How Much Energy Can You Store in a Stack of Cement Blocks?

It's not a trick question: You can make a battery out of concrete by storing gravitational…

How to Show That the Earth Orbits the Sun

With simple tools, there are three things you can observe to support the heliocentric model of…

Three Science Experiments You Can Do With Your Phone

Your phone can measure acceleration, magnetic field, sound, location, and maybe more—which turns it into a…

The Physics of Catching a Gnarly 80-Foot-Tall Wave

Surf's up, dude.

Watch a Harlem Globetrotter Sink a Shot from a Plane

Really, this is a classic projectile motion physics problem.

You Can Learn Everything Online Except for the Things You Can’t

College is like a chocolate chip cookie, and courses—online or not—are the chocolate chips.

You Can Learn Everything Online Except for the Things You Can’t

College is like a chocolate chip cookie, and courses—online or not—are the chocolate chips.

How Much Power Does It Take to Fly in a Real-Life Jet Suit?

To hover a human over the ground, you need some serious engineering—and the momentum principle.

How Much Power Does It Take to Fly in a Real-Life Jet Suit?

To hover a human over the ground, you need some serious engineering—and the momentum principle.

The Surprisingly Cool Physics of Pushing a Block Against a Wall

You might think this is just a boring physics problem—but you'd be wrong.