Don't panic.

I'm scared of spiders. I'm not afraid to admit it. I love them in a scientific sense, or from a "let me look at you from way over here" sense, but that's as close as I get. Here's a look at the science of why some of us are afraid of spiders, snakes, roaches, and other creepy crawlies. Did I evolve to be this way, or did I learn to be afraid of them? It seems to be an open question

We've got two perfectly good hands attached to two perfectly good arms, so why do most people prefer to use one over the other for common tasks?

This time, we're the asteroid

My tribute to Curiosity, both the NASA rover and the human desire to discover, featuring words from some of science's greatest minds and LEGO's special edition Mars rover set

Scientists overwhelmingly agree that our climate is changing, Earth is getting warmer, sea levels are rising, and it’s primarily because of humans putting lots of carbon dioxide in the atmosphere. Whether you already trust in the science, you’re undecided, or you disagree with what all this, this video is for you!

Scientists overwhelmingly agree that our climate is changing, Earth is getting warmer, sea levels are rising, and it's primarily because of humans putting lots of carbon dioxide in the atmosphere. Yet 4 in 10 Americans aren't convinced. Here's what psychologists and sociologists have to say about why some people don't believe in climate science.

Happy Holidays! Ever wonder how Santa could possibly manage to deliver all those presents in a single night? Or what gives red-nosed reindeer the ability to fly? And why do your Christmas lights get tangled in knots no matter how carefully you put the away?!

Do you ever talk to your dog? Do they ever talk back? Humans and dogs have a truly amazing relationship, developed along an evolutionary journey that goes back nearly 10,000 years. Do they really understand what we say, think, and feel? Recent research suggests dogs know more about our language and emotions than you might think.

You've felt cold before. Sometimes it's cold outside. But what if I told you that "cold" isn't real? There's no substance or quantity called "cold" in science. We can't measure the amount of "cold" in something.

Our bodies do a lot of weird things, and many of them are completely involuntary. Why do we often jerk our bodies awake right before falling asleep? Why do we yawn? Why do we hiccup? Why do some people sneeze when they look at the sun? And why does your eye twitch? This week we'll look at the science behind these crazy involuntary behaviors!

Ever wonder how the heart symbol came to stand for the actual heart? And why do we speak of the heart as the seat of love, when love really happens in our brains? Is it true that animals only get a billion heartbeats? This week, we give you enough cool cardiac science to make your heart skip a beat

As more and more parents are choosing not to vaccinate their children or are vaccinating them later, diseases like measles are making a comeback. Are vaccines safe? How do vaccines work? Why do some people claim there is a link between vaccines and autism? This week we look at why are people afraid of something that has saved so many lives, and look at the history and science of vaccines.

Why does February only get 28 days when all the other months get 30 or 31? The answer is part superstition, part politics, and parts astronomy. Basically, it’s the Romans’ fault.

Shows like The Walking Dead are full of hungry, mindless, surprisingly fleet-footed armies of brain-eating zombies. Could they actually exist? Are zombies real? Well, maybe if you’re talking about zom-bees! This week I introduce you to some of nature’s strangest mind-controlling parasites, who make zombies of the natural world. This one will make your brain tingle.

We teamed up with Amy Poehler's Smart Girls to ask you who your #sciencewoman heroes are. Here's what you told us!

When you stare up at the night sky, you might think that the universe is really black, but that's just because our eyes aren't sensitive enough to see the billions and billions of multicolored stars out there. Ever wonder why certain stars are certain colors? And what color is our sun, really? If we looked at enough stars, could we figure out the average color of the universe?

The rise of superbugs and the resistance of antibiotics!

What is the loudest possible sound? What about the quietest thing we can hear? And what do decibels measure, anyway? In this video you'll learn what makes sound

According to Newton's law of gravitation, the sun should "pull" way harder on the moon than the Earth does. So does the moon actually orbit the Earth? Why?