in the 1980s, most scientists regarded Deinonychus as
a scaly dinosaur more reptilian in appearance than bird-like.
It would take nearly a quarter of a century to realize
that a live Deinonychus would have been covered in feathers.
This discovery has been a journey for Stephen and Sylvia
Czerkas who, as artists, created lifesize models representing
what scientists had thought Deinonychus could have looked
like. Decades later, Stephen's own research was the first
to reveal that smaller ancestors of Deinonychus were
not just feathered, but that they had wings and were
actually birds which had the ability to fly. Follow along
as Stephen and Sylvia transform their scaly dinosaur
into a prehistoric flightless bird.