Tracking killer comets before they strike – Video

Video Link: https://www.youtube.com/watch?v=4MWkoaV-3BQ

Tracking killer comets before they strike
It #39;s only a matter of time before a big comet or asteroid is on a collision course with Earth. Will scientists discover it, and be able to do something about it, ahead of time? Science corresponden...

By: PBS NewsHour

Originally posted here:

Tracking killer comets before they strike - Video

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