In Jan­uary 2017, Earth nearly col­lided with an as­ter­oid, which passed closer than the Moon. Now, NASA aims to use sharper tele­scopes and launch probes with nu­clear war­heads to pre­vent the night­mare from com­ing true.

Science Illustrated - - CONTENTS -

The pos­si­bil­ity of a big rock­ing smash­ing into Earth isn’t sci­ence fic­tion. It will hap­pen, some day. How should we re­spond?

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