early-Earth cells modeled to show how first life forms might have packaged RNA
| NASA's WISE colors in unknowns on Jupiter asteroids Posted: 15 Oct 2012 01:35 PM PDT Scientists using data from NASA's Wide-field Infrared Survey Explorer, or WISE, have uncovered new clues in the ongoing mystery of the Jovian Trojans -- asteroids that orbit the sun on the same path as Jupiter. Like racehorses, the asteroids travel in packs, with one group leading the way in front of the gas giant, and a second group trailing behind. The observations are the first to get a detailed look at the Trojans' colors: both the leading and trailing packs are made up of predominantly dark, reddish rocks with a matte, non-reflecting surface. What's more, the data verify the previous suspicion that the leading pack of Trojans outnumbers the trailing bunch. |
| Evolution mostly driven by brawn, not brains, analysis finds Posted: 15 Oct 2012 12:20 PM PDT The most common measure of intelligence in animals, brain size relative to body size, may not be as dependent on evolutionary selection on the brain as previously thought, according to a new analysis by scientists. |
| Tropical cyclones are occurring more frequently than before, study shows Posted: 15 Oct 2012 12:20 PM PDT Are there more tropical cyclones now than in the past -- or is it just something we believe because we now hear more about them through media coverage and are better able detect them with satellites? New research shows that there is an increasing tendency for cyclones when the climate is warmer, as it has been in recent years. |
| Neuroscientists find the molecular 'when' and 'where' of memory formation Posted: 15 Oct 2012 12:11 PM PDT Neuroscientists have isolated the "when" and "where" of molecular activity that occurs in the formation of short-, intermediate-, and long-term memories. Their findings offer new insights into the molecular architecture of memory formation and, with it, a better road map for developing therapeutic interventions for related afflictions. |
| Posted: 15 Oct 2012 12:00 PM PDT A joint effort of citizen scientists and professional astronomers has led to the first reported case of a planet orbiting twin suns that in turn is orbited by a second distant pair of stars. Only six planets are known to orbit two stars, according to researchers, and none of these are orbited by distant stellar companions. |
| Climate change: Circulation of Atlantic Ocean was faster during last Ice Age than today Posted: 15 Oct 2012 09:19 AM PDT Heat transport in the Atlantic Ocean during the last Ice Age was not weaker, as long assumed, but in fact stronger than it is today. Scientists used ultra-precise measurements of natural radionuclides in ocean sediments to study the ocean's strength of circulation and uncovered new information about the past of the "Atlantic heat pump." |
| Primates in peril: Conservationists reveal the world's 25 most endangered primates Posted: 15 Oct 2012 08:08 AM PDT Humankind's closest living relatives -- the world's apes, monkeys, lemurs and other primates -- are on the brink of extinction and in need of urgent conservation measures, according to a report released by the International Union for Conservation of Nature (IUCN). The report, announced by some of the world's leading primate experts every two years, reveals those species most in danger of becoming extinct from destruction of tropical forests, illegal wildlife trade and commercial bush meat hunting. |
| Early-Earth cells modeled to show how first life forms might have packaged RNA Posted: 14 Oct 2012 01:29 PM PDT A chemical model that mimics a possible step in the formation of cellular life on Earth four-billion years ago has been developed. Chemists created primitive cell-like structures that they infused with RNA -- the genetic coding material that is thought to precede the appearance of DNA on Earth -- and demonstrated how the molecules would react chemically under conditions that might have been present on the early Earth. |
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