Archaeopteryx, discovered in 1961, has long been considered one of the earliest birds in the fossil record. But its position on the evolutionary tree is debated because, despite having feathered ...

Now, a rare and spectacularly preserved fossil of this creature, known as Archaeopteryx, goes on display Tuesday at the Field Museum in Chicago. These dinosaurs combined the bony tail and clawed ...

So far, the oldest-known bird fossil is the famous Archaeopteryx lithographica, discovered in 1861 just two years after the publication of Darwin's On the Origin of Species, but Archaeopteryx ...