From birds to flowers, the majority of the Earth’s species stem from a few evolutionary “explosions,” where new habitats or traits sparked rapid diversification. These bursts, in fact, explain m

Bison, pronghorn and elk amble across Yellowstone’s grasslands. Aspens and willows speckle the forests of pine, spruce, fir and juniper, which shelter grizzlies, black bears, coyotes and gray wolves