In 1859, Charles Darwin’s theory of evolution was postulated in “On the Origin of Species.” In this theory, Darwin suggested that evolution occurred gradually, although there were no complete fossils.

When Aristotle claimed that humans differ from other animals because they have the ability to be rational, he understood rational to mean that we could form our views and beliefs based on evidence, ...

Natural selection has long been considered the driving force behind human evolution. But a landmark study of 87 fossil skulls spanning the past two million years suggests the story is far more complex ...