BBC's series Earth: One Planet, Many Lives hosted by Chris Peckham relates the amazing history of our planet. One episode recounts how the entire planet froze, including the equator, after a period of warm temperatures and another episode reveals how the planet became barren rock after having been covered with trees and other vegetation. The first episode explains how scientists think almost all marine life and seventy per cent of land vertebrates died 252 million years ago.
Enormous volcanic eruptions spanning two million years precipitated this mass extinction event, creating a 'line of death' in rock formations around the world. Following this fiery spectacle, intermittent intensive rains for almost two million years enabled life to recover and provided the conditions for the arrival of the dinosaurs. The total number of living creatures today accounts for less than one per cent of all those that have ever existed on Earth.
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