In this handout photo provided by the International Mammoth Committee in Russia on Oct. 5, 2012, the carcass of a 16-year-old mammoth that was possibly killed by humans tens of thousands of years ago and was excavated on the North Siberian Taimyr peninsula on Sept. 28, 2012. Russian scientists say it's one of the best-preserved bodies of a grown mammoth yet found. (Associated Press/Sergei Gorbunov, International Mammoth Committee in Russia)

Photo by: Sergei Gorbunov

In this handout photo provided by the International Mammoth Committee in Russia on Oct. 5, 2012, the carcass of a 16-year-old mammoth that was possibly killed by humans tens of thousands of years ago and was excavated on the North Siberian Taimyr peninsula on Sept. 28, 2012. Russian scientists say it's one of the best-preserved bodies of a grown mammoth yet found. (Associated Press/Sergei Gorbunov, International Mammoth Committee in Russia)