For decades, scientists have estimated that the Siberian unicorn -- a long-extinct species of mammal that looked more like a rhino than a horse -- died out some 350,000 years ago, but a beautifully preserved skull found in Kazakhstan has completely overturned that assumption.
For decades, scientists have estimated that the Siberian unicorn -- a long-extinct species of mammal that looked more like a rhino than a horse -- died out some 350,000 years ago, but a beautifully preserved skull found in Kazakhstan has completely overturned that assumption.
