"A long time has passed since the world was born, and periods of order have alternated with periods of chaos." - Mencius, 3B:9
CV (June 2007) (32KB pdf)
ID picture (20KB jpg)
Rate of volcanism on massive Earth-like planets.
With Michael Manga (Berkeley) and Eric Gaidos (U. Hawaii)
In preparation.
True polar wander driven by late-stage volcanism and the distribution of paleopolar deposits on Mars.
With Isamu Matsuyama (Carnegie), Michael Manga (Berkeley), Taylor Perron (Harvard), and Jerry Mitrovica (Toronto).
In review. (Abstract)
Did ice streams shape the largest channels on Mars? (246KB pdf) With Richard Hindmarsh (British Antarctic Survey).
Geophysical Research Letters, 3 October 2007.(AGU article with full-resolution figures)
Candidate mud volcanoes in the northern plains of Mars (43KB pdf) With Niels Hovius (Cambridge), John Hillier (Cambridge), & Jonathan Besserer (Nantes).
Text-only version. Presented at the European Mars Science and Exploration Conference, November 2007, and AGU Fall Meeting, December 2007
Poster hosted at sci.esa.int (17MB pdf)
Massive Earths: modelling challenge, extraterrestrial diamond anvil, long-lived habitat? (1.6MB pdf)
Huppert Prize 2006, winning essay
Palaeo-ice streams in the Equatorial Transition Zone, Mars (9MB poster)
19th UCL Astronomy Colloquium, July 2006. Powerpoint available on request.
Jupiter exploration: high risks and high rewards (112KB pdf)
EOS, Transactions of the American Geophysical Union, 14 December 2004 (extended version)
Review of "Life's Solution" by Simon Conway Morris
Competing hypotheses for the Northwestern Slope Valleys, Mars (372KB pdf)
Figures for this poster
Text-only version published in European Space Agency Special Publication 545, Proc. 3rd European Workshop on Exo/Astrobiology, Madrid, Spain. (2004)