How Big Does an Asteroid Need to Be to End Humanity?

How Big Does an Asteroid Need to Be to End Humanity?

From city-destroyers to planet-sterilizers, scientists are tracking the asteroids that could one day threaten all life on Earth and developing the technology to prevent them from doing so.

While small space rocks burn up in our atmosphere every day, scientists are tracking the larger ones that pose a genuine threat. An impact from a “medium” asteroid like Bennu could trigger a global winter, but what would it take to cause total extinction? From mile-wide asteroids creating mega-tsunamis to planet-sterilizing comets that could boil the oceans, this is the science behind an apocalyptic impact.

Related Posts