Dark Matter and the Dinosaurs

Randall, a noted astrophysicist, explains how the extinction of the dinosaurs could be related to galactic astronomy and the distribution of dark matter in the galaxy. Her fascinating idea involves disturbances of our myriad Oort Cloud comets at the very edge of the solar system by encounters with clouds of exotic dark matter. The collisions with dark matter, the resulting comet storms and mass extinctions occur roughly every 30 million years as we cycle through the galaxy. Her provocative hypothesis provides a potential remarkable consilience of astronomy, geology, and the history of life.