Petrified trees reveal Yellowstone geyser's ongoing battle with drought

Yellowstone's Steamboat Geyser has had decades-long dry spells brought on by a history of droughts, a new study finds. With global temperatures on the rise, the American West is projected to become drier. Sustained drought in this region could slow down, and possibly halt, Yellowstone National Park's famous geyser eruptions, the researchers say.