What if the moon had never formed?
Credit: Karl Tate / Life’s Little Mysteries
Huge tides generated by the moon – which orbited much closer to Earth when it formed – washed the chemical building blocks for life from land into the oceans and helped stir up the primordial soup. Without it, life may never have arisen, or living things would have very different behavioral patterns to cope with the six-hour day and extreme climate changes that would exist on a moonless Earth. [Get the full explanation]