This documentary looks at what could happen were a comet to smash into the Earth, as has happened on occasion in the past. The story is quite grim, but part 2 has some hope. Just one of many reasons to prepare for civilization-ending calamities.
This documentary looks at what could happen were a comet to smash into the Earth, as has happened on occasion in the past. The story is quite grim, but part 2 has some hope. Just one of many reasons to prepare for civilization-ending calamities.