Bring up aliens and a lot of people will scoff. But not everyone is laughing. Around the turn of the century, 3.8 million ...

The Turquoise Pool is one of Mystery Cave’s most photographed features, and for good reason. This body of water is so clear ...

One of the most photographed features in Mystery Cave is the Turquoise Pool, a body of water so clear and so perfectly ...

Declassified documents released in 2013 during Obama’s presidency acknowledged the existence of Area 51, saying that the secret government space was used as an aerial testing ground for U.S.

Trump said he'd direct agencies to begin sourcing and "releasing government files related to alien and extraterrestrial life." ...

Mars presents one of the strangest sights in the solar system: a blue-tinted Sun setting against a red sky. This episode explains the physics behind this eerie phenomenon, from fine dust particles to ...

We've tried this intimate space thriller for the first time, with good graphics, a very personal story and a mystery to solve.

Step inside a dazzling fantasy world full of magical creatures, meet a boy struggling with big family changes, share laughter ...

Discover the most otherworldly slot canyons in Utah, ranked for their dramatic scenery, unique geology and surreal atmosphere ...

This twist — that 3I/ATLAS' outer layers have been baked by the sun — does not derail our mission. It just makes the science ...

Deep in the Atlantic Ocean, far from any coastline and out of reach of sunlight, scientists have mapped a sprawling undersea landscape that looks uncannily like a ghostly metropolis. Towering spires, ...