Geoff Notkin is an IPPY Award-winning author and publisher with three books in print and a fourth on the way. He has written hundreds of published articles on a wide range of topics including meteorite science, astronomy, paleontology, spaceflight, history, adventure travel, tech, and the arts. His work has appeared in Astronomy, Astronomy Now, Sky & Telescope, Huffington Post, Robb Report, Wired, USA Today, Readers Digest, The Village Voice, Seed, Meteorite, Mineralogical Record, All About Space, Geotimes, American Theater Arts, Arizona Daily Star, and many other national and international publications. For four years Geoff was a featured columnist for Arizona’s oldest paper, the now sadly defunct Tucson Citizen. He currently writes a science and spaceflight column — Throwing Pebbles at the Sky — for Ad Astra, the official publication of the National Space Society.