Physicist Michio Kaku says an asteroid powerful enough to destroy nations is on a collision course with earth.
A much smaller one exploded just above Russia last week - its power was equal to 20 Hiroshima bombs.
Kaku says the nation-busting asteroid headed our way won't arrive until 2036, but it could make a direct hit with 1000 times more power - that's 20,000 Hiroshima bombs.
OutFront tonight: Bill Nye "The Science Guy" and former astronaut Rusty Schweickart.
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Erin Burnett OutFront airs weeknights at 7 p.m. ET. Designed to showcase Erin's unique style--casual, smart, and confident--OutFront stays ahead of the headlines, delivering a show that's in-depth and informative.
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