Hulleye Comes By!

On the origin of the Earth’s moon and how our planet would be different if we didn’t have a moon.

The Moon has been a stabilizing factor for the axis of rotation of the Earth. If you look at Mars, for instance, that planet has wobbled quite dramatically on its axis over time due to the gravitational influence of all the other planets in the solar system. Because of this obliquity change, the ice that is now at the poles on Mars would sometimes drift to the equator. But the Earth’s moon has helped stabilize our planet so that its axis of rotation stays in the same direction. For this reason, we had much less climatic change than if the Earth had been alone. And this has changed the way life evolved on Earth, allowing for the emergence of more complex multi-cellular organisms compared to a planet where drastic climatic change would allow only small, robust organisms to survive.

Humans are evolving faster, apparently.  To the tune of one hundred times faster in the last five thousand years than in any other timeframe in human history you care to name.  Ten thousand years ago, nobody on the planet had blue eyes.  Today, a human being can survive having internalised the dead bodies of her own triplets.