Canadian researchers who included specialists from surgeons to paleontologists have identified what they say is the first known cancer in a dinosaur. The conclusion not only sheds light on the history of what is still one of humanity's most feared diseases, but also hints at how the ancient lizards may have lived with — and protected — each other.

"Dinosaurs might seem like these mythical creatures, larger than life and powerful," said the Royal Ontario Museum's David Evans, one of the co-authors of a paper on the finding published in The Lancet.

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