About Popular Science - December 2009 (US):
The "What's New" magazine of science and technology. Covering the latest developments in cars, electronics, communications, tools, energy, aviation, science, space exploration and much more.

Content issue:
29 HEALTH 35 AUTOMOTIVE 43 GADGETS 49 SECURITY 53 ENGINEERING 57 RECREATION 61 AVIATION & SPACE 65 HOME ENTERTAINMENT 69 GREEN TECHNOLOGY 73 HOME TECHNOLOGY 77 COMPUTING POPSCI INNOVATORS 60 NOT JUST HOT AIR Scuba gear inspired a student to insulate his line of outerwear with argon gas in place of down. 80 THE ANSWER MAN To create a better search engine, software genius Stephen Wolfram delivers facts instead of links. 33 THE PIED PIPER OF MUCUS An acoustics engineer tackles the U.S.’s MEGAPIXELS 14 Russia’s largest hydroelectric plant explodes. HEADLINES 17 ENVIRONMENT What is feminizing so many male fish in our rivers? 18 ENGINEERING An inflatable bridge that lasts longer and costs less. 20 SANTA TECH Technology that can speed St. Nick’s rounds. 24 REINVENTION OF THE MONTH An electric unicycle transforms into a two-wheeler. HOW 2.0 87 YOU BUILT WHAT?! A motorcycle with a sleek, roomy sidecar. 91 GRAY MATTER Taking pictures with radioactivity rather than light. 92 BUILD IT A wall clock that uses an optical illusion to show the time. 94 ASK A GEEK Find a good photo-editing tool online. FYI 96 Do balloons float on the moon? Can a paper cut kill? OTHER STUFF 10 FROM THE EDITOR 12 THE INBOX 112 THE FUTURE THEN