The ocean depth is something you and me can't observe on a daily basis, even though it has so many curious things! For example, how do ocean animals sleep? They don't have comfy places to sleep on, do they? By observing the whales, scientists discovered that these mammals only sleep for about 10-15 minutes a day. And they don't move or breathe at that time.
Animation is created by Bright Side Date: 2022-04-19
