What it is
Evolution is the process by which populations of organisms change over generations through natural selection and genetic variation.
How it works
Traits that improve survival and reproduction are more likely to be passed on.
Over long periods, this leads to gradual changes in species.
Why it matters
Evolution explains:
- The diversity of life on Earth
- How species adapt to environments
- The shared ancestry of all living organisms
Analogy
Evolution is not a straight line of progress.
It is a branching tree, where species diverge over time.
