Vivid Details of the Dinosaur-Killer Meteorite Impact Revealed

The Meteorite Impact: A Cataclysmic Event

What would it have been like to have lived through the meteorite impact that wiped out the dinosaurs 66m years ago? Writing in the Conversation, Michael Benton, of the University of Bristol, and Monica Grady, of the Open University, describe in vivid detail how it might have felt.

The Initial Blast and Its Immediate Effects

The first sign that something was amiss would have been a new star visible for about a week before the event. Upon its arrival, all living creatures near the impact site would have seen the bright fireball, heard its crackling noise and experienced a sonic boom before being swiftly incinerated.

The Global Devastation

Five minutes later, 100-metre-high mega tsunamis rolled across the Gulf of Mexico and, combined with the overheating, earthquakes, hurricanes and fires, wiped out everything within a 1,200-mile (2,000km) radius.

The Long-Term Consequences

Dinosaurs roaming forests on the other side of the world were still oblivious, but not for long. Within an hour, dust had circled the planet and skies had darkened. Within a day, global temperatures were dropping, and by the end of the week the world was 5C cooler. A ferocious winter lasted for more than a decade, eliminating about 75% of all species.

A Warning for the Future

Our ancestors were some of the lucky survivors but, sadly, Benton and Grady suggest our penchant for burning carbon is setting the scene for a similar scale of planetary catastrophe.