5/7
Come on the clever sods!
Fancy marrying a lawyer! Who'd have thought it? How could anyone do that?
And I've been to the Gulf of Mexico and no one said anything about it being an asteroid crater. Who'd have thought it?
In Earth's modern history (meaning the time since complex life evolved on Earth), there have been five mass extinctions.
These "big five" are the
End Ordovician (roughly 440 million years ago), the
Late Devonian (roughly 365 million years ago), the
End Permian, or Permian-Triassic, (250 million years ago), the
End Triassic (210 million years ago), and the
Cretaceous-Tertiary (65 million years ago).
Scientists say they know roughly when each occurred, but figuring out what caused each one is another story.