Jurassic Period, the geologic name given to the middle period of the Mesozoic Era, between the Triassic and the Cretaceous periods. The Jurassic period began about 200,000,000 years ago and lasted about 65,000,000 years. The name Jurassic is derived from the Jura Mountains, where rocks formed during this period are found. In the United States, outcrops of rocks of the Jurassic period are found only west of the Mississippi River. Most of the rocks of this period are marine deposits (shale, sandstone, and limestone) containing a large number and variety of fossils. Dinosaurs and flying reptiles lived during this period and the first known birds appeared.
Anthropologists specialize in, well, us. But studying humankind doesn't mean you have to hole up in a library or laboratory. Take a peek at this article to learn more about the dynamic, enriching field of anthropology.
Countless movies and television shows depict quicksand as some kind of living creature that sucks its victims down into a bottomless pit, never to be heard from again. Well, you can't believe everything Hollywood tells you.