Features such as fused bones were thought to be present ... and are integral to giving birds the strength and rigidity needed to fly,'' he explained. ''There seems to have been a lot of ...

Some, like penguins, have lost the ability to fly but retained their wings ... Airplane wings are modeled after bird wings. The bones and muscles of the wing are also highly specialized.

It's difficult to know what birds 'think' when they fly, but scientists in are getting some remarkable new insights by looking inside birds' heads. Evolutionary biologists and neuroscience researchers ...

Evidence of avian beginnings has been elusive in the fossil record because birds' light, hollow bones rapidly decompose. So far, the oldest-known bird fossil is the famous Archaeopteryx ...