Note from planetary scientist Pascal Lee with regard to an announcement made yesterday at NASA headquarters regarding a possible origin for gullies observed on Mars. "The spacecraft data discussed by Phil Christensen is new and beautiful, but the interpretation of the martian gullies as resulting from the melting of snow and ice patches in response to obliquity (tilt) variations of Mars on timescales of 100,000 years or so is something my colleagues and I have proposed and published for the past three years. Our model was proposed on the basis of terrestrial analog field studies we have conducted on Devon...