Evolution is the process by which species change over time.

Charles Darwin proposed natural selection as a mechanism of evolution.

Traits that help survival are more likely to be passed on.

Fossils provide evidence of how life has changed.

All living things share a common ancestor.

Evolution explains the diversity of life on Earth.

Adaptations are traits that improve survival in an environment.

Genetic mutations contribute to variation in populations.

Speciation occurs when populations become different species.

Humans are part of the evolutionary tree of life.