I think Kottke (who else?) originally pointed to this a few months ago, but I only just got around to reading it. If sentences such as:

Back to the Hadean. As befits its name, this was a time when the Earth was hellishly hot. It began with an event that formed the Moon around 4.53 billion years ago. What made the moon? The current most popular explanation is the “giant impact theory” — sometimes called the “Big Splat” theory.

excite your interest, I recommend clicking. It’s really good – especially the bit about the formation of the Moon.