Cats may help save us from nuclear Armageddon.

Screams activate the portion of our brain that houses our fear circuits.

We shed about 40,000 skin cells every hour, but somehow tattoos stay put.

When two books are interlaced they can lift two tons!

What’s the trick to winning five dollars? You have treat the dollar bill like a band aid.

Our brains can interpret an image just 13 milliseconds after we see it, but we still don’t catch everything. For our visual system to correctly process everything we see, our brains would have to be the size of houses!

Even small surprises can set off activity in the brain called the Nucleus Accumbens. That’s one of the brain’s pleasure sensors!

Beer tapping causes a chain reaction. A shockwave travels through the beer and fragments the bubbles.

Space junk, of any size, is no joke. Paint flecks can travel eight times the speed of a bullet through space!

Kilobots are modeled after the hive mindset often seen in nature. These teeny robots can work together to accomplish goals.

Salmon can swim hundreds of miles and throw themselves up over waterfalls, but hydroelectric dams can be a struggle for them. This pneumatic tube shots them to safety!

The Thatcher effect is a phenomenon where it becomes more difficult to detect emotions and features in an upside-down face. Can you guess if this man is happy, sad, or angry?

30 lemons to be exact. When your phone is out of juice, you can charge it with this juice!

Light moves fastest in a vacuum where nothing is impeding its travel. Once light hits a dense medium, it changes speed and direction.

Without a suit, space is not a friendly place. The good news is, you would pass out so quickly, you would’t be awake to witness it.

Not that we suggest you try it… Human hair is composed of various amino acids that wrap around each other like chains on a molecular level.

Screams activate the portion of our brain that houses our fear circuits.

Dan Riskin reports from Mission Control where the Pluto Fly By has happened. Now we wait for it to turn and take more images.

Why push the limits of the universe? We just want to know what's out there to be discovered. What would it be like to see Pluto.

Did you know Bill Nye, along with the Planetary Society, was one of the first to advocate for the New Horizons mission. He can't WAIT to see what it finds.

We've seen it done in the movies - the perfect car slide in between two parked cars. Think of it as an adult slip n' slide. They guys start by testing pavement lubricants to see what works.

Kevin and Grant have built two versions of their trash can rocket and in true scientific method, they test them out without the propellants first to see if they are air-worthy.

Kevin bets Grant they can build a workable concrete canoe. Despite explaining the science behind how it could work, Grant is dubious. A steak dinner is on the line.

Before they start building their rocket powered skateboard, Grant and Kevin have too much fun doing thrust tests with leaf blowers and fire extinguishers. But, they form a plan.

Kevin and Grant have completed the build of their electromagnetic gravity defying boots. Kevin takes the first turn and finds out it takes more than science to make them work.

The guys are inspired to see how many G-forces they can pull on a handmade merry go round powered with a motorcycle. They wisely try the first test with sandbags.

The guys are building their own "mini-weapons" to compete for accuracy, durability and distance. After Grant bends the rules, the game is on to build anything that will win.

Kevin and Grant want to do lawnmower jousting right, from armor to weaponry. The first step is comprehensive tests for the best jousting pole.

After Grant and Kevin watch some three-wheeled destruction on the internet, they brainstorm how they could do it better - with motorized trikes.

The guys decide they can one up some epic cannon fails with their own homemade Gatling gun, customized to shoot meatballs. Check out the build of both meat and firepower.

After viewing typical science fair style homemade volcanoes, Kevin and Grant head into the field to build a giant version, complete with the three phases of volcanic explosion.

Kevin and Grant weld an air cannon in Kevin’s garage to break Don Meredith’s football passing record of 83 yards. They bring the cannon to the field for a "slug" test. Is it record worthy?