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Knut the polar bear's medical legacy

Keeping wild animals is an important component of the mission of zoos to educate the public and preserve endangered species. When animals die, tracking the potential cause becomes an investigation of pathogens from around ...

dateJan 03, 2014 in Plants & Animals
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Video: The Sun reverses its magnetic poles

This visualization shows the position of the sun's magnetic fields from January 1997 to December 2013. The field lines swarm with activity: The magenta lines show where the sun's overall field is negative and the green lines ...

dateDec 09, 2013 in Space Exploration
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