Beginning nearly five billion years ago, there is no sign of our beautiful blue planet in the solar system.
(03:01)A young planet called Theia heads straight for the Earth twenty times faster than a bullet.
(02:59)When big amounts of heat escape from the Earth’s molten core, the activity spawns loads of volcanoes.
(03:01)Life in the oceans is blossoming, from microscopic bacteria to huge sea monsters such as the Anomolacaris.
(02:47)Dinosaurs survived volcanic eruptions and earthquakes. But nothing on the planet is invincible.
(03:09)The Story of Earth promo, a two-hour special on National Geographic Channel.
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