Geochemist Irene Schimmelpfennig, of Columbia'sLamont-Doherty Earth Observatory, is a glacial sleuth. She calculates times when ice advances and retreats in the shrinking Swiss alpine glaciers bymeasuring the concentration of isotopes in rocky deposits.
The trusted triad: Richard Alley, Wallace Broecker and George Denton. The three scientists carry on the late Gary Comer's philanthropic mission to seed ground-breaking climate research and organize the Comer Conference to share the findings each year.
To provide a space for scientists from around the world to present and display their research at the Comer Conference, an airplane hangar is transformed with tarps and tables.