WHALES

How are things boys? I hope well despite the surprise exam...

By the way, have you ever seen a whale for yourself? I´d like to. They must be impressive. If you have the chance to see them, don´t forget the following description.

 

           Whales are mammals which live in the sea all their life. They come from an animal with four extremities and many scientists believe that the origin of those was about 60 million years ago.

            Probably, the biggest animal that has ever lived on Earth is the blue whale. It can weigh more than 200 tons and measure up to 30.5 metres long. The body is covered with fat to maintain a good temperature and store energy. Also, they have two holes in the head to breathe.

            Finally, as a cool fact, whales only send blood to important parts of the body while standing lots of metres down the sea; therefore, they avoid damage other parts due to the lack of oxigen -I think this happens in humans too otherwise, how can we explain some people´s behaviour?