Variation + Selection & Time
In our ever-changing world, a naturally occurring genetic difference in an individual can become an advantage or a fatal flaw in the struggle for survival. Those who live to reproduce pass their favorable genes to future generations. Certain characteristics become more or less prevalent over time as the group as a whole evolves.
CHANGE OVER TIME
Through the process of natural selection, ancestral life forms give rise to new species.
Scroll through the span of geologic time from the Earth's origin to the present day.
Fossils, embryos, and DNA teach us about the unity of life.
See when and where new characteristics evolved in the animal family tree.
Natural selection has generated a diverse collection of eyes, from simple to complex, that help animals sense their surroundings.
EVOLUTION IN ACTION
Leave the fossil record behind! Selection is happening now.
Watch the features in a population of fish evolve in response to pressure from a predator.
Explore an example of rapid evolutionary change.
Humans have been selecting for desirable traits in organisms throughout history.
Small changes in genes of a wild grass have yielded one of today's most vital crops.