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Evolution of the horse
The evolution in the structure of their teeth, odd-toed limbs, obvious mobility of the upper lip, and other aspects, joins the horse to the evolutionary line of odd-toed, hoofed mammals: the ... > more -
Great Ape language
Research into non-human Great Ape language has generated a great deal of evidence suggesting that apes are capable of using sophisticated communication with humans and other apes. Gorillas and ... > more -
Microorganism
A microorganism or microbe is an organism that is so small that it is microscopic (invisible to the naked eye). Microorganisms are often illustrated using single-celled, or unicellular organisms; ... > more -
Evolution of cetaceans
The cetaceans (whales, dolphins and porpoises) are descendants of land-living mammals, and remnants of their terrestrial origins can be found in the fact that they must breathe air from the surface; ... > more -
Evolutionary psychology
Evolutionary psychology is a theoretical approach to psychology that attempts to explain useful mental and psychological traits—such as memory, perception, or language—as adaptations, ... > more -
Natural selection
Natural selection is the phrase Charles Darwin used in 1859 for the process he proposed to explain the origin of species and their apparent adaptation to their environment. Along with the rules of ... > more -
Indigenous peoples of the Americas
The term indigenous peoples of the Americas encompasses the inhabitants of the Americas before the arrival of the European explorers in the 15th century, as well as many present-day ethnic groups who ... > more -
Frog zoology
About 400 million years ago, some members of the sarcopterygian group of fish moved onto land. These became the first amphibians. Today, these animals still spend part of their lives in water and ... > more -
Genetic drift
Genetic drift is the term used in population genetics to refer to the statistical drift over time of gene frequencies in a population due to random sampling effects in the formation of successive ... > more
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