Principles of generosity and prosperity inform the selection of the last two crew members: Christopher Sembroski, a former member of the U.S. Air Force who served in Iraq and now works as a Lockheed Martin engineer, and Sian Proctor, a professor of geosciences and two-time NASA astronaut candidate. Excitement for the flight ramps up, but anxiety lingers.

The Rosetta mission was a ground-breaking expedition to land on a comet for the first time, the 67P/Churyumov-Gerasimenko comet. The Rosetta mission tries to answer our most fundamental questions and to change our understanding of the cosmos forever. Special access reveals what this cutting-edge journey discovered and how these mysterious objects helped create life on Earth.

Ed performs with childhood hero Eminem and shares his new music publicly for the first time. The third episode switches gears and looks more at Ed’s high points in his career

There's a killer lurking in our galaxy, a star ready to explode into a supernova. Seen from Earth, a supernova in the Milky Wave would have a terrible beauty. But for us, it could be fatal. In a few seconds, it can release as much energy as the sun will over its entire lifetime. It could be anywhere. It is nearly impossible to predict where and when the next supernova will happen. The hunt is on to find the next supernova before it finds us.

Described as one of the most influential female boxers of all time, helping legitimize women’s participation in the sport, Christy Martin shocked the world by becoming a superstar after winning a blood-soaked undercard match at the Mike Tyson/Frank Bruno fight in 1996.
After her meteoric rise, the film breaks down Christy’s incredible fight for survival both in and out of the ring as she battled substance abuse, domestic violence and a harrowing brush with death. We also see Christy’s struggle with her sexual orientation and her journey of self-discovery. This is a story stranger than fiction, that must be seen to be believed.

In astronomy, we've been looking at different kinds of light and opening up the universe a little bit more of the time. But then in 2015, the roof came off. Something happened that changed everything, the ability to see waves in space and time itself. Gravitational waves help us roll back the clock to the dawn of time, discover epic cosmic collisions, on make Earth-shaking discoveries. Gravitational waves are the biggest game changer since the invention of the telescope. We have a completely new universe to view now. A new exploration of space is just beginning.