1杀伤性小行星
65 Million Years ago, an asteroid impact caused a cascade of catastrophes that led to the downfall of the dinosaurs, but what would happen if the same size space rock struck near the same spot again? How would modern humans cope with a hailstorm of falling rocks and debris, mega tsunamis, out of control fires, blast-furnace temperatures, and a destroyed ozone layer? In the wake of worldwide destruction, who would survive...and who would perish?
2黑洞
Human civilization is under attack from a catastrophic–but unseen–threat from space. A supermassive black hole is moving toward Earth at almost the speed of light. As this celestial killer approaches our planet, its enormous gravitational forces trigger earthquakes, volcanic eruptions, and tsunamis larger than any the world has ever seen.