Sites

NYTimes.com - Moon's Dust Hides a Throbbing Heart (Popularity: )
http://www.nytimes.com/2002/05/14/science/space/14MOON.html
Laser-ranging measurements indicate that the moon is a bit flexible, hinting at a molten interior. [Requires free NYTimes.com registration to view.]

The UnMuseum's Ponzo and the Moon (Popularity: )
http://unmuseum.mus.pa.us/exmoon.htm
Explains why the Ponzo Illusion makes the Moon appear larger when near the horizon.