The crest is a very bizarre-looking structure. I actually had a chance to see the fossil last summer in China while they were working on it. It's remarkably well preserved. And it has this strangely open triangular structure that flares a little bit at the back. Very delicate.

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It's certainly an intriguing idea. The problem, though, is that when you have only one incidence you really don't know what's going on.

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These claws are pretty big for an animal this size.

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