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- 积分
- 17983
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- 17983
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- 26159
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5 L! K8 x6 ^% A8 ]COVER A young polar bear (Ursus maritimus) on a piece of ice
) e- C# B+ k& Z# c7 H& [; |* f0 rthat is drifting in the Barents Sea, northeast of Svalbard, Norway. Polar bears
; G6 x& ]$ I8 \6 W- Tdepend on sea ice as a platform for hunting seals, but current melting and 4 o. y+ [. u% j8 H
retreat of sea ice is increasingly forcing them onto land. A recent study has 1 [3 c" d- R8 ?) z7 l
found polar bears to be evolutionarily older and genetically more distinct than + m* W6 N8 l5 K3 _: R
was previously thought. See page 344. Photo:
& X. l: P) ~5 Z3 [: ]Florian Schulz, www.visionsofthewild.com
7 {; ?+ N h3 E5 s! h[hide][/hide] |
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发表于 2012-4-21 14:05
发表于 2012-4-21 16:27
