A variety of cosmic events have both helpful and harmful effects on life on Earth. From the beauty of the Aurora Borealis and rainbows to the dangers of UV radiation and cosmic rays, from the miracle of photosynthesis to the thrill of a meteor shower, this episode explores how the effects generated by the sun and other extra-solar sources can literally get under our skin, scramble our technology, make life possible and threaten our existence all at the same time

Right now cosmic forces prowl the universe and threaten man's very existence. They're asteroids and comets; they've left their imprint on planet Earth, literally. Initially helping to build planets through violent collisions, during this fiery bombardment period they may have even seeded Earth with water and the building blocks for life. Since the turbulent formation of the solar system, these space rocks have continued to impact Earth. Some have been so violent that they've led to mass extinctions, including one that wiped out the dinosaur. New theories suggest that asteroid and comet dust harbour deadly viruses that may have triggered some of our worst pandemics. The possibility of future collisions remains a legitimate threat yet despite their dangers, asteroids and comets may hold vital natural resources, which could actually preserve

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 space travel there is a saying that the first 50 miles and the last 50 miles are the most dangerous. Explore the controlled explosion of launch, the fiery crucible of re-entry and everything in between. See how a single spark inside a spacecraft or a micrometeoroid less than an inch wide hitting a space station can turn a routine mission into a lethal nightmare. As the missions become longer, venturing to Mars and beyond, the potential disasters will only become bigger. What would happen if a spacecraft ventured too close to a black hole or was hit by a gamma ray burst?

The question of our human origins is one of the most controversial science has wrestled with. This is the story of how scientists came to explain the beauty and diversity of life on earth, and reveal how its evolution is connected to the long and violent history of our planet. Featuring ocean adventurers, eccentric French aristocrats, mountain climbers, a secret Victorian publisher with 12 fingers, a ridiculed German meteorologist, and only a brief hint of Charles Darwin.

Chris Lintott and Maggie Aderin-Pocock report on the reaction to the dramatic announcement of the discovery of phosphine gas in the clouds of Venus, a gas that could be a sign of life. Venus remains an inhospitable and unlikely host. But if not Venus, where in the solar system is the best place to look for alien life? Chris and Maggie investigate the latest missions to Mars and the icy moons of Jupiter and Saturn. Away from the search for life, Pete Lawrencepreviews the best meteor showers of the year.