### 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.

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# Category Archives: Science / Physics and Math

### Radiation Is Everywhere. But It’s Not All Bad

### A New Map of the Universe, Painted With Cosmic Neutrinos

### How to Cool an Object Without Using Any Energy

### The Lawlessness of Large Numbers

### When You Drop a Rock Overboard, What Happens to the Water Level?

### ‘Now I Am Become Death, the Destroyer of Worlds.’ The Story of Oppenheimer’s Infamous Quote

### OK Surfers, How Much Would It Cost to Power Your Own Wave?

### All the Ways to Slow a Car (Even Some Bad Ways)

### A Computer-Assisted Proof Solves the ‘Packing Coloring’ Problem

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Although radiation sounds scary, it isn’t necessarily harmful. Here’s what to know about the four types.

Physicists finally know where at least some of these high-energy particles come from, which helps make the neutrinos useful for exploring fundamental physics.

It seems impossible, but there’s a way to cool things off without tapping into a fuel source. (Hint: It involves outer space.)

Mathematicians can often figure out what happens as quantities grow infinitely large. What about when they are just a little big?

In the physics of water displacement, the answer isn’t always intuitive.

The line, from the Hindu sacred text the Bhagavad Gita, has come to define Robert Oppenheimer, but its meaning is more complex than many realize.

How much energy would it take to fuel a wave that you can shred like Kelly Slater? Here’s the math.

Electric vehicles are increasingly popular, so it’s time to talk about regenerative braking—and all the other ways you can stop a vehicle.

There’s a surprisingly straightforward answer to how many numbers are needed to fill an infinite grid so that identical numbers never get too close together.