Watch after 1:50 and you will see the whale wake up. Whales typically sleep at night, which makes this a rare encounter — though other remarkable footage has been captured of sperm whales napping too, and as a group, no less. Unlike humans and other non-aquatic mammals, respiration is not involuntary for whales and dolphins. In order to keep from drowning as they sleep, these animals shut off half their brain at a time, allowing them to return to the surface periodically to breathe. youtube/watch?v=jOamfKwr6aU#t=119
Posted on: Thu, 16 Oct 2014 08:59:31 +0000
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