Joel Achenbach writes about science and politics for The Washington Post's National desk. He has been a staff writer for The Post since 1990. He started the newsroom¡¯s first online column, Rough Draft, in 1999, and started washingtonpost.com¡¯s first blog, Achenblog, in 2005. He has been a regular contributor to National Geographic since 1998, writing on such topics as dinosaurs, particle physics, earthquakes, extraterrestrial life, megafauna extinction and the electrical grid. A 1982 graduate of Princeton University, he has taught journalism at Princeton and at Georgetown University.