Putting feet in mud shows “dinosaurs and birds are different.” A study reported in Nature vol. 399, pp103-104, 141-144 comparing fossil dinosaur footprints with those produced by present day birds running through mud, showed that birds run by moving their knees, with little movement of the hip and ankle and keep their ankles off the ground even in soft mud. Fossil prints show that Dinosaur ankles sank into the ground when running, confirming previous studies of dinosaur bones which suggest they ran using their hips and ankles.

Editorial Comment: Watch this space for more differences between birds and dinosaurs as the evidence builds up to show they aren’t even related.

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