Killer whales are big whales that like to live together in groups called pods. In this lesson, you'll understand how to identify a killer whale and...
the animal sleeps with half of the brain and keeps the other half conscious. During unihemispheric slow-wave sleep, the whale also closes the eye on the side opposite the side of the sleeping brain.
Of course, we have known well that killer whales continually skirt the edge of the floes and that they would undoubtedly snap up anyone who was unfortunate enough to fall into the water; but the facts that they could display such deliberate cunning, that they were able to break ice of such...