2. Hell On Earth

Imagine: Earth is directly hit by a primordial black hole--and survives. But the strike is so immense that it generates a colossal shockwave, disturbing the magma beneath every existing volcanic system. An expert team of physicists and space scientists suggest this terrifying scenario is not all inconceivable. Explore the science behind this deadly disaster scenario to learn what would come of this destructive intrigue.

3. Frozen Earth

How to Survive the End of the World examines how the Earth would end if a catastrophic dark matter event in the solar system caused the planet to slowly move away from the Sun. The planet would freeze causing starvation and cold that would eventually kill a vast number of human beings. Some human beings, however, may live if they are able to tap geothermal energy.

4. Monster Storm

National Geographic examines what might happen if the earth's environmental balance shifts, triggering a magnitude of natural disasters that monopolize the entire globe.

5. Micro Monsters

Do amazing breakthroughs in technology bring terrifying new levels of danger to humanity? National Geographic explores this deadly question by delving into some of the dangers posed by one of the most promising new technologies: nano-robotics.

6. Flooded Earth

What are the consequences that flash floods and rising sea levels could have on global populations? How could we fight the rising tide? Is there hope for mankind to survive? Our ability to adapt may be our ultimate salvation.