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.

The key to the continuing future of the human race might just be the very sort of destruction that we fear here on earth.

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

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

In love with Science books? Well you've got nothing on Joanne who's in love with science compendiums.

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

Learn how to pitch a tent from a serious camping nerd.

Could super intelligent mutants spell doom for all mankind?

Dr. Michio Kaku explains why blowing up an asteroid that is heading towards Earth will do a lot of damage.

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

British comic book artist Dave Gibbons discusses the creative mind behind Watchmen and it's upcoming movie release.

Feel the explosions and the gunfire of your favorite video game with Forcefeedback Vest, a invention that could revolutionize your gaming experience.

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

On Discovery Channel's series, "The Matrix Saved My Life," how computer viruses work.

True love through spit? This new kind of party may sound gross, but it could help you find true love.

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.

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