Scientists believe that there is an undiscovered massive planet lurking at the edge of the solar system. Join researchers as they hunt for this mysterious world, an investigation that could reveal the secret history of the solar system's formation.

The most extreme stars in our universe could be the key to understanding life in the cosmos; these monster stars are among the oldest in the universe and can be hundreds of times larger than our Sun and burn over a million times brighter.

For decades, researchers have been scouring the universe for signals from extraterrestrials; new discoveries reveal mysterious fast radio bursts from space that may be the key to confirming life in the cosmos.