How vulnerable is the Earth to asteroid strikes?
October 20, 2013
Back from the printers!
December 10, 2013

How big would an asteroid have to be to cause a mass extinction?

The Chicxulub crater was caused by an asteroid hitting the earth approximately 65 million years ago. It was large enough to send a superheated cloud of gas and dust high into the Earth’s atmosphere and create worldwide Tsunami and earthquakes. The resulting gas and dust clouds blocked the sun’s rays, chilled the surface of the planet and led directly to the extinction of the dinosaurs.

But just how big was this global killer? Check the picture and see if you can spot it.

IRONHEART is published by Macmillan January 2nd 2014

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