Physical Science

Your eyes aren't playing tricks on you. Those mountains way off in the distance really do look blue, and it's because of how light wavelengths scatter in the atmosphere.

By Mark Mancini

Both degrees and radians represent the measure of an angle in geometry. So, how do you convert one to the other?

By Mark Mancini

Most of the world uses meters, apart from the U.S. and a few other countries. So what's an easy way to convert from meters to feet and vice versa?

By Mark Mancini

Finding the range of a set of numbers is an easy subtraction problem!

By Jesslyn Shields

We all have favorite colors. But have you ever considered why you like one color more than another?

By Allison Troutner

There was a time (4,000 years ago) when simply being able to add might get your name on a clay tablet or help you accumulate vast wealth.

By Dave Roos

Converting kilogram measurements into pounds is not hard. We'll show you the textbook way plus two quick-and-dirty shortcuts.

By Mark Mancini

Cadmium is a natural metal and the leading component in rechargeable batteries and solar cells. It is also highly toxic and heavily regulated.

By Allison Troutner

Many people get speed and velocity confused. It's no surprise because the terms are often used interchangeably. But they're not quite the same thing. So how do you find the velocity of an object?

By Mark Mancini

The main function of the Krebs cycle is to produce energy, stored and transported as ATP or GTP, to keep the human body up and running.

By Jesslyn Shields

Discovered in the early 1800s from a chunk of smuggled platinum ore, rhodium is the most valuable precious metal on the planet today, used mainly for keeping car emissions in check.

By Allison Troutner

We'll show you both a quick and dirty way, and a precise, more complicated formula for converting a Celsius temperature to Fahrenheit (and vice versa).

By Sydney Murphy

If you have trouble sleeping you might have been told to get a white noise machine. But white isn't the only color of noise out there.

By Talon Homer

Scientists have come up with a new formula to describe the shape of every egg in the world, which will have applications in fields from art and technology to architecture and agriculture.

By Jesslyn Shields

Thorium is in many ways safer than uranium for nuclear power production. But is it safe enough to bet on for our energy future?

By Jesslyn Shields

Real numbers are the opposite of imaginary numbers and include every number you can think of.

By Jesslyn Shields

This human-made element can power everything from nuclear weapons to deep space missions. So what's so scary about plutonium?

By Mark Mancini

A perfect square is a number, but it can also be explained using an actual square.

By Jesslyn Shields

Dividing fractions is easy once you learn a couple of rules and remember three words — keep, change and flip.

By Jesslyn Shields

Numerators and denominators, oh my! It sounds complicated, but learning how to multiply fractions is easy. It just takes three simple steps.

By Jesslyn Shields

The lava-like material that formed after the Chernobyl nuclear disaster is a deadly example of corium, a hazardous material created only after core meltdowns. Five minutes next to it can kill a human.

By Patrick J. Kiger

First discovered in the late 1930s, muons are passing through you and everything around you at a speed close to light, as cosmic rays strike particles in our planet's atmosphere. So what are muons and how are they informing the new physics?

By Patrick J. Kiger

An imaginary number is a value that's the square root of a negative number. It can't exist on a one-dimensional number line. We'll explain.

By Patrick J. Kiger

Magnetism is at work all around you. Even our Earth is a giant magnet!

By Jesslyn Shields

A perfect storm of circumstances combined to create what one pool industry expert is calling "poolmageddon." Why? Because there's a major lack of chlorine in the U.S. right now. How will it affect the pool season?

By Jennifer Walker-Journey