LIFE The Rise of Teotihuacán Yazan Hakan Gür 1 ay önce The city of Teotihuacán, which lay about 50 kilometers northeast of modern-day Mexico City, began
NATURE Extinction of the Dinosaurs Yazan Hakan Gür 1 ay önce Paleontologists have argued for a long time that the demise of the dinosaurs was caused
LIFE Layers of Social Class Yazan Hakan Gür 1 ay önce Taken together, income, occupation, and education are good measures of people’s social standing. Using a
NATURE Guyots Yazan Hakan Gür 1 ay önce In addition to the great mid-oceanic ridges and chains of volcanoes, there are other undersea
NATURE Galactic Clusters and Superclusters Yazan Hakan Gür 1 ay önce Galaxies are not evenly distributed throughout the universe. A few float alone like isolated islands
LIFE Social Readjustment Scales Yazan Hakan Gür 1 ay önce Holmes and Rahe (1967) developed the Social Readjustment Rating Scale (SRRS) to measure life change
NATURE Thermoregulation Yazan Hakan Gür 1 ay önce Mammals and birds generally maintain body temperature within a narrow range (36–38°C for most mammals
LIFE Beowulf Yazan Hakan Gür 1 ay önce Historical Background The epic poem Beowulf, written in Old English, is the earliest existing Germanic
NATURE The Origin of Cetaceans Yazan Hakan Gür 1 ay önce It should be obvious that cetaceans—whales, porpoises, and dolphins—are mammals. They breathe through lungs, not
HEALTH LIFE Aggression Yazan Hakan Gür 1 ay önce When one animal attacks another, it engages in the most obvious example of aggressive behavior.
