50: number of cameras researchers are using to study penguin populations in the Antarctic. You can help researchers identify penguins in adorable photographs, all while helping to train their artificial penguin-spotting intelligence.
1/2 millimeter: width of a huge "artificial atom" used to build a photon lattice at Princeton University. (That's big enough to see with the naked eye!)
360 degrees: range of a missile-downing laser that could be mounted on warplanes. Strategists hope it wil serve as an alternative to stealth technology for certain missions.