The huge asteroid that hit Earth and wiped out the dinosaurs 66 million years ago was not alone, scientists have confirmed.
A second, smaller space rock smashed into the sea off the coast of West Africa creating a large crater during the same era.
It would have been a “catastrophic event”, the scientists said, causing a tsunami at least 800m high to tear across the Atlantic ocean.
They cannot date when it happened exactly, or say whether it came before or after the asteroid which left the 180km-wide Chicxulub crater in Mexico – the one that ended the reign of the dinosaurs.
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