It should be known I am trying to sleep right now, sitting down, with no success:)
In: Biology
Some animals are able to find a place to hide and sleep (like a burrow or den). Others are big enough to not worry about most predators.
Animals like birds, dolphins or whales let half their brain sleep. The rest of the brain keeps going, then the parts of the brain sleep wake up and the other parts go to sleep.
Latest Answers