An Underwater Bullet In Super Slo-Mo Is Breathtakingly Beautiful

You may remember our friend Destin at Smarter Every Day shooting an AK-47 underwater. It was a cool experiment, but the pressure caused the aquarium to shatter, ruining what we now know would have been an amazing shot. To solve this problem, he built a sort of reverse-periscope for a Phantom camera and shot the AK-47… » 7/23/13 2:37am 7/23/13 2:37am

High Speed Footage Reveals an AK-47 Works Even Better Under Water

The AK-47 can be considered the Timex watch of the gun world. It takes a licking, and keeps on ticking, except that by ticking we of course mean firing round after round of ammunition. The automatic machine gun is based on a gas recoil system that uses the hot expanding gases of a bullet being fired to automatically… » 6/24/13 10:36am 6/24/13 10:36am

Ants Will Give You Free Advertising If You Pee On The Billboard

Most people don't take a trip to the Amazon looking for publicity opportunities, but if you stumble on one you have to run with it, right? At Smarter Every Day, Destin and his rainforest guides took advantage of the complicated process leafcutter ants go through to forage for salt and got the ants to carry a little » 5/26/13 6:15pm 5/26/13 6:15pm

These Exploding Droplets of Glass Are a Bewildering Quirk of Physics

Making a Prince Albert's Rupert's drop is easy; you just let some molten glass drip into a bucket of water. But the resulting structure is so much more complex than the process that made it. The guys over at SmarterEveryDay took an in-depth look to explain why part of it can't be destroyed with a hammer, while… » 3/23/13 1:00pm 3/23/13 1:00pm

The Slow-Motion Physics of Hand-Held Slingshots

We're big fans of the Smarter Every Day and Slingshot YouTube channels—so it's always nice when Destin and Joerg, their respective owners, get together. This time round, they use high-speed photography to take a close look at the physics of hand-held slingshots—and work out how to make them as destructive as possible. » 7/20/12 5:23am 7/20/12 5:23am

So How Does the Horizontal Spinning Blade On a Helicopter Propel It…

Just because it's the weekend doesn't mean you have to switch your brain off completely. Smarter Every Day continues its video series on the physics behind helicopters with a look at how choppers use something called a swashplate to vary the pitch of its rotor blades to climb higher and fly in any direction. » 3/24/12 6:00pm 3/24/12 6:00pm