How the Universe Works: Season 5

From the furthest reaches of space to our own cosmic backyard, we count down the discoveries that changed everything we know about our universe.

Scientists have discovered a mysterious ninth planet on the very edge of our solar system. Ten times the size of Earth, this strange world could have moons with extraterrestrial life.

The question in every galaxy and super anomaly students and viewers minds are how do black holes grow so massive. For every possible solution, there exists a different cause. The study continues.

Astronomers discovered a host of other icy objects orbiting around Pluto. Renewed interest was piqued, especially after a New Horizons probe took some high-resolution photos of Pluto in 2015.

The universe is home to real-life Death Stars that could destroy planet Earth. The latest science reveals the terrifying secrets of NASA's six deadliest: vampire stars, supernovas that can vaporize a planet, and unpredictable stars gone rogue.

The ultimate guide to the worst places in the universe. There is Betelgeuse in its death throes and could become a supernova and the possibly a death star. Chuck, the crash-test dummy will be sent on travels to other deadly events,

Life on Mars went through a series of life impacting events and the first impact may have seeded life on earth by debris from Mars..

Dark matter is the biggest mystery of the cosmos. Scientists know that it has been vital to the universe since its birth, new discoveries reveal that it could create black holes, cause mass extinctions, and might even have helped to shape life on the Earth. Might there be a dark matter universe that may account for all the events that aren't really definable? This is all pure speculation and if's.

Discoveries of new planets have revealed countless worlds much stranger than Earth. Some of these strange worlds don't have stars, others are made out of diamonds. Will we ever find a planet like Earth, or are these distant worlds stranger than fiction?