The Kilauea volcano is still expanding. On August 3, 2011 the newest lava flow burst forth and is seen here flowing towards the sea.
"Volcanoes remind us that we are living on a dynamic planet," O'Meara says, "a young world that is still forming under our feet each day. Kîlauea is just one jewel in the necklace of more than 1,000 volcanoes that form the Pacific Ring of Fire."
READ MORE: Could Volcanic Eruptions Slow Climate Change?
Photo credit: Steve and Donna O'Meara /National Geographic Image Collection