Mammoths, mastodons and elephants are all cousins. They all appeared around the same time, but for some reason 10,000 years ago mammoths and mastadons went extinct. Scientists don’t know why they disappeared. The two leading theories are global warming or over hunting by humans. It is hoped that by studying mammoths and mastodons and why they went extinct a way can be found to help elephants who are endangered. This is a very informative, interesting and well-researched read.