Currently, we have identified only a very small percentage of the millions of celestial objects that could potentially collide with Earth. Is there a plan to keep track of all these dangerous projectiles? | For more, visit www.sciencechannel.com/#mkcpgn=ytsci1 Watch full episodes! | play.google.com/store/tv/show/Man_v_The_Universe?id=31tMOKZvT24 Subscribe to Science Channel! | www.youtube.com/subscription_center?add_user=sciencechannel Check out SCI2 for infinitely awesome science videos. Every day. | bit.ly/SCI2YT Download the TestTube app! | testu.be/1ndmmMq

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