Vredefort Crater impact 2.02 billion years ago tilted part of Earth's crust, Sudbury Basin 1.85 billion years ago melted massive volume of Earth's crust. Chicxulub Event 66 million years ago wiped out 75% of species and Popigai Crater created world's largest known diamond field 35.7 million years ago. Tunguska Event 118 years ago is largest impact in recorded human history.