Mars: it's our neighbour and potentially one of our next stop in the solar system But why go? How do we get there? And is there life on the red planet? Later, we reveal a desert that may hold the key to one day living on Mars!

Emily Calandrelli, aerospace expert and former NASA employee, visits research institutes and NASA's astronaut facilities to unlock the mysteries of space.

With the solar system full of danger, somebody has to lead the way. Enter the robots. These robots can lift, draw, drive, and there are a few you can wear. We're going to the extremes and bringing a few friends along with us.

We pose one of science's ultimate questions, are we alone in the universe? We'll discover the best places to look for life and see the array of technology that is eaves dropping on the universe.

Asteroids and their potential impact on Earth; an asteroid may have killed off the dinosaurs; the Chelyabinsk meteor of 2013; predicting impact size on the moon and the Earth; valuable materials in asteroids.

Creating and testing high-altitude balloons to survive the rigours of near space; a balloon lifts an 8,000-pound telescope to the edge of space and discovers something amazing; a dramatic search-and-rescue mission.