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And what makes it fine to unusual is that the terasaur bones, they're thin. They tend to be thin and very lightweight, much like a bird, and that helps them in flight. So it's really rare from them to be preserved with as much detail as this one was seen with. And by using high-resolution CT scans, scientists revealed layers of different deafening minerals. The mineral analysis showed microbial activity that drove the preservation process, steroid biomarkers, and collagen fiber patterns that tended to survive, stopping.