The end of the dinosaurs appears to have come in springtime
The End Of The Dinosaurs Appears To Have Come In Springtime. Fish fossils from North Dakota suggest when an Earth-devastating asteroid hit off Mexico. The Chicxulub asteroid impact off the coast of Mexico occurred about 66 million years ago. It triggered devastating flooding at a site in North Dakota (illustrated). This dino-killing impact took place in spring, data now suggest. JOSCHUA KNÜPPE By Sid Perkins About 66 million years ago, a massive asteroid slammed into the Gulf of Mexico. Not long afterward, all nonbird dinosaurs died as did many other species on land and in the sea. Scientists don’t know the exact year this took place. But they now think they have figured out in what season it occurred: spring. The finding comes from a new analysis of bones. These fossils of ancient fish had been entombed at a site in southwestern North Dakota. It’s known as Tanis. The asteroid was big — some 10 kilometers (more than 6 miles) across. It struck with a mighty force off the Mexican
