One Strange Rock

For Earth's astronauts looking down from space, planet Earth is set apart from all other observed planets because of its thin blue line.

A look at Earth's birth in a cosmic storm, and the planet's existence as a result of random collisions in a turbulent cosmos, constructed from what's left over of an early solar system.

A look at the Earth's battle with the sun, as the sun hurls devastating particles and radiation at Earth, and how Earth wouldn't survive without its numerous shields.

Explores how life on Earth began through the combination of crazy coincidences and dynamic forces that ruled the universe; an investigation into whether life could exist anywhere else.

It's not enough for Earth to be habitable, it also has to be lethal for life to thrive. Death is hardwired into everything, from our cells to the planet itself.

Astronaut Chris Hadfield suggests a space colony is the only way to ensure humanity's survival, an undertaking made difficult by micro gravity, space radiation and bacteria.