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.

In a recent study nearly 600,000 healthy individuals were tested for genetic mutations that lead to severe childhood diseases but surprisingly, 13 participants tested positive but did not show signs of the associated disorders.

Scientists have identified three close exoplanets that could support life. The planets are a mere 40 light years away from Earth, orbiting a dim star.

Hyperloop One, a California-based company building a high speed transportation system, is one step closer to a full system test.

Scientists from the University of Groningen in the Netherlands studied microscopic organisms in 1,100 individuals and found that coffee, tea and wine were associated with a healthier gut.

Researchers at the University of Wollongong in Australia have uncovered fossilized bones in Indonesia suggesting a species of early humans disappeared 50,000 years ago.

A recent study of microbial data out of Indiana University showed that most of Earth's species remain undiscovered.

NASA is investigating Jupiter's moon, Europa, to explore if the satellite's chemical balance can support life.

Researchers from Italy have solved a longstanding mystery behind ancient stone spirals in southern Peru.

A police dashboard camera captured a large meteor lighting up the night sky in Portland, Maine recently.

The cracks on Pluto's moon Charon have perplexed scientists since their discovery. Theories have abounded but a new paper may have solved the mystery for good.

After difficulties with the first attempt to expand a new room on the International Space Station, NASA had little trouble with Bigelow Aerospace's inflatable module over the Memorial Day weekend.

Thanks to New Horizons, NASA just released the most detailed images of Pluto ever taken. Here's what it looks like.

2016 marks the 10-year anniversary of the Svalbard Global Seed Vault. This icy tomb is home to hundreds of thousands of samples that serve as a seed library, which helps preserve seed diversity as genetically-modified species become more prevalent.

In a recent study and for the first time ever, researchers improved the effectiveness of this natural killer by removing their inhibitor protein.

SpaceX CEO Elon Musk has revealed his plans to send humans to Mars by 2025, years ahead of NASA.

A device approved by the military, designed to stop bleeding, has just saved its first life.