The energy that went into making the impact crater is thought to be equivalent to 10 billion Hiroshima A-bombs, as BBC News explains. Nowhere to run/hide/escape.
Scientists who drilled into the impact crater associated with the demise of the dinosaurs summarised their findings so far in a BBC Two documentary on Monday.
The researchers recovered rocks from under the Gulf of Mexico that were hit by an asteroid 66 million years ago. The nature of this material records the details of the event.
It is becoming clear that the 15km-wide asteroid could not have hit a worse place on Earth.
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