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What Kind of Sorcery Lets People Swim In This Sand-Filled Hot Tub?

You can try as hard as you want, but you’ll never be as cool an uncle as ex-NASA JPL engineer Mark Rober. Using elaborate experiments, he makes learning about science even more entertaining than Bill Nye did, and his latest invention is a sand-filled hot tub that somehow still behaves like water you can swim in. Read More >>

science
Science Helps Reveal Which Fairground Games Are a Scam, and Which Ones You Can Actually Win

The prizes, the lights, the sounds, and a quick-talking barker make it hard to resist playing Fairground games, but is every game a fool’s bet? In his latest video, Mark Rober, an ex-NASA JPL engineer, breaks down the science of what makes some of these games so challenging, and others near impossible to win. Read More >>

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The World’s Biggest Super Soaker is Powerful Enough to Shatter Windows

Last summer, Mark Rober built the world’s largest Nerf dart gun, capable of blasting foam at 40 mph. Sure, that made it slightly more dangerous than the toy it was based on, but it doesn’t even come close to Rober’s latest bonkers creation: a giant Super Soaker that fires water at 243 mph. Read More >>

toys
The Greatest Hot Wheels Track Ever Built Ends With an Explosive Finale

Mark Rober, who we last saw engineering a dart board that guaranteed a bullseye with every throw, has just built what every car-loving kid always dreamed of: an epic Hot Wheels track that has tiny vehicles racing between floors, through swimming pools, and jumping over giant explosions. Read More >>

design
Brilliant Motion-Tracking Dart Board Guarantees a Bullseye With Every Throw

A night at a local pub isn’t complete without a few rounds of darts, but as your blood-alcohol level rises, your ability to hit the bullseye greatly diminishes. Unless you’re playing with Mark Rober’s motion-tracking dart board that automatically repositions itself so you’re guaranteed to hit the bullseye every time. Read More >>

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Shooting Crazy Super Soakers Filled With Paint is a Lot of Silly Fun

If you crossed a Super Soaker with a paintball gun, you’d get this wild creation from our friend Mark Rober: a crazy weapon that shoots out streams of paint like a Super Soaker would shoot out water. Read More >>

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Why Glass Bottles Shatter at the Bottom When You Smack the Top with Your Bare Hands

There’s nothing quite like using the scientific method to figure out what’s happening in a silly party trick that we’ve seen way too many times (if you’ve been to bad parties, at least): the ol’ smack the top of a glass bottle and watch the bottom burst out in shards gag. Read More >>

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What Happens When You Dive Into a Pool Filled With 25 Million Squishy Waterballs?

Would you sink or float if you were tossed into a gigantic vat of squishy gelatinous spheres, more popularly known as Orbeez? Mark Rober, one of the Backyard Scientists, decided the only way to definitively answer the question that few have ever asked was to fill an entire pool with 25 million of the tiny spheres, and dive in. Read More >>

toys
The World’s Biggest Nerf Gun Can Shoot Darts at 40 MPH

Every child and every adult who wants to be a child again loves a good Nerf gun. They’re fun to shoot, whether you’re playing in your gardens or across the office. Mostly because Nerf guns are basically harmless. Well, the game done changed. Read More >>

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Bouncing On a Trampoline With Water Balloons Is the Best Way to Feel Like a Kid Again

Here’s how you spend a good summer day: find a giant trampoline, fill up 1,500 water balloons, and then bounce around trying to break as many as you can. It’s essentially a McDonald’s playpen crossed with a bounce house...with a lot of water. Read More >>

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Are Grenades Deadlier on Land or Under Water?

YouTube scientist Mark Rober and molten metal obsessive BackyardScientist teamed up to answer a simple question: is a grenade deadlier on land or under water? But in order to answer that, we need to understand exactly what a grenade does. Read More >>

gadgets
Infrared Microwave Shows Your Food Change Colour as it Heats Up

After watching this video I feel like the best microwave I've ever used sucked very badly. What you see here is a concept for the Heat Map Microwave, which would have a built-in IR camera on top and a screen on the front, effectively allowing you to see exactly when your food has been heated all the way through. Get this thing in my kitchen right now. Read More >>

wtf
Smartphones Turn These Masks Into Incredible Animated Halloween Costumes

Proving that sometimes all it takes is a popular YouTube video to kickstart a successful business, Mark Rober, the guy who made the gaping-gut costume using two iPads a few years ago, is back with even more easy but impressive costume ideas. And that includes a line of Halloween masks that come to life with nothing but a smartphone running a free app. Read More >>

security
A Simple Trick to Protect Your PIN From Thieves With Thermal Cameras

Thermal cameras were once expensive and bulky hunks of equipment that very few people could get their hands on. No longer. With FLIR's new iPhone case thermal imaging cameras are now both affordable and incredibly discreet, which means that evil-doers can use it to see the thermal signature your fingers leave on a keypad and steal your cash machine PIN. Here's a very simple way to thwart that. Read More >>

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NASA Engineers Built an Insanely Complex Bullet-Time Rig For Fun

Back in May, our friend and ex-NASA JPL engineer Mark Rober, figured out a way to shoot "bullet time" videos on the cheap, with a ceiling fan, a pair of flashlights, and a GoPro. Pretty damn creative, but the rig had its limitations. So Mark set out to find a way to create a similar set-up, this time using a high-end Phantom camera. Thank goodness. Read More >>