Do UFOs and aliens really exist? Opinions are divided on this question. But many people are firmly convinced that extraterrestrials do exist. Eyewitnesses all over the world repeatedly observe unexplained phenomena and capture them on camera. Do these videos show flying saucers, drones, and satellites? And what's the story behind a piece of metal discovered in New Mexico? Does the object come from another world? In this series, experts separate fact from fiction. The specialists conduct research, evaluate alleged pieces of evidence using scientific methods, and provide meaningful answers.

Could there be life beyond our planet? Extraordinary NASA footage and ground-breaking interviews with astronauts and scientists investigate potential sightings of UFOs.

This trip is no joyful nudist holiday, and the protagonists of this documentary series simply don't have time to feel ashamed about their lack of clothing. They have much bigger problems to contend with. This is a matter of sheer survival! Randomly paired couples who have never met before must survive 21 days in the most inhospitable regions of the world – without equipment or food supplies. Due to the dangers they face on these survival trips, the lack of clothing quickly becomes a minor issue. On the Yucatán Peninsula, in the jungles of Nicaragua, and in the Smoky Mountains, entirely different things take priority. Here, the naked couples not only have to find food and clean drinking water – they also have to contend with wild animals: aggressive big cats, poisonous spiders, and hungry bears make life difficult for the adventurers.

This trip is no joyful nudist holiday, and the protagonists of this documentary series simply don't have time to feel ashamed about their lack of clothing. They have much bigger problems to contend with. This is a matter of sheer survival! Randomly paired couples who have never met before must survive 21 days in the most inhospitable regions of the world – without equipment or food supplies. Due to the dangers they face on these survival trips, the lack of clothing quickly becomes a minor issue. On the Yucatán Peninsula, in the jungles of Nicaragua, and in the Smoky Mountains, entirely different things take priority. Here, the naked couples not only have to find food and clean drinking water – they also have to contend with wild animals: aggressive big cats, poisonous spiders, and hungry bears make life difficult for the adventurers.

Andy built an empire out of a junkyard, but when business booms he risks losing his grip. Plus, problems with his race-car threaten to turn into a headache.

Josh Gates links up with his childhood hero, William Shatner, to enter shark-infested waters to understand the nature of fear and come face-to-face with an apex predator.

Do UFOs and aliens really exist? Opinions are divided on this question. But many people are firmly convinced that extraterrestrials do exist. Eyewitnesses all over the world repeatedly observe unexplained phenomena and capture them on camera. Do these videos show flying saucers, drones, and satellites? And what's the story behind a piece of metal discovered in New Mexico? Does the object come from another world? In this series, experts separate fact from fiction. The specialists conduct research, evaluate alleged pieces of evidence using scientific methods, and provide meaningful answers.

Modern day treasure hunter Drew Pritchard travels the length and breadth of the country in search of weird and wonderful objects. The bigger the hoard, the happier he is.

Modern day treasure hunter Drew Pritchard travels the length and breadth of the country in search of weird and wonderful objects. The bigger the hoard, the happier he is.