sff - asteroid impacts

Some big lumps have hit the earth ...
Chicxulub crater in Mexico was from the impact of 10km [6miles] sized asteroid, about 66 million years ago - and caused the mass extinction of dinosaurs [except the ancestors of current avian species] and a lot other organisms - animals, plants and marine life.
en.wikipedia.org/wiki/Chicxulub_crater
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not my image : fair use & public information