Colloquia: Hawaii (8/96), Colgate (11/98), Penn St (3/99), Potsdam (7/01), UMass (1/02), Illinois (2/02), Texas (2/02), Arizona (2/02), Columbia (2/02), Santa Barbara (2/02), Penn (2/02), San Diego (3/02), Victoria (3/02), Colorado (11/03), STScI (3/05), TAP (3/05), NYU (10/05), Harvard (3/06), NRAO (4/06), MPIA (6/06), IfA (3/07), Leiden (6/07), AIP (6/07), MPIA (6/07), Case (11/07), Columbia (2/08), Florida (4/08), Cambridge (6/08), Durham (7/08), Maryland (4/09), MPE (6/09)

Invited Reviews Talks:
``Halo Fountains and the Circumgalactic Baryon Budget" (Sydney 11/09)
``Chemistry and kinematics of DLAs" (Leiden 5/09)
``Simulations of Galaxy Formation Including Outflows" (Trieste 10/08)
``Outflows, in Theory" (Irvine 4/08)
``Massive Galaxy Growth at High Redshift" (Tucson 6/06)
``Formation and Evolution of Galaxies" (Santa Fe 7/05)
``Modeling Galaxy Formation" (Marseilles 6/05)
``Simulations of Early Galaxy Formation" (Irvine 5/05)
``Simulations of Galaxy Formation" (Ringberg 3/05)
``The Warm-Hot Intergalactic Medium" (KITP 11/04)
``The IGM: Where the Baryons Are" (IAU 7/03)
``Cosmology Using Supercomputers" (AMNH 6/01)
``The Low Redshift Ly-alpha Forest" (OCIW 3/01)

Public Lectures:
"Numerical Cosmology" (Cleveland Museum of Natural History 11/07)
"Numerical Cosmology" (Sierra Vista Astro Club 2/04)
"Simulations of Cosmology and Galaxy Formation" (UA Monday Evening Lecture 11/03)
"Cosmology and Galaxy Formation" (U. South Pacific, Fiji 8/03)