Max, Chris, and Joey decide to test out some new custom-made blades and explain the best way to dispatch a zombie. The undead better think twice before going up against these guys!

Now that astronaut Scott Kelly is back on earth, scientists are studying how all that time altered his body.

After months of pestering, Karl finally goes to see a doctor for a prostate exam. As an added bonus, Ricky and Steve get to watch the whole thing on a video monitor.

In a spectacular discovery, a team of scientists came across a 600-mile long coral reef located at the mouth of the Amazon River, all hidden under muddy waters.

See how an asteroid collision could result in the Earth spinning closer to the sun.

Explore the possibility of communication with aliens through satellite signals.

One way the world might end: evil nano-robots.

Could all-powerful robots bring about the end of the world?

Scientists discuss the probability and implications of an alien invasion.

Could super intelligent mutants spell doom for all mankind?

Scientists demonstrate a lab-sized version of a volcanic eruption - the kind that in real life, could spell doomsday for Earth.

Another way the world could end: a freezing, barren, blustery, frigid ice age.

Will the world end in nuclear holocaust brought on by mad scientists, crazed enemies, or computer-controlled warfare?

Will the end of the world be heralded by an unstoppable deadly plague?

NASA's Juno spacecraft will orbit Jupiter for about two years before scientists destroy it. They're destroying it in order to avoid contamination on Jupiter's moon Europa, which could have life.

Jupiter is the largest planet in our solar system, and it also spins the fastest.

Three new virtual reality headsets hit the market in 2016. Is this the year of VR content?

Scientists discuss the probability and implications of an alien invasion.

Astronaut Leland Melvin explains what life is like on the International Space Station, and what makes this #YearInSpace mission important.

What does it take for Wing in Ground technology to become more than a glorified water taxi? The future has arrived and it's found in fusion technology.

Could all-powerful robots bring about the end of the world?

Talk about a green technology! Algae fuel could completely revolutionize the transportation industry.

Stephen Hawking's ability to communicate was slowing down due to his disease, and a speaking aid was developed to help him talk.

Astronaut Leland Melvin explains why it's so important to promote early learning and curiosity to keep science and technology achievements like space exploration moving forward.

Who says physicists aren't funny? Stephen Hawking cracks some hilarious space jokes.

Centralia, Pennsylvania, used to be a busy mining town... but it disappeared in a puff of smoke. What happened?

Can you determine someone's gender just by looking at their brain?

Learn about the theories of today's most famous physicist Stephen Hawking.

Do you know what lies deep below New York’s Grand Central Terminal? Almost no one who passes through every day has any idea what is underneath their feet.

George Aldrich has a truly one-of-a-kind job, one he's held for nearly 40 years. He's a professional nose for NASA, sniffing everything that goes into space.

Fast food delivery man Rob Doyle doesn't just drive up to a front door and knock. He straps on scuba gear and dives deep to deliver pie to a hotel under the sea.

NASA's New Horizon captured this first-ever video of Pluto, and it looks "like stained glass".