Nature
Image: Joschua Knüppe
Winter began in spring for many animals during the final year of the age of dinosaurs. Palaeontologists studying fossilized fish suggest that spring was in full bloom in the Northern Hemisphere when an asteroid slammed into Earth, triggering a devastating global winter and mass extinction.
But the conclusions are likely to stir controversy among some researchers, partly because the fossils come from Tanis, an extraordinary yet contentious geological site in North Dakota. Some were puzzled by the results, published in Nature on 23 February, which are essentially identical to those of a separate study published in Scientific Reports last December by another research group working at Tanis. Neither paper cites the other. Read more on the Nature website…
