Cum ar putea veni sfârşitul lumii?  Stephen Petranek enumeră provocările cu care ne confruntăm în dorinţa de a perpetua rasa umană.  Vom fi şterşi de pe faţa Pământului de un asteroid?  Se va prăbuşi ecosistemul?  Va scăpa de sub control un accelerator de particule?

Stephen Petranek:  Numărătoarea inversă către Armageddon.

Civilization faces a surprising array of threats, from asteroid impacts to ecosystem collapse and even rogue black holes. In the last century alone, a 200-foot comet flattened 100 miles of Siberian forest, and one in five people on the planet now suffers from clinical depression. While science can spot danger ahead, denial and lack of preparation leave humanity vulnerable. Proactive investment and bold solutions could turn potential disasters into solvable challenges.

Ignoring Existential Risks Is Humanity’s Biggest Mistake

*How We'll Live on Mars*

Watch: 8 more ways the world could suddenly end (in 2013)

Infographic: How we'll live on Mars

Why The Martian’s Andy Weir loves Mars -- but doesn’t want to go there

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TED Stage Talk

Stephen Petranek: Stephen Petranek:  Numărătoarea inversă către Armageddon.