The Paleozoic era's Silurian period saw animals and plants finally emerge on land. But first there was a period of biological regrouping following the disastrous climax to the Ordovician.

Montana tribes offer guidance in response to federal ... in farewell note to Dallas fans after blockbuster trade The Silurian Hypothesis Suggests An Advanced Civilization Lived On Earth Before ...

From their colorful clothing to their legendary warrior bands, find out who the Kiowa are and why they continue to fight today.