* Did a modern-day scourge save ancient Earth?:
A gas blamed for global warming may once have helped
Earth escape a deep freeze, some scientists propose.

http://www.world-science.net/othernews/081130_snowball


* Canada skyburst attributed to 10-ton rock:
Researchers have been collecting witness reports and
data on a giant flash in the skies over western
Canada Nov. 20.

http://www.world-science.net/othernews/081128_asteroid


* Oceans acidifying much faster than was 
thought: study
The process could pose a threat to some ocean life,
scientists argue.

http://www.world-science.net/othernews/081126_acid


* Needy amoebae reach out to "family":
When in distress, some single-celled creatures seek
the support of kin, researchers say.

http://www.world-science.net/othernews/081124_amoebae


* Microbes may help fossilize ancient embryos:
Bacterial decay was once viewed as the mortal enemy
of fossilization, but a new study suggests otherwise.

http://www.world-science.net/othernews/081124_biofilms


* Vast underground glaciers reported on Mars:
The findings could present new avenues for the
search for life or provide water to support future
exploration, scientists claim.

http://www.world-science.net/othernews/081120_mars



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