Physical Science

Tour the inside of a nuclear power plant with these illustrative diagrams to learn more about how nuclear power plants work.

By Allison Loudermilk

When a corpse is found, the presence of insects gets a lot of attention during the investigation. But which bugs show up for the flesh feast? And how much can these bugs reveal about death?

By John Fuller

The magnets found in an MRI machine are incredibly powerful. It can pull a stethoscope right out of a doctor's lab coat. So what would happen if you forgot to take out an earring? Ouch!

By Katherine Neer

The nuclear arms race was a frantic era in which several nations tested nuclear technology and stockpiled warheads. Read about the nuclear arms race.

By John Fuller

Dropping atomic bombs on Hiroshima and Nagasaki ended World War II. How did the most powerful weapon in the world get developed? It started with the Manhattan Project.

By John Fuller

Why do newspapers turn yellow over time?

Imagine wearing a T-shirt with lettering on it while brushing your teeth. Why are the letters on the T-shirt reversed in the mirror, while your head appears right side up?

Scenario: A helium balloon is up against the ceiling one day, and the next day it's on the floor. Does the balloon fall because the helium leaks out, or because the helium molecules slow down due to decreased pressure?

By Austin Henderson

I have heard that carbon monoxide is extremely poisonous. Can you explain why?

Lasers are used in dental drills, eye surgery and even tattoo removal. But what exactly is a laser? There are numerous types, but all lasers work basically the same way. Learn how they generate such concentrated beams of light.

By Matthew Weschler

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

By Sydney Murphy & Austin Henderson

Sir Isaac Newton's Law of Universal Gravitation helps put the laws of gravity into a mathematical formula. And the gravitational constant is the "G" in that formula.

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

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 & Austin Henderson

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 & Austin Henderson

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

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

Superacids are those with an acidity greater than sulfuric acid. So which is the most super of superacids and what exactly is it used for?

By Allison Troutner & Austin Henderson

A unit circle is an important part of trigonometry and can define right angle relationships known as sine, cosine and tangent.

By Nokware Knight & Austin Henderson

A multiplication table is an easy-to-use grid of numbers that can help you learn to multiply quickly by using the chart and, eventually, your memory.

By Kristen Hall-Geisler & Austin Henderson

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

By Jesslyn Shields & Yara Simón

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

By Allison Troutner

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 & Austin Henderson

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

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

By Jesslyn Shields