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Asked by anon-353446 on 30 Mar 2023.
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Martin McCoustra answered on 30 Mar 2023:
What killed the dinosaur was the impact of a massive asteroid just off the east coast of Mexico 63 million years ago. While a large area around the impact zone was incinerated, the real effect that killed off the dinosaurs was something called a nuclear winter. This dust and sulfate aerosol in the stratosphere reduced the amount of sunlight that got to the surface and the temperature began to drop. Less sunlight and lower temperatures killed off many food plants. In turn, plant eating dinosaurs had nothing to eat so they started to die off… with plant eating dinosaurs dying off the meat eating dinosaurs had nothing to eat either and so the dinosaurs disappeared from our planet.
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Graeme Dykes answered on 30 Mar 2023:
Pretty sure we would die without atoms in the air. Don’t think that they killed the dinosaurs as such.
A large explosion or eruption puts a lot of dust into the air and that affects the climate but dust is much larger than just atoms.
It’s hard to find a place without atoms. Even in deep Space there are always a few
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