The Four-Winged Dinosaur: Surprising fossils from northeastern China spur a debate over how birds evolved.
The Producer's Story

The Producer's Story
Mark Davis has been tracking the controversial case of the flying dinosaur for almost 20 years.

Fossils of the Cretaceous

Fossils of the
Cretaceous

See the perfectly preserved fossils of plants and animals that lived alongside feathered dinosaurs.

Built to Fly

Built to Fly
Compare the anatomy of the oldest known bird and its dinosaur cousins.

Wind Tunnel Test

Wind Tunnel Test
How did Microraptor use its second pair of wings to glide? See for yourself in this virtual experiment.

Video Extra

Video Extra
Watch another flight test of the Microraptor model.

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ExxonMobil, David H. Koch, HHMI, CPB
ExxonMobil HHMI CPB Alfred P. Sloan Foundation National Science Foundation National Endowment for the Humanities