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) ~4 c8 }; U5 `# qCOVER A young polar bear (Ursus maritimus) on a piece of ice
4 \; y. ~3 J+ q7 n6 k# o. l# E0 Hthat is drifting in the Barents Sea, northeast of Svalbard, Norway. Polar bears - E1 r8 n8 C$ q
depend on sea ice as a platform for hunting seals, but current melting and
' \! J( a2 o: H9 C5 Wretreat of sea ice is increasingly forcing them onto land. A recent study has # @' j9 q: n ~5 d
found polar bears to be evolutionarily older and genetically more distinct than
& `4 Z) M0 r0 A/ n/ kwas previously thought. See page 344. Photo: - z% s" [" q* E. e& v |
Florian Schulz, www.visionsofthewild.com / Q* J" Y8 D7 z8 e3 y2 v
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发表于 2012-4-21 14:05
发表于 2012-4-21 16:27
