ScienceDaily: Top Science News |
- Do missing Jupiters mean massive comet belts?
- Thawing of permafrost expected to cause significant additional global warming, not yet accounted for in climate predictions
- First evidence of ocean acidification affecting live marine creatures in the Southern Ocean
| Do missing Jupiters mean massive comet belts? Posted: 27 Nov 2012 08:12 AM PST Astronomers have discovered vast comet belts surrounding two nearby planetary systems known to host only Earth-to-Neptune-mass worlds. The comet reservoirs could have delivered life-giving oceans to the innermost planets. |
| Posted: 27 Nov 2012 06:42 AM PST Permafrost covering almost a quarter of the northern hemisphere contains 1,700 gigatonnes of carbon, twice that currently in the atmosphere, and could significantly amplify global warming should thawing accelerate as expected, according to a new report. Warming permafrost can also radically change ecosystems and cause costly infrastructural damage due to increasingly unstable ground, the report says. |
| First evidence of ocean acidification affecting live marine creatures in the Southern Ocean Posted: 26 Nov 2012 08:09 AM PST The shells of marine snails -- known as pteropods -- living in the seas around Antarctica are being dissolved by ocean acidification, according to a new study. These tiny animals are a valuable food source for fish and birds and play an important role in the oceanic carbon cycle. |
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