A tiny dinosaur bone just rewrote the origin of bird flight

ScienceDaily
Jul 24, 2025, 4:05 am25 pts
A tiny, overlooked wrist bone called the pisiform may have played a pivotal role in bird flight and it turns out it evolved far earlier than scientists thought. Fossils from bird-like dinosaurs in Mongolia reveal that this bone, once thought to vanish and reappear, was actually hiding in plain sight. Thanks to…

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