MailOnline
By Eddie Wrenn
Polar bears are capable of swimming vast
distances, with one endurance swimmer travelling 220 miles in a non-stop
marathon over 10 days.
The bears were tracked as part of a study,
published in the Canadian Journal of Zoology, which tracked 52 female polar
bears in the southern Beaufort Sea off Alaska.
Between 2004 and 2009, a period of extreme
summer-ice retreat, about a third of those bears made swims exceeding 30 miles in
distance.
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