Approximate measurements of the Archeopteryx:

where it inhabited what is now Montana

giving it great ability to swim and maneuver in the water

about 115-108 million years ago

prehistoric version of the millipedes we know today

Psittacosaurus protegiendo puesta Amargasaurus Approximate measurements of the Archeopteryx:The Psittacosaurus is a genus of herbivorous dinosaur that lived during the early Cretaceous period, approximately 100 to 130 million years ago. It was an ornithischian dinosaur that belonged to the ceratopsid group, although it is often considered an early relative of the better known ceratopsians, such as Triceratops. Here is a description of the Psittacosaurus: Size and Appearance: Psittacosaurus was relatively small compared to other dinosaurs,