< “It’s absolutely covered in really weird spikes and protrusions all over the back of the animal, including a bony collar that wraps around its neck and some sort of weapon on the end of its tail, so a most unusual dinosaur,” she said.
The discovery is so unusual that the two professors are considering whether the discovery might force a rethink of theories on how ankylosaurs evolved. >

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https://bbc.com/news/articles/c5y2emnnn4po