A city-size asteroid or comet is thought to have killed the dinosaurs 66 million years ago.

The impact, called the Chicxulub event, released unfathomable quantities of dust and gas, rapidly cooling the entire planet.

The angle of impact was recently recalculated, and computer models suggest that means the event led to a global cooling disaster far worse than previously estimated.

Fighters may prefer to land straight-on punches, but when it comes to asteroid and comets, scientists are discovering that angled strikes can be far more dangerous.

The dinosaurs had a rough go of it when a rogue space rock the size of a city struck Earth 66 million years ago, near what is now the city of Chicxulub on Mexico's Yucatan Peninsula.

Until recently, researchers thought the asteroid or comet hit nearly straight down at a 90-degree angle, but recent drilling expeditions at Chicxulub crater, at the bottom of the Gulf of Mexico, suggest it happened at a more stilted 60-degree angle.

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