Our earth

The planet earth is in the most favourable position in the solar system. Being the third planet away from the sun, it is neither too hot nor too cold. This is also one of the reasons why it is able to support animal life. The earth is not a round ball as everyone thinks it is. It is actually a sphere with a slightly flattened top and bottom, where the north pole and south pole are, respectively. You may find it hard to believe but the earth spins on its axis. What is an axis? It is an imaginary line that connects the north and south poles. And this is how you get night and day.