The Apocalypse: What Would It Take?

The Apocalypse: What Would It Take?

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The Apocalypse: What Would It Take?

The Apocalypse: What Would It Take?

Mark A. Garlick/Harvard-Smithsonian Center for Astrophysics via

The first exoplanet was spotted in 1988. Since then more than 3,000 planets have been found outside our solar system, and it’s thought that around 20% of Sun-like stars have an Earth-like planet in their habitable zones. We don’t yet know if any of these host life – and we don’t know how life begins. But even if life does begin, would it survive?

Earth has undergone at least five mass extinctions in its history. It’s long been thought that an asteroid impact ended the dinosaurs. As a species, we are rightly concerned about events that could lead to our own elimination – climate change, nuclear war or disease could wipe us out. So it’s natural to wonder what it would take to eliminate all life on a planet.

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TECH|SCI

via RealClearScience http://ift.tt/VUc7dc

July 17, 2017 at 10:03PM

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