3 conferences in 3 weeks, in 3 different cities! We actually get paid to have this much fun? We are at the Phobos-Deimos conference at NASA Ames in California. We just heard famous planetary scientist William K. Hartmann talk about theories of a late-heavy bombardment of asteroids. Evidence from Earth's Moon points to a huge storm of impacts 3.9 billion years ago. According to Hartmann, not all scientists agree. No one is sure how the Martian moons originated. Since Apollo, most have agreed that our Moon is the result of a giant impact. The answers may wait until people have visited Phobos and Deimos.