ScienceDaily: Top Science News |
- Tropical collapse in Early Triassic caused by lethal heat: Extreme temperatures blamed for 'Dead Zone'
- Germs in space: Preventing infection on long flights
- Prehistoric human populations prospered before the agricultural boom, research suggests
- Reprogrammed amniotic fluid cells could treat vascular diseases
- Genes and immune system shaped by childhood poverty, stress
- Avoiding future stock market crashes: 'Diversification effect' that protects portfolio of shares disappears during general slump
- Dinosaur-era acoustics: Global warming may give oceans the 'sound' of the Cretaceous
| Posted: 18 Oct 2012 11:18 AM PDT Scientists have discovered why the 'broken world' following the worst extinction of all time lasted so long -- it was simply too hot to survive. The end-Permian mass extinction, which occurred around 250 million years ago in the pre-dinosaur era, wiped out nearly all the world's species. Typically, a mass extinction is followed by a 'dead zone' during which new species are not seen for tens of thousands of years. In this case, the dead zone, during the Early Triassic period which followed, lasted for a perplexingly long period: five million years.  |
| Germs in space: Preventing infection on long flights Posted: 18 Oct 2012 10:09 AM PDT On a long spaceflight unique conditions including microgravity could give microbes the upper hand, but not if astronauts and their spacecrafts are properly prepared. Infectious disease experts have come up with specific recommendations for keeping astronauts safe in deeper space.  |
| Prehistoric human populations prospered before the agricultural boom, research suggests Posted: 18 Oct 2012 10:08 AM PDT Researchers have found major prehistoric human population expansions may have begun before the Neolithic period, which probably led to the introduction of agriculture.  |
| Reprogrammed amniotic fluid cells could treat vascular diseases Posted: 18 Oct 2012 09:33 AM PDT Scientists have discovered a way to utilize diagnostic prenatal amniocentesis cells, reprogramming them into abundant and stable endothelial cells capable of regenerating damaged blood vessels and repairing injured organs.  |
| Genes and immune system shaped by childhood poverty, stress Posted: 18 Oct 2012 09:30 AM PDT New research has revealed that childhood poverty, stress as an adult, and demographics such as age, sex and ethnicity, all leave an imprint on a person's genes. And, that this imprint could play a role in our immune response.  |
| Posted: 18 Oct 2012 07:30 AM PDT A 72-year study of the Dow Jones could help avoid the kind of stock market crash that struck the world economy in 2008. New research reveals that the 'diversification effect' that protects a portfolio of shares through the vagaries of the stock market disappears when there is a general slump in the market.  |
| Dinosaur-era acoustics: Global warming may give oceans the 'sound' of the Cretaceous Posted: 18 Oct 2012 07:29 AM PDT Global temperatures directly affect the acidity of the ocean, which in turn changes the acoustical properties of sea water. New research suggests that global warming may give Earth's oceans the same hi-fi sound qualities they had more than 100 million years ago, during the Age of the Dinosaurs.  |
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