May 13–May 19, 2008
Show that on every great circle around the Earth, there are two antipodal points that have the same temperature. (Assume that the temperature on Earth is a continuous function.)
List of solvers
Doug Sherbon, Steve Wilmarth (undergrad); Dustin Moody, Robert Bradshaw, Doug Faust, Jacob Lewis (graduate); Konrad Schroder (staff); Marina Meila (faculty); Stefan Sharkansky Lloyd Sakazaki Kate Smith (outside).
Marina Meila wins the prize!