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.

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.

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

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.

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.

Is a zombie apocalypse simply a concept of fiction or could an infectious disease really turn humanity into a race of vicious, seething monsters? National Geographic examines one all-too-real scenario--a pandemic caused by a mutated rabies virus. Experts from the fields of medicine, biology and the social sciences explain what could happen if humanity faced a deadly contagion for which there was no cure--and the truth will shock you.