Listing: Ask Dr. Science America's foremost authoritarian on the world around us. Or at least the world around him. | Cosmic Debris A look at life on Mars, anti-matter, plain old gravity and other cosmic phenomena from our favorite frivolous essayist, Gary Greenberg. | Factoids Designed to amuse and inspire students and colleagues. | HotAIR - the Annals of Improbable Research An international science humor magazine, rival to the Journal of Irreproducible Results, AIR chronicles both genuine and concocted research from the world's best and worst scientists and science writers. Also administers the annual Ig Nobel Prize ceremony. Many articles on line not in the print publication, and vice versa. | Martian Arts How do crop circles appear in fields? Are they the landing sites of flying saucers, UFOs, aliens? This video gives the (not so serious) answer! | Metric Conversion Chart For those of us who hate conversion problems (and who doesn't?), here are some conversion factors that are much more enjoyable than what we usually see in the back of the textbook. | |  |