The makers of Grayl start their quest for funding with Brook and Brian putting the water filtration system to the ultimate test. Drinking filtered toilet water.

Brook and Brian look over the Rocketskates in the lab, but the true test comes with a test on the streets. Find out what happens after a shaky start.

Brian and Brook know the only place to test Reflex Strike, the boxing glove designed to sharpen your reflexes, is in the ring. They have some fun, but does it stand up to a pro?

The Droidel made it through the expert test, but the consumer test has the father-son team worried if their little social robot is doomed.

Liquid Off is off to a decent start with a viable expert test, but the team knows it is how the consumer perceives it that guides whether Marc makes an investment.

The first step is the pitch, and the panel pulls no punches if they aren't sold on an idea right out of the gate. But, they will rely on the tests to form their final opinion.

Innovative duo showcase their new brand of water filtration.

Check out the helicopter you fly with your brain.

Brook and Brian get the briefing on how the Mind Rider bike helmet uses brainwave sensors to gather information about a rider and the environment around them.

The Zero Hour flashlight/power source had people talking about its versatility and design, but what did they say about the price?

Passing the expert test, Bondic moves on to face consumers. After a few tries the testers seem to get it, but what does Marc think?

Straight out of high school these makers have created a Roboarm which they hope will revolutionize the prosthetics industry.

Two regular firefighters who got frustrated with weak laces on their boots took to their garage to dream up something that would hold up. But do they hold up to their claim of "indestructibility?"

This invention was inspired after the inventor saw construction crews using fragile home appliances on build sites. He’s got a partner who made the Coffeeboxx look pretty rugged, but is it?

Brook and Brian can’t wait to test this unique grill. JR, the inventor, boldly claims this wood burning stove – that can work in an environment – get reach 1000 degrees in five minutes. He’s going to be held to his word.

The judges love the advanced prototype called the "Bionic Boot." The boots mimic an animal's leg and claims to allow the user to run 25mph, but Marc's concern is safety.

The iTraq usues cellular technology to track those who carry the iTraq device. The consumer test indicates interest and demand, but Brook and Brian had a few issues with the test.

These makers have created a carbon fiber toy airplane that you control via an app on their phone. Brook and Brian love the idea but it's got to prove durability.

Not only is the Easy Drone XL portable and easy to control, it also can deliver burritos!

WUF claims that it can help find runaway dogs using cellular, bluetooth, and GPS technologies. How well does it actually work?

The Ollinfit gives you feedback as you workout by using three seniors and a phone app. We’re putting on our workout gear and taking this product to the gym for testing!

Author Nick Sagan hasn't seen his godfather, Frank Drake, in over 30 years. We capture their reunion - and find out how Drake became friends with Nick's famous father, Carl Sagan, in this exclusive clip.

What would receiving a message from an alien civilization tell us about human evolution, and about surviving the most serious problems facing our planet?

Author Nick Sagan hasn't seen his godfather, Frank Drake, in over 30 years. We capture their reunion - and find out how Drake became friends with Nick's famous father, Carl Sagan, in this exclusive clip.

Since launching in 2009, the Kepler program has detected hundreds of previously unknown planets. How many of them are Earth-like, and what does that mean for the probability of intelligent life beyond our solar system?

Since the 1960s, NASA has been keeping an eye on man-made objects in space. Here, engineers are replicating the devastating impact of space debris. 'Alien Encounters' airs Tuesdays at 10/9c.

Will ETs look like us? Will they resemble giant insects? Scientists debate how various environments could have created life forms beyond our wildest imagination.

It's possible that life on earth began off-planet and spread here.

If the chirality of aliens is different than ours, it couldn't interact with us, and therefore would be non threatening.

It's likely that an advanced civilization would combine the advantages of a machine with the advantages of biological systems.

An alien spacecraft might not rely solely on sunlight to power its trajectory. Find out what other energy technology aliens could use to travel through the universe.

Have you ever wondered how sushi is caught? From the sea to your restaurant table, catching sushi has become not only a delicacy but a difficult job.