if a astriod hit the earth would all humans become extinct – I'm a Scientist 2024/25

Question: if a astriod hit the earth would all humans become extinct
- Keywords:
  asteroid,
  Earth,
  human,
  space
Asked by yaps520scut on 3 Mar 2025.
- Martin McCoustra answered on 3 Mar 2025:
  
  It depends on the size of the asteroid! One only a few km wide hit the Earth in the Gulf of Mexico 63 million years ago and wiped out the dinosaurs.

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