ScienceDaily: Top Science News |
- Space travel may be harmful to the brain, study suggests; Prolonged cosmic radiation exposure could hasten Alzheimer's
- Jellyfish experts show increased blooms are a consequence of periodic global fluctuations
- Did Lucy walk on the ground or stay in the trees?
| Posted: 31 Dec 2012 03:06 PM PST As if space travel was not already filled with enough dangers, a new study shows that cosmic radiation -- which would bombard astronauts on deep space missions to places like Mars -- could accelerate the onset of Alzheimer's disease.  |
| Jellyfish experts show increased blooms are a consequence of periodic global fluctuations Posted: 31 Dec 2012 03:06 PM PST Blooms, or proliferations, of jellyfish can show a substantial, visible impact on coastal populations -- clogged nets for fishermen, stinging waters for tourists, even choked cooling intake pipes for power plants -- and recent media reports have created a perception that the world's oceans are experiencing trending increases in jellyfish. Now, a new multinational collaborative study suggests these trends may be overstated, finding that there is no robust evidence for a global increase in jellyfish over the past two centuries.  |
| Did Lucy walk on the ground or stay in the trees? Posted: 31 Dec 2012 01:10 PM PST Researchers have investigated tree-climbing behavior of modern hunter-gatherers to elucidate our fossil ancestors' terrestrial versus arboreal preferences.  |
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