The Physics of Scuba Diving

A deep dive into the science of staying alive underwater.

The Problem With Spinning Spacecraft

To send astronauts on long-term space missions, it’ll take rotating habitats to produce artificial gravity. But…

Could Namor’s Ankle Wings From ‘Black Panther 2’ Really Work?

Other superheroes float, rocket, or jump their way around the Marvel Cinematic Universe—but this new flying…

The Physics of Smashing a Spacecraft Into an Asteroid

NASA will soon release the results of its DART mission to find out whether crashing a…

How Far Would You Have to Tunnel Underground to Lose 20 Pounds?

In What If? 2, Randall Munroe explains that evading gravity can reduce your mass—but let’s do…

The Physics of Going Fast—but Not Too Fast—on a Giant Slide

If you want to attain high speeds without getting airborne, it helps to know a little…

Could Climate Change Alter the Length of the Day?

Global warming is melting Earth’s glaciers, which is moving vast amounts of water—maybe enough to affect…

How Many Peanut Butter Sandwiches Does It Take to Fuel a Hulk?

It takes a lot of energy to jump over cliffs and hurl rocks at the speed…

What an iPhone Lidar Can Show About the Speed of Light

Lidar measures distance by bouncing light off of objects—but there’s more to how light travels in…

How to Simulate Walking on the Moon—Without Leaving the Planet

It’s impossible to reduce gravity, but you can find some clever ways around it.