Supersonic biplanes; Windows 8 police car; vibrating tattoo; one-man pothole-filling; hydrogen fuel in a safe liquid; and a battery made from paper waste.

Electron microscope images living organism; space launch on a maglev train; robot squirrel tests snakes; super-fast 3D micro-printer; sending messages with neutrinos; and lightning rod lasers.

Floating wind farm; Hollywood director’s deep-sea dive; self-checkout without bar codes; robot balloon cranes; airbags for pedestrians; and an invisible car.

USA Science and Engineering Festival, Kavli Science Video Contest; home levitation system; advertising for the ladies; robot fish leads school; tweeting open-heart surgery; speech stopping gun; and methane-powered launcher.

Robot sketch artist; Japanese space elevator; smart paint detects faults; driverless cars legalized; Hubble discovers a waterworld; and USB-powered genome sequencer.

In this episode Dan and Vince explore why future knee surgery could cost a king’s ransom, when the Russians will find out if there is life under the ice in Lake Vostok, a new roller coaster that gives 8 seconds of weightlessness, jaw transplant from a 3D printer, and an unusual source of electricity from cockroaches.

In this episode Dan and Vince show the geometry and physics behind the epic YouTube fail of Stuntman89's attempt to put his head between the blades of a ceiling fan and pull it out without getting whacked.

This week Dan and Vince pose the question, “will the fan blade hit me if I try to stick my head between the spinning blades?” There are legit prizes for solving. And even if you don’t enter, it’s fun to watch the YouTube guy try it.

This Week in Engineering - NASA's open-source initiative; liquid silver printed circuit boards; space junk code of conduct; smart underpants; infra-red frisking; and harpooning comets.

This Week in Engineering - Tiniest microphone ever; robots inspired by lizard tails; record-setting quantum computation; interplanetary rovers powered by bacteria; largest battery ever; and bridge construction with dish soap.