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.

Ryan and Dani visit Vancouver to shoot various locations. The variable weather will make flying the drones challenging, but Dani is totally stoked.

To prepare for her first official race, Dani tries on FPV goggles that take her through the course before she goes hands-on with her drone.

Eight citizen scientists recently discovered a red dwarf star with a circumstellar disk - the type of place usually linked to young planets.

The team customizes a drone to carry special cameras and recognition software. It allows a shark researcher find and study sharks from the unique perspective of above water.

According to new research, sewage may be turned into bio crude oil that could be used as fuel.

This time the drones are turned on Dani as she tries flyboarding for the first time. See incredible footage of her being propelled skyward on a massive jet of water.

A true hero. We will never forget you.

Scientists say they have found a connection betwen full moons and large quakes around the world.

At the nanolevel, water freezes when it should boil.

Scientists have found a way to take out as much as 40% of the sugar in their chocolate bars without changing their taste.

CERN's Large Hadron Collider is the biggest particle hunting machine ever built! Beams of particles collide in a detector named Atlas. These collisions trigger an enormous amount of data which is then decoded by Atlas.

NASA’s Cassini spacecraft just beamed back the first images of Saturn’s atmosphere since it began its new ring-grazing mission phase.

For the past two years, Rosetta has been studying Comet67P. It’s discovered some surprising things about comets.

Engineers have developed the most agile jumping robot ever. Dubbed Salto, the 10-inch tall robot could be helpful in future search and rescue missions.

Most comets that we know of live in one of two places, the Oort Cloud or the Kuiper Belt.

The sun’s atmosphere, known as the corona, is millions of degrees hotter than its surface, and scientists may have figured out why. A NASA spacecraft found evidence of “heat bombs” collectively heating up the atmosphere.