Radiation Is Everywhere. But It’s Not All Bad
Although radiation sounds scary, it isn’t necessarily harmful. Here’s what to know about the four types.
How to Cool an Object Without Using Any Energy
It seems impossible, but there’s a way to cool things off without tapping into a fuel source. (Hint: It involves outer space.)
When You Drop a Rock Overboard, What Happens to the Water Level?
In the physics of water displacement, the answer isn’t always intuitive.
OK Surfers, How Much Would It Cost to Power Your Own Wave?
How much energy would it take to fuel a wave that you can shred like Kelly Slater? Here’s the math.
All the Ways to Slow a Car (Even Some Bad Ways)
Electric vehicles are increasingly popular, so it’s time to talk about regenerative braking—and all the other ways you can stop a vehicle.