Origin of avian flight Reference Libraries
Microraptor, meaning “small thief,” is a genus of dromaeosaurid dinosaur from the Early Cretaceous Period (120 million years ago). This small, four-winged animal was first discovered in the Jiufotang Formation in Liaoning, China, with more than two dozen specimens unearthed. There are two known species of Microraptor. The type species, M. zhaoianus, has been hotly debated for years. It...
- The navel or umbilicus.
- In Greek archaeology: A central boss, as on a shield, a bowl, etc.