As far as we can tell, the earth is the only planet in the solar system where life exists. It is home to around 1.7 million known species, all kinds of plants and animals ...and over 6 billion people. But before people appeared on the scene, what was here? Even the Earth itself did not always exist! And when it first appeared, it looked nothing like the Earth you know ...Life: Step-by-Step covers all aspects of life on Earth - from the Big Bang to evolution and reproduction, cosmology, biology, geology and ecology. The illustrations are full of humour. The Step-by-Step series teaches children about the world - one step at a time.

Some shelf wear and fading.