Watch Mount St. Helens Giving Birth to 'Baby Volcano'
Tuesday, May 17, 2016 - 12:50
in Earth & Climate
The 1980 eruption was the most violent in U.S. history, and time-lapse footage shows that the volcano remains active.
The 1980 eruption was the most violent in U.S. history, and time-lapse footage shows that the volcano remains active.