Frontiers explores new ideas in science, meeting the researchers who see the world through fresh eyes and challenge existing theories - as well as hearing from their critics. Many such developments create new ethical and moral questions and Frontiers is not afraid to consider these. radioscience@bbc.co.uk
For over 100 years the idea's been growing that birds are directly descended from dinosaurs. And today, most palaeontologists subscribe to that notion.
But there are dissenting voices taking issue with the prevailing orthodoxy. Do they have a point?
Well, there's no better place to settle the argument than Liaoning Province in North East China where an extraordinary series of wonderful fossil discoveries has been made.
Peter Evans visits the site to meet the palaeontolotists and to see beautifully-preserved specimens dating back over 120 million years.
Dr Zhou, Chinese Academy of Sciences
You can see several of the best Chinese finds at London's Natural History Museum. Their excellent state of preservation is revealing some dramatic secrets.
Most astonishing are the feathers or feather-like fuzz on primitive birds and on many of the dinosaurs.
Next week: Self Organisation - what we can learn from ants!
30 min
