Earth - Series 1: 4. Atmosphere - Signed

Name: Earth - Series 1: 4. Atmosphere - Signed
Description: When the Earth first formed from clouds of dust and gas, it was devoid of an atmosphere. But as the young planet is pummelled by asteroids, a period of extraordinary upheaval begins.

When the Earth first formed from clouds of dust and gas, it was devoid of an atmosphere. But as the young planet is pummelled by asteroids, a period of extraordinary upheaval begins.