following the giant ice shelf that covered the northern Atlantic during the ice age 20,000 years ago. In prehistoric North America, the short-faced bear (Arctodus simus) ruled the land.
A US biotech company has genetically modified mice to have traits from the extinct woolly mammoth. Researchers at Colossal ...
As the largest rodent ever in North America, the giant beaver also would have existed with the first people ever to settle in ...