Pakicetus is the "missing link" or intermediate species fossil between land animals and modern whales and dolphins. Google is a search engine that even children know how to use to find things on the web. I'm not surprised that both are mysteries to you.
What is a some people on here? They exercise "courage" to talk down to people they would never have in real life? I went to search engine and read about the discovered bones. Bones are something left behind one an animal dies, decays last. Behind is what you you kiss!