it is impossible for it to return to land. To demonstrate this, the researchers gave the example of two animals: orcas and dolphins. Bruna Farina, a scientist at the University of Freiburg ...

Scientists believe that the first animals to migrate to dry land first crawled out of the sea more than 350 million years ago. Those first intrepid adventurers gradually became accustomed to life ...

In fact, the new picture of this transition shows that most of the changes needed for life on dry land happened ... tetrapods -- four-legged animals that walked on land -- has long been of intense ...