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Archive for July 23, 2011

Beavers

If there’s any species that knows how to survive a heat wave, it’s beavers! More at home in water than on land, the beaver can hold its breath for up to 15 minutes, and swim up to half a mile under water. Beavers also have valves in their nose and ears that automatically close when beavers are submerged, and transparent nictitating membranes that act as a third eyelid, covering and protecting  their  eyes under water.