Early Horses

The Impact Origin of Lunar Craters

Predicting Volcanic Eruptions

The Pit Organs of Snakes

Conditions on Earth When Life Began

Dealing with Extreme Cold

Evolution of the Flowering Plants

Elements of Life

Memphis: United Egypt’s First Capital

Speciation in Geographically Isolated Populations

Groundwater

Survival of Plants and Animals in Desert Conditions

Discovering the Ice Ages

The Geologic History of the Mediterranean

Variations in the Climate

William Smith

Timberline Vegetation on Mountains