When you're vacationing on a beach, nothing beats an underwater camera; but watertight cases are pricey and disposables have lousy quality. Lucky for you, the editors of PopSci have come up with an easy workaround using something there's probably already plenty of in your suitcase (hint: not socks). That's right, thanks to the magic of unlubricated condoms, you too can transform your point-and-shoot into an waterproof wonder. The set-up is easy enough, but as John and Doug demonstrate, it really does help to have a partner lend a hand.

You never know when the level of festiveness in your home might suddenly become critically, even dangerously low. Thankfully, one vigilant soul has put such concerns to rest by creating the Emergency Party Button, a DIY system that with one press transforms a seemingly ordinary apartment into something resembling Rick James’s rumpus room.

We've told you all about the Raytheon Sarcos XOS exoskeleton, the smart suit of armor that endows its wearer with super-human strength. Now see it in action, and meet the minds behind both Iron Men—real, and imaginary.

Sure, external hard drives aren't exactly scarce these days, but while the price point has come down a lot, they're still not cheap. Enter the hard drive case. For just a fistful of dollars, you can pick up a case that (almost) instantly transforms your old internal hard drive into a new storage unit. As Deputy Editor Jake Ward demonstrates here, putting it together is a piece of cake. In the end, you'll have a great-working hard drive, not to mention a few dollars more. Just, keep an eye out for the tiny screws.

You're unique. Aren't you? One of the more creative hypotheses surrounding quantum mechanics posits the exact opposite. Though we can readily see only one world, quantum mechanics says that when we’re not observing the particles that make up that world, those particles exist in multiple places at once. There are many theories that attempt to grasp what this means, but one of the most tantalizing is Hugh Everett's multiverse concept.

Two years ago we showed you Boston Dynamics' incredible BigDog—one of the world's most ambitious legged robots—being developed for DARPA and the U.S. Army. With its advanced system of hyper-responsive hydraulic joints and a suite of sensors, accelerometers and gyroscopes, the BigDog's most stunning achievement is it's ability to walk, climb and maintain its balance on diverse terrain, even after slipping on ice or receiving a kick to one side. All while carrying several hundreds of pounds of supplies on its "back."

What do you get when you cross stitch taxidermy with the mug of a “dead” robot? Well, if you’re the artist/robot teacher France Cadet, you get a wall full of interactive robo-trophies programmed to react to their environment.

Soon after the Nintendo Wii’s release, hackers immediately began uncovering ways to use its unique motion-sensing controller to interface with other things—PCs, musical instruments, you name it. But Tom Tlalim, an Israeli-born composer who now lives in the Netherlands, may have outdone them all: His full-body, eight-piece “suit” of Wiimotes interfaces fully with custom software to turn his entire body into an electronic instrument that responds to his every motion. In his suit, Tlalim doesn’t play songs. He dances them.

Usually our 5-Minute Projects involve soldering and LED lights and other such electronic accoutrements, but this week we decided to skip the fancy stuff in favor of an old-school science project: making rheopectic slime from Borax and glue. This is a pretty safe experiment even for kids--just make sure to do it with parental supervision and keep the Borax, slime, and any fingers that have been touching the aforementioned items out of eyes, noses and mouths.

Last night at approximately 10:26 EST, after a long buildup of preparations, the Navy took the controversial step of shooting down a dead U.S. reconnaissance satellite from its low-Earth orbit. The satellite, which is about the size of a school bus, was destroyed to prevent a potentially hazardous impact with Earth, the military has said. It was moving faster than 17,000 mph at an altitude of 133 nautical miles above the Pacific when a modified SM-3 anti-ballistic missile launched from the USS Lake Erie, a Ticonderoga-class AEGIS missile cruiser, reportedly made impact.