What should we do if a 'planet-killer' asteroid takes aim at Earth?
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If a giant object looks like it's going to slam into Earth, humanity has a few options. A new guide could help NASA decide which one is best.What should we do if a 'planet-killer' asteroid takes aim at Earth?
If a giant object looks like it's going to slam into Earth, humanity has a few options. A new guide could help NASA decide which one is best. Read more