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"As scientists, we recognize the special nature of the impact crater, but it was also recognized by ancient inhabitants of ...
The Vredefort crater in South Africa ... Thomas Davison of Imperial College London ran computer simulations of an asteroid 7 kilometers wide crashing into an ice-covered Earth at 17 kilometers ...
An impactor--most likely an asteroid--hurtled toward Earth about two billion years ago, crashing into the planet near present-day Johannesburg, South Africa. The impactor formed Vredefort crater ...