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.

A team of astronomers used simulation models to conclude that Proxima b may be an ocean planet, with liquid water spanning its entire surface.

NASA's Cassini spacecraft has begun a series of daring dives through Saturn's rings, the first step in the probe's "grand finale" investigation of the gas giant planet.

Many modern concretes can succumb to the elements in just 20 years, but this special mixture can last over 2,000 years. Gypsum and lime were used as binders, and the mixture commonly solidified underwater.

DNews explains how nanotechnology could soon be used to harvest the sun's energy through our homes' windows - without us even seeing it. That's a renewable energy win!

Scientists are engineering a robot ‘snake’ that can easily maneuver into hard-to-reach places, such as inside the human body.

Turns out the more you lie, the less you feel guilty about it. After observing fMRI scans, scientists saw the amygdala, the region of the brain associated with emotion, light up when research participants were in scenarios where lying was beneficial.

Why do we have so many remotes? We've got a lesson in how remote controls work and why you probably have more than one. Throw in the Internet of Things however, and that could all change.

Sounds simple - heat triggers a system of overhead tubes to drop water and douse a fire. The principle may be simple, but they can still be set up to respond to very different environments and fire threats.

NASA’s MAVEN spacecraft has returned hundreds of incredible ultraviolet images of Mars’ "night glow."

On December 5, 1945 Flight 19 left Florida for a low level bombing exercise and were never seen again. Radio transmissions suggest the pilots became unexplainably lost and crashed, but no wreckage has ever been found.

Scientists have found frozen water just under the surface on Mars. It’s about the same volume as Lake Superior.

For decades people have claimed that ships will strangely disappear in the Bermuda Triangle area. While some want to believe there's some sort of supernatural force, scientists think methane may be the culprit.

The planet nearest to our sun is shrinking. In September, NASA’s MESSENGER spacecraft sent back results that suggested Mercury was tectonically active, like Earth.

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

Perineal ice in our Arctic is so thick it should withstand the hot summers of our planet for up to 9 years. However, NASA’s animation showcases that perineal ice has continuously declined over the past 3 decades and now only 5% is left. 

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.