Many people familiar with ideas on the early evolution of birds and of bird flight will know of the Proavis or proavian, a hypothetical bird ancestor illustrated and discussed by William Pycraft (1868-1942) in 1906 but made better known by Gerhard Heilmann (1859/1861-1946) during the 1910s and 20s.

By mapping gene expressions, researchers can determine some anatomical features of our distant hominin relatives

A 518-million-year-old wormlike marine creature found in modern-day China sported 30 legs and a spike-covered body.

As requested: A comparison of (some) Tyrannosaurus specimens. Peck's Rex is not included, pending an update. Specimens like Trix, Tristan and Samson are all eminently restorable, I just don't have infinite free time to do tyrannosaur skeletals. Enjoy!

A study of the movements of twelve species of extant, ground-dwelling bird is helping scientists to work out the locomotion of theropod dinosaurs.