The re-examination of Scansoriopteryx – a sparrow-sized, pre-Archaeopteryx, bird-like creature that lived in what is today China during the Jurassic period, about 154 million years ago – challenges the widely accepted hypothesis that birds are derived from land-dwelling dinosaurs that gained the ability to fly. Scansoriopteryx, a hatchling. Image credit: Matt Martyniuk / CC BY-SA 3.0. Unearthed in Inner Mongolia in 2002, Scansoriopteryx...