Theory of evolution

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Table of Contents (click to expand)What Is Evolution?What Is Orthogenesis?How Much Does Orthogenetic Theory Get Wrong?A Final WordThe short answer is no. Not all evolutionary change needs to be a response to external selection pressures. They can also just be random or neutral in nature. Very often, evolution is branched, so there is no one straight line.When we think of evolution, many of us think of this famous picture:However, this picture, which depicts the evolution of man, may actually…

Theory of Evolution. Edited by Shaira Real for our Bio PT

Evolution Theory

Earlier this month, an online petition voicing scientific opposition to Charles Darwin’s theory of evolution reached more than 1,000 signatures, pointing to an increased consensus among the scientific community.

Charles Darwin and Alfred Russel Wallace's theory explains how evolution occurs. Individuals naturally vary in traits in a population. With limited resources, competition exists in which those better adapted - with beneficial traits suited to the environment - are more likely to obtain resources, survive, reproduce, and pass traits to offspring over successive generations. This natural selection of advantageous traits leads species to evolve over time.

Human evolution infographics with development stages from single cell to homo sapiens on white background vector illustration

Hominid Skulls

About 10,000 years ago, the climate began to warm up, resulting in the extinction of many of the large animals (megafauna) of the Quaternary Period. Only a few smaller representatives of the megafauna remain, such as African elephants, rhinoceroses, and hippopotamuses. Scientists are skeptical as to whether the warming climate is to blame for the extinction at the end of the last ice age or the fact that modern humans were beginning to rapidly spread around the globe and hunt these…