Season 5 (2016)

Most Amazing Discoveries
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November 22, 2016 • 42m

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

Mystery of Planet 9
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November 29, 2016 • 42m

Scientists have discovered a mysterious ninth planet on the very edge of our solar system. Ten times the size of Earth, this stran...Read more

Black Holes: The Secret Origin
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December 6, 2016 • 42m

Recent discoveries could explain how supermassive black holes grow so big, one of the universe's most mysterious questions. Neithe...Read more

Secret History of Pluto
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January 3, 2017 • 42m

The first close-up images of Pluto revealed unimaginable secrets of this mysterious frozen world. Now, scientists investigate if P...Read more

Stars That Kill
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January 10, 2017 • 42m

The universe is home to real-life Death Stars that could destroy planet Earth. The latest science reveals the terrifying secrets o...Read more

The Universe's Deadliest
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January 17, 2017 • 42m

The universe is a dangerous place, and we explore the deadliest spots in the cosmos. Between earth and the edge of the universe, t...Read more

Life and Death on the Red Planet
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January 24, 2017 • 42m

Life once existed on Mars, but a series of devastating mass extinctions have made present-day life nearly impossible. The latest s...Read more

The Dark Matter Enigma
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January 31, 2017 • 42m

Dark matter is the biggest mystery of the cosmos. Scientists know that it has been vital to our universe since its birth, and new ...Read more

Strangest Alien Worlds
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February 7, 2017 • 42m

Discoveries of new planets have revealed countless worlds much stranger than Earth. Some of these worlds don't have stars, others ...Read more