From an American hero and dedicated scientist: A compelling introduction to the changes taking place in Earth's climate, written for the audience that matters most to our planet's future.
Watch as a boy makes map of his room to show his friend the location of the supplies he'll need to care of the boy's hamster while the family goes on vacation.
The molten rock just under Earth's solid crust sometimes erupts suddenly and violently, causing streams of red-hot lava and scorching high-speed avalanches called pyroclastic flows.
