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Rank: Advanced Member
Joined: 3/7/2009
Posts: 6,888
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Location: Inside Farlex computers
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 Polar Bear Origins Fairly RecentA mitochondrial DNA analysis of a rare fossil jaw found in Norway suggests that polar bears evolved from brown bears only about 150,000 years ago. Previous estimates of polar bear evolution had dated the divergence to anywhere from 70,000 years ago to more than one million years ago. At the time that polar bears emerged, Earth was in the final stages of an ice age and was beginning to warm. These dramatic environmental changes may have led to the polar bear's relatively rapid evolution. More...
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Rank: Advanced Member
Joined: 9/10/2009
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Location: United States
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Another Theory: Polar bears are simply hungry Koala bears. We all know, "Your not you when you're hungry." And Snickers can solve that problem...That's my story and I'm sticking to it. Does anyone have a napkin?
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Rank: Advanced Member
Joined: 12/27/2009
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Location: UK
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"Polar Bears" - An endanger specie.
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Rank: Advanced Member
Joined: 9/2/2009
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Location: United States
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Sure, sure, but what is the difference between the white and the brown, beside the color? Naturally, this is only a theory which is not going to alter my breathing. Some how, I felt less of a man because I did not that yesterday.. 
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Rank: Advanced Member
Joined: 3/17/2009
Posts: 1,503
Points: 4,487
Location: United States
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Hupomone wrote:Another Theory: Polar bears are simply hungry Koala bears. We all know, "Your not you when you're hungry." And Snickers can solve that problem...That's my story and I'm sticking to it. Does anyone have a napkin? I realize your statement is not a serious one, Hupomone, but I still would like to point out that koalas are not actually bears at all but instead marsupials.
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Rank: Advanced Member
Joined: 7/26/2009
Posts: 461
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Location: Beyond the Impossible
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Carmelo wrote:Sure, sure, but what is the difference between the white and the brown, beside the color? Enough that neither could survive for long in the other's habitat. The most important difference is insulation: polar bears are astonishingly good at retaining heat.
Currently Reading: Nothing but textbooks Currently Watching: Tengen Toppa Gurren Lagann (again)
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