00:00A 10-kilometer asteroid wouldn't just destroy a city, it would turn Earth's surface into a
00:05planetary furnace. The impact vaporizes rock, blasting molten debris beyond the atmosphere.
00:12Minutes later, that debris begins falling across the entire planet. The sky ignites.
00:18Forests burn. Oceans boil near the impact zone. Then billions of tons of dust swallow the sun.
00:24Daylight disappears, and global temperatures begin collapsing. Crops die. Plankton vanishes.
00:31The food chain tears itself apart. Acid rain poisons what survived the firestorms and freezing
00:38darkness. We track most known giant asteroids, but long-period comets can arrive with far less
00:44warning. And somewhere beyond our telescopes, another extinction may already be falling toward us.
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