Chair, Theoretical Astrophysics Program
"Pluto, the Kuiper belt and the early history of the solar system"
(SETI Institute, July 2015)
"A few points on the dynamical evolution of the young solar system"
(AAS-DDA Meeting, April-May 2014)
"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)