Guatemala

	The effectiveness of modern tree-cutting technology became clear to archaeologist Tom Sever in the late 1980s. NASA and the National Geographic Society hired him to study the potential impact of a hydroelectric dam on the Usumacinta River in Guatemala. ....read more
	The eruption of Santa Maria volcano (Guatemala) in 1902 was one of the largest eruptions of the 20th century, forming a large crater on the mountain’s southwest flank. Since 1922, a lava-dome complex, Santiaguito, has been forming in the 1902 crater.... ....read more