00:03We all know that one of these is what took out the dinosaurs.
00:07But could it happen again? Experts have always believed that's a possibility.
00:10In fact, NASA's recent DART mission proved we were willing to spend $314 million to redirect one headed our way.
00:16But now, James Garvin, chief scientist at NASA's Goddard Space Flight Center, says
00:20he believes we've misread signs of some pretty serious asteroid strikes on our planet.
00:24Ones that have only occurred in the past million years,
00:27meaning our statistical chances of getting hit by a big one again are likely much higher than we ever thought.
00:32This is all because Earth, being such a wild place with water, weather and wind, is really good at hiding
00:36asteroid impacts.
00:37While the asteroid that killed the dinosaurs was a massive six-mile-wide life killer,
00:41much smaller asteroids can kick up enough dust to black out the sun for a couple of years.
00:45That would be enough to cause crops to die all over the world, leading to famine.
00:49Which is why Garvin and his team looked at high-resolution images of more recent impact craters from the last
00:54100,000 years,
00:55finding that some of the craters have indicators that they were much bigger.
00:58Extra faint rings exceeding the diameter of what we thought the asteroid would have been,
01:02have now been identified in four of them, effectively doubling or tripling their previously calculated size.
01:08With Garvin saying about these recalculations, it would be in the range of serious crap happening.
01:13How many people do not get hit by the
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