《科学》[Science]12年4月20日出版pdf全文

nero1981

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COVER A young polar bear (Ursus maritimus) on a piece of ice
; [; L: Q5 M/ fthat is drifting in the Barents Sea, northeast of Svalbard, Norway. Polar bears
5 b, R1 R9 Q6 D% Ddepend on sea ice as a platform for hunting seals, but current melting and , a2 N. v  }2 ]
retreat of sea ice is increasingly forcing them onto land. A recent study has 0 s! A, l8 k9 |7 U
found polar bears to be evolutionarily older and genetically more distinct than
9 V' b% c( R$ ?2 xwas previously thought. See page 344. Photo:
- U3 \+ j( b5 Z1 o9 u! H0 zFlorian Schulz, www.visionsofthewild.com ' c/ h7 g9 g; E
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懵懂干细胞

谢谢分享！ 楼主辛苦了

linlicau

谢谢分享。

lgclgc

thank you very much

tpwang

回复 nero1981 的帖子) c$ o/ v; _* ]  ?$ k' Z/ U. k+ T
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thanks

eley

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zorro

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军医

谢谢回复

埋名埋姓

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lcxlorna

谢谢！