Episodes
Earth is hit by 100 tons of rock from space every day; most burn up in the atmosphere, but a single rock wiped out the ...read more Earth is hit by 100 tons of rock from space every day; most burn up in the atmosphere, but a single rock wiped out the dinosaurs. show less
When a massive star dies, it can direct a blast of radiation that could obliterate all life.
More than 100 million pieces of small space debris are floating around the Earth; a collision between two of these objects in ...read more More than 100 million pieces of small space debris are floating around the Earth; a collision between two of these objects in low Earth orbit could be catastrophic. show less
Aliens could be lethal killers who want to invade and plunder our world; a team of experts investigate extra-terrestrial beings ...read more Aliens could be lethal killers who want to invade and plunder our world; a team of experts investigate extra-terrestrial beings and their threat to human life. show less
Until recently, black holes were only theoretical; scientists know that millions exist and some of them have the potential to be ...read more Until recently, black holes were only theoretical; scientists know that millions exist and some of them have the potential to be lethal to earth. show less