Whales Evolution

Here some info about Whales Evolution.

Records indicate changes in the whales took years until today the mammals, its huge tail and dive out of sight, only to surface again to the delight of the camera ready tourists whale watching. Scientists know that whales are mammals whose ancestors went to the earth once. The next life with respect to the whales are deer, cows, sheep, pigs, giraffes, camels and hippos.

Wal has 15 million years, in order of creatures, the earth moved to the largest mammals in the ocean.
The development of the limbs, teeth, kidneys and other organs to the changing water pressure is another phenomenon of nature. Cetaceans, even to change their ears to hear and see the direction of the sound. The process will echo location is the way whales, hunt and survive.
Scientists to determine that all mammals live in the country must breathe air from the surface, the bones of their fins seem to be articulated in the hands of land mammals and the vertical movement of the spikes should be similar to the implementation of the mammals that horizontal movement of the fish. Fossils of whales all these features of land living mammals.

The pigs from India, Indohyus, is the relative shortness of the actual whales and dolphins. Fossils, by Hans Thewissen of the Northeastern University in Ohio, shows the relationship between whales and the deer-like ancestors.

Fossil skeleton shows leg bones were very thick, like hippos, sea otters and manatees. They ended the heavier bones of mammals swim float by default and allows you to hang up and diving into the water easier. You can now with manatees in Florida waters.
The changes reflected in fossil studies suggest that there was a movement to the water. This is a change of diet, the whales from land to sea. Scientists believe that whales were fleeing from predators. The whales are carnivorous aquatic delicacies.

Whales have no tear glands, skin glands and olfactory sense. The whales can hear, but it has no external ear opening. All whales have a series of small muscles that there is no external support ears. This shows that if the whales are able to their ears, like animals, the land for directional hearing. Modern whales hear through vibrations.

Paleontological could change in the shape of the skull, the shape of the teeth, the position of the nose, the size and structure of the anterior and posterior limbs, the size and shape of the tail and the structure of the middle ear. All these changes have been made by fossil evidence and explain in detail the adaptation of the whale's life on earth to make life in the sea.