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Sunday, November 9, 2014

ScienceDaily: Top Science News

ScienceDaily: Top Science News

Mars spacecraft, including MAVEN, reveal comet flyby effects on Martian atmosphere

Posted: 07 Nov 2014 12:47 PM PST

Two NASA and one European spacecraft have gathered new information about the basic properties of a wayward comet that buzzed by Mars Oct. 19, directly detecting its effects on the Martian atmosphere. Debris from the comet, known officially as Comet C/2013 A1 Siding Spring, caused an intense meteor shower and added a new layer of ions, or charged particles, to the ionosphere.

New Zealand's moa were exterminated by an extremely low-density human population

Posted: 07 Nov 2014 06:16 AM PST

A new study suggests that the flightless birds named moa were completely extinct by the time New Zealand's human population had grown to two and half thousand people at most.

The power of the power nap: Scientists uncover secrets of hibernation

Posted: 07 Nov 2014 06:14 AM PST

For hibernating mammals, the pre-winter months are a race against time to accumulate enough energy reserves to last until spring. Offspring born late in the year have much less time to achieve this. Scientists have now discovered that power-napping can help late-born garden dormice overcome these unfavorable odds. The scientists also found a link between time spent at higher temperatures and aging.

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