Did the Earth’s lost moon create the Lunar Highlands?

http://arstechnica.com/science/news/2011/08/did-the-earths-lost-moon-create-the-lunar-highlands.ars

I just finished reading Andrew Chaikin’s A Man on the Moon and I have found a new appreciation for the moon through the stories of the Apollo missions. This Ars Technica find is merely an extension of that interest and new-found reverence. Awesome!