Physical Science

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

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

By Mark Mancini

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

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

The answer to the question "Does time exist?" may seem obvious, but is it? And what if time doesn't exist, but is merely a human construct?

By Sam Baron

With a little patience, you can master this trick of converting binary code to decimals - and have fun doing it!

By Mark Mancini

Did you ever wonder how to measure how fast sound travels in the air? Read this article to learn how to measure sound travel in the air.

By HowStuffWorks.com Contributors

Thanks to the Faraday cage, we can control electricity and make it safer for our computers, cars and other inventions.

By Chris Pollette & Nathan Chandler

You want to learn how to read the electric power meter in your home to see if the meter reader sent by the electric company was accurate. This article will teach you how to read a power meter.

By HowStuffWorks.com Contributors

Nuclear waste epitomizes the double-edged sword of modern technology. It's a toxic and radioactive byproduct of nuclear medicine, nuclear weapons manufacturing and nuclear power plants.

By Nathan Chandler

The list of superstar athletes accused of - and admitting to - taking performance-enhancing drugs is almost as impressive as the number of sports that they compete in. And we're not just talking about steroids.

By William Harris, Jennifer Walker-Journey & Austin Henderson

Seven ounces a ray! No, that's a lie. Measuring the weight of light is not as straightforward as that. So what's the more complicated explanation?

By Kate Kershner & Yara Simón

Atoms: the building blocks of life and the universe. We're all made of these microscopic bits of matter, but how many does it take to make a complete human being? And exactly what kinds of atoms do we have inside us?

By Laurie L. Dove

First there was Volvo. Then came IKEA. Well get ready for the next major Swedish export: snus, a smokeless tobacco product, similar to dip or chew.

By Matt Schwarzfeld

You use the number zero all the time, but it may surprise you to learn that it sometimes isn't a number at all. It may surprise you even more to learn that it was all but invented. See what else surprises you about zero in this article.

By Josh Clark

You need to make a magnet stronger, but you're not sure how to do it. Learn about how to make a magnet stronger in this article.

By HowStuffWorks.com Contributors

Over the years, nuclear reactors have been viewed as both a miracle and a menace. How does a nuclear reactor do its job? And what happens when something goes wrong?

By Patrick J. Kiger

It's lunchtime, and you've spastically spilled soda all over your desk. Chances are you could tackle that mess faster than we could say "Mr. Clean." What do you do though when the spill is radioactive?

By Jonathan Atteberry

Nuclear meltdowns can be scary, but it's important to understand what causes them. Learn about how nuclear meltdowns work.

By Robert Lamb & Desiree Bowie

Mathematics achieves the sublime. Sometimes, as with tessellations, it rises to art. In their simplest form, tessellations consist of a single shape that repeats over a two-dimensional plane without any gaps. Why was M.C. Escher so fixated on them?

By Nicholas Gerbis

Fractals have been around forever but were only defined in the last quarter of the 20th century. Think you can wrap your brain around how fractals work?

By Craig Haggit & Yara Simón

A world without math is unimaginable. It's a part of who we are. It's the analytical juice of our left brain. In the words of physicist Richard Feynman, even a fool can use it. So why do so many of us turn our backs on numbers?

By Robert Lamb

We're all exposed to tiny levels of radiation, but a blast of it can leave you in agony - that is, if it doesn't kill you outright. What is it, what causes it and how can we treat it?

By Ed Grabianowski

What happens when there's too much voltage? Learn about the difference between voltage surges and spikes from this article.

By HowStuffWorks.com Contributors