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Mark Rober

World’s Largest Jello Pool

World’s Largest Jello Pool

The idea of filling a swimming pool with gelatin seems simple enough, but as engineer Mark Rober explains, it’s way more complicated than you might think. Leave it to a rocket scientist to figure out how to boil and then refrigerate an entire pool filled with 15 tons of Jello.

Rocket-Powered Golf Club

Rocket-Powered Golf Club

Mark Rober and his friends worked with Destin of Smarter Every Day to add rockets to a golf club. The resulting contraption can consistently propel a golf ball to 150mph. It’s so powerful, they couldn’t find the balls it hit. They also made a weaker handheld version.

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Glitter Bomb vs. Package Thieves

Glitter Bomb vs. Package Thieves

After one of his packages got stolen, Mark Rober and his friend spent 6 months making a smart glitter bomb. Not only does it spew a ton of glitter, it also sprays fart spray and best of all records the whole thing. Here it is punishing evildoers.

The World’s Largest Air Horn

The World’s Largest Air Horn

Mark Rober wanted to demonstrate how horns work, so he built what’s quite possibly the largest air horn in the world. After explaining how horns amplify sound, he tested the horn in a remote area. It carried sound clearly from as far away as 2.5mi.

Debunking the Flying Phone

Debunking the Flying Phone

A while back, a video made the rounds showing what was supposedly a flying phone case. We figured it was fake, but as Mark Rober and Captain Disillusion point out, it also scammed people out of cash. Keep an eye on Peter Sripol’s channel for his WORKING version.

Tips for Beating Escape Rooms

Tips for Beating Escape Rooms

Mark Rober spoke with game design professor Dr. Scott Nicholson to learn 10 tips that can help you beat any escape room. The tips include not overthinking clues, knowing where to search, and having someone to organize the rest of the group.

Building a Rock Skipping Robot

Building a Rock Skipping Robot

Mark Rober has built a lot of fun and fascinating gadgets. He explains his process with his latest build – a rock skipping robot. Through rigorous research and testing, he was able not only to build the robot but to learn how rock skipping works as well.

Lemon-powered Supercar

Lemon-powered Supercar

VW turned up to Pike’s Peak this year and broke the course record with their I.D. R EV. Prior to the race, the automaker challenged Mark Rober and William Osman to collect a little extra energy for their their supercar. We like to think the citrus power made the difference.

The Lost Wallet Honesty Test

The Lost Wallet Honesty Test

Engineer and inventor Mark Rober recently lost his wallet, and he never got it back. But was that an isolated incident, or are there still honest people in America’s cities? Mark decided to find out by dropping 200 wallets in 20 cities to see to gather some data on human behavior.

Arcade Scam Science

Arcade Scam Science

After using science and math to point out all the ways in which the decks are stacked against you at carnival games, engineer Mark Rober is back to show us how coin-operated arcade prize games aren’t any better.

Liquid Sand Hot Tub

Liquid Sand Hot Tub

A fluidized bed is a mixture of a solid and a fluid that behaves like a fluid. To show us how it works, Mark Rober mixed sand with bursts of air – when the air is piped in, the sand behaves like it’s a fluid. Just for kicks, he also made a larger bed using a discarded hot tub.

World’s Largest Super Soaker

World’s Largest Super Soaker

Not satisfied with having the world’s largest NERF gun, Mark Rober and his friends spent a total of 6 months making the world’s largest Super Soaker. The 7ft long gun shoots water at up to 272mph using pressurized nitrogen.

World’s Largest NERF Gun

World’s Largest NERF Gun

Mark Rober teamed up with Eclectical Engineering to create this awesomely unwieldy weapon which fires huge foam darts, made from pool noodles and toilet plungers. Thanks to compressed air, it can fire darts at speeds up to 40 mph. Check out the gunpowder upgrade.

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