Chair, Theoretical Astrophysics Program
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"The Early History of the Solar System"
"Asymmetric impacts of near-Earth asteroids on the Moon"
(AAS-DPS Meeting, Oct 2009)
(LPL Evening Lecture, Sep 2009)
"Speculating on additional planets and debris in the OGLE-2006-BLG-109L system"
(AAS Meeting, June 2009)
"On the importance of a few dwarf planets"
(AAS Meeting, June 2009, public talk)