Impact cratering is one of the few processes affecting all planetary bodies. Records can provide clues for contrasting geologic evolutions. The planetary record, lab experiments, field studies, and theoretical approaches allow exploring a process at scales we hope we never witness. My main research has been on the effect of impact angle on cratering and the role of the atmosphere in modifying the process. Different planetary environments, laboratory simulations, and theoretical models allow testing under extreme conditions and to extreme scales.
I received my Ph.D. in Astronomy at the University of Texas at Austin in 1972. After working as a research associate at the NASA Ames Research Center, and a Staff Scientist at The Lunar and Planetary Institute, I became an Associate Professor in the Department of Geological Sciences at Brown University in 1984. I was promoted to full Professor in 1994. In addition to my research and teaching responsibilities at Brown, I have served as Director of the Lunar and Planetary Institute Planetary Image Facility, and am currently the Director for both the Northeast Planetary Data Center and the NASA/Rhode Island University Space Grant Consortium.
On The Web:
Peru Meteorite May Rewrite Rules
"Deep Impact": Cometary Ice?
Lunar Activity from Recent Gas Release
Creature Features: Fossil Hunting on Mars
Meteorites: How big is safe?
Structural geology: The buried record of Chicxulub
Carancas meteor fall uncovered
LCROSS Rocket to the Moon
Water Found on Moon, Researchers Say
'Significant Amount' of Water Found on Moon
ASX's 7th Annual "Expanding Canada's Frontiers" Symposium
Was life founded on cyanide from space crashes?
Brown scientists had bird's eye view of moon impact
Look for "Flood" of News This Week About Water on the Moon
Brown's Planetary Geosciences Group
More about my research...
A Productive Collision
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