Page 41 - Everything You Know About Dinosaurs is Wrong

Because cold-blooded animals rely on the temperature around them to warm them up, it is very unusual to find them in chilly parts of the world. But we know that NANUQSAURUS lived and hunted where Alaska lies today, as well as the duck-billed hadrosaur EDMONTOSAURUS.
Although the Arctic wasn’t as cold as it is now, it was still much chillier than other parts of the Earth in the Cretaceous period, so being warm-blooded would have been a big help!
At the other end of the world, LEAELLYNASAURA was a small polar dinosaur that lived within the Antarctic Circle. It would have needed to survive long periods of darkness in the southern winter without any opportunity to heat up in the sun, and so must have been warm-blooded to heat itself!
Finding these dinosaurs living in colder places, as well as evidence of feathers and fast growth, has made many palaeontologists think that some dinosaurs, if not all of them, were warm-blooded . . . and wouldn’t have needed to lie out in the sun to catch those rays!
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