About 178 species including the woolly mammoth and the saber-toothed cat disappeared tens of thousand of years ago. What brought about their demise?
How did animals respond to the ice age? Ancient bison preserved in the Canadian arctic have given scientists a clue.
Why did rainforests evolve so much more diversity than other parts of the globe?
Are you familiar with the La Brea Tar Pits? Learn more on this Moment of Science.
During the current ice age glaciers have advanced and retreated over twenty times. We’re living during one of the warmer periods when the glaciers have retreated.