But something disturbed its peaceful existence — and triggered the evolution of wings ... first birds bloomed, they were hungry. They probably weren’t sharing the food of the giant cicadas ...

As the birds move off to another woodlot, their clucking calls can be heard as they sail overhead in a seemingly never-ending ...

If you ever sit in an airplane row overlooking a wing, then you probably notice multiple flaps along its edges that adjust during takeoffs and landings. Much like bird feathers, these components ...

It had feathered wings like living birds, but also had traits found in reptiles, such as teeth, claws and a long bony tail. Charles Darwin, who had published On the Origin of Species two years ...