Homer Simpson would love Kevin's bowling ball that is engineered to be steered into the pins each time. Or is it?

Grant is sure of his advantage in a paintball bet if he's wearing night vision goggles he built out of materials rustled up in the garage.

The guys hit the range with a lot of duct tape, and a lot of scenarios to craft something to stop a 9mm Luger round.

In the first pool test of Kevin & Grant's homemade submarine, things start to go belly up when Grant smells smoke.

Kevin and Grant turn their first test - choosing a tire for the monocycle - into a project of its own. Giant tire bowling with trash can "pins."

The guys build their life size punching robots, complete with pneumatic power. Round one proves to be brutal.

The mission is to escape from the island using nothing more than what they would have had in the ‘50s. Grant is in a makeshift raft, Kevin is going to swim.

The guys have built dream motorcycle chariots, and as always they had different approaches for their builds. Let’s see what happens at the first test.

The guys each invest in some heavy junkers and modify them to stand up to their personal Mad Max demolition derby. Lots of spikes are used.

Kevin and Grant wire together a crazy homemade lie detector with spare parts in the garage. They’ve kicked it up a notch by adding a shock if they are caught in a lie.

Kevin shows how quicksand is created by agitating a sand and water mixture. With Grant standing in it as a test.

The guys test several "squirt gun" formats, with one powerful enough to knock down a brick wall. Once that's done, they're off to build a better version.

People jump off tall things. Grant and Kevin want to do it right, so part of the prep is to create a cushion. Their first test is with carboard boxes

Kevin and Grant watched the internet community jumping off things using small parachutes, umbrellas, and tarps to break their fall. Naturally, they tried it too.

Kevin and Grant build two different types of earthquake resistant test tables and their own seismograph. Initial tests in the back of Grant’s truck provided inspiration.

Fascinated the the aerodynamics and speed of hydrofoils, the guys decide to build one. They understand the science, but they’ve never done it before. Prototype testing reveals what to do next.

Grant is sure of his advantage in a paintball bet if he's wearing night vision goggles he built out of materials rustled up in the garage.

Two guys are out to right the wrongs of bad experiments and epic "this is bound to work" fails by showing what went wrong via science in action.

Supermassive black holes aren't just spinning at the center of galaxies. They may actually be creating galaxies.

Stripping away the Milky Way's stars, planets, rocks and dust reveals a massive black hole lurking just 26,000 light years from Earth.

Astronaut Mike Massimino calls solar wind, "the biggest obstacle we have for exploring our universe."

More than 20 solar storms a day can occur on the surface of the sun. These energy surges can cause real problems down on Earth.

The dinosaurs died off after a massive asteroid strike with a billion times more energy than the atomic bombs dropped on Hiroshima. A team at NASA studies the impact to learn more.

In February 2013, a stunning sight in the sky over Russia made international headlines. The light of an asteroid hurtling toward Earth was brighter than the sun.

Scientists are studying Mars from every angle in preparation to send the first human astronauts to the Red Planet. Data from the Curiosity rover has proven invaluable.

Mars is home to Olympus Mons, the largest volcano in the solar system, which covers an area the size of Arizona.

Saturn's tiny, frozen moon Enceladus could hold the secrets to extraterrestrial life.

Titan, the largest moon of Saturn, could be the most alien world in our solar system.

Built in 1914, the Panama Canal couldn’t handle today’s modern ships. Get a feel for the scope of one of the largest modern infrastructure projects as engineers overhaul the Canal.

The innovative Maglev train can move up to 431 kilometers/267 miles per hour using magnetic levitation.

The Five-hundred-meter Aperture Spherical radio Telescope, or FAST, is a radio telescope located in the Dawodang depression in China.

Sound mirrors helped Great Britain detect enemy aircraft during World War One.