When NASA spots a something on Mars that resembles Stonehenge, they investigate what could have made this strange structure. Scientists discover a mysterious hole in Saturn's rings. An ancient tribe claims contact with alien visitors.

When the Soviet Union unveils its own space shuttle, the CIA hatches a secret revenge plot. Recent discoveries shed new light on the destruction of Sodom and Gomorrah. A missing nuclear weapon could threaten a NASA base in the Arctic.

The last humans to walk on the Moon discover something strange on the surface. A NASA scientist investigates a strange phenomenon responsible for horrific mass deaths. A landmark NASA mission threatens to destroy the reputation of an American hero.

A mysterious object is orbiting Saturn, and it looks just like the Death Star. New evidence might shed new light on the mysterious death of Yuri Gagarin, the first man in space. When a cuting-edge satellite vanishes, fears of a space war escalate.

When NASA discovers something strange on Saturn's biggest moon, experts investigate if aliens feeding on the electric atmosphere could be the culprit. The disturbing evidence points to a grisly apocalypse if these monsters ever make it to Earth.

When NASA begins a strange experiment to communicate with dolphins, experts investigate if it's a prelude to making alien contact. But some fear that such a discovery could have apocalyptic consequences.

Are you a space buff? Join host Joanna Hausmann and test your skills and knowledge with this quiz about Apollo 13, long distance probe communication, and laser beacons. Plus a little bit of fun!

Getting out of Earth's atmosphere is no easy feat, but neither is answering these questions. Quiz yourself on Goddard's first flight, Atlas V's propulsion systems, and the journey to Mars. Ready to liftoff?

Space travel is all well and good, but returning home to Earth provides another set of problems. Get ready to be quizzed about Yuri Gagarin's crash landing, cutting-edge shuttlecraft, and orbital space flight. Your quiz starts now...

What would happen if we got a message from space? How would we react? Scientists and sci-fi writers, with cooperation from SETI and Carl Sagan's son, Nick, unravel the impact of this world changing event, forming an intriguing hypothetical scenario

How will humans react when an alien spacecraft is on its way to Earth? Will humans learn from aliens, or become colonial subjects? Scientists and sci-fi writers, with cooperation from SETI and Carl Sagan's son, Nick, unravel the impact.

The Arrival has ended. A swarm of small spacecraft depart their huge mothership, and hover in our atmosphere. The ships open their hatches, and deposit thousands of mysterious pods on the earth’s surface. Are they a message, a gift or a weapon?

A mothership the size of Texas is hovering over Earth and we're tired of waiting. We send a rover to explore, and what we find makes us question the definition of life. On Earth, the pods multiply, making contact with them unavoidable.

Go beneath the surface to understand forest fires, car exhaust, and the space station.

Discover the secrets behind the family car, titanium, and letters.

Find out the secrets behind nuclear subs, crash test dummies, and growing fruits and vegetables.