Reconstructions of the fossil somewhat resemble a modern wading bird
, the story of the birds becomes clearer. It is now well established that modern birds, the Neornithes, are actually a relict group of dinosaurs which survived a cosmic collision, 66m years ago, between Earth and an asteroid or comet. This impact wiped out the rest of the Dinosauria, along with a lot of other creatures.
This particular rock interested palaeontologists because it included visible leg bones that looked as though they belonged to a bird. Late Cretaceous bird fossils are rare, so instead of chancing their arms by using physical or chemical methods to explore the rock for more remains, Daniel Field of Cambridge University and his colleagues employed computerised tomography, a process more familiar to most people as a medical-scanning technique.
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