What is evolution and how does it work? Evolution 101 provides the nuts-and-bolts on the patterns and mechanisms of evolution. You can explore the following sections:

This definition encompasses everything from small-scale evolution (for example, changes in the frequency of different gene versions in a population from one generation to the next) to large …

Nov 29, 2025 · Evo in the News Is this iguana an invader? Evolution has answers Posted November 29, 2025 The vine twining on the fence, the insect crawling over the sidewalk, and …

Menu Home Evolution 101 An introduction to evolution: what is evolution and how does it work? The history of life: looking at the patterns – Change over time and shared ancestors …

[Mechanisms of evolution: Grades 13-16] Natural selection is capable of acting at multiple hierarchical levels: on genes, on cells, on individuals, on populations, on species, and on …

Teach your students about human evolution: It's all in your head: An investigation of human ancestry, a classroom activity for grades 9-12. Find additional lessons, activities, videos, and …

Many disciplines within biology (and many basic biology texts) have come to depend on evolutionary trees. Get the basics you need to understand and interpret these key diagrams.

You will also find a timeline of evolutionary history and information on some specific events in the history of life: human evolution and the origin of life.

At the heart of evolutionary theory are the basic ideas that life has changed over time and that different species share common ancestors. Overwhelming evidence supports these facts.

Just as in microevolution, basic evolutionary mechanisms like mutation, migration, genetic drift, and natural selection are at work and can help explain many large-scale patterns in the history …