Animation of erupting volcanoes, lava flows and storms on the primordial Earth. The Moon is seen in
the sky. At this early stage, the Moon was far closer to Earth than it is now. During the Archaean
epoch of the Earth's past, between 2.5-4 billion years ago, volcanic activity was much more
pronounced, and the atmosphere lacked oxygen and was much richer in greenhouse gases. This kept the
surface warm enough for some liquid water, despite the Sun only emitting some 70% of its current
energy output. Despite these hellish conditions, life began on Earth during the Archaean Eon.
Early Earth - V5