Blogger for Discover Magazine at Bad Astronomy, where he deconstructs misconceptions and explores the wonder of the Universe.
Work & Life Balance Expert
Marine Biologist, Educator & Filmmaker
Animal Jam - Ask Tierney: Why is a group of jellyfish called a smack?
Chief Operating Officer at Gradian Health Systems
Head of Culture & Trends at YouTube
Expert on Race Relations; Host, "PBS History Detectives"
Associate Professor of Natural Sciences at Harvard; Adjunct Research Engineer at the Monterey Bay Aquarium Research Institute