Evolution 101
Evolution 101 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: An …
Understanding Evolution – Your one-stop source for information …
Oct 3, 2025 · Activity: Plant on a Rampage! Plant on a Rampage: Evolutionary scientists to the rescue!
Natural Selection - Understanding Evolution
Natural selection is one of the basic mechanisms of evolution, along with mutation, migration, and genetic drift. Darwin’s grand idea of evolution by natural selection is relatively simple but often …
The history of life: looking at the patterns - Understanding Evolution
Here, you can explore how evolutionary change and evolutionary relationships are represented in “family trees,” how these trees are constructed, and how this knowledge affects biological …
Lines of Evidence - Understanding Evolution
Scientists continue to argue about details of evolution, but the question of whether or not different species are related through a long, shared history was answered in the affirmative at least two …
Biogeography - Understanding Evolution
The distribution of species on Earth provides evidence that informs our understanding of both the evolution of life and the movement of continents across the globe via plate tectonics.
An introduction to evolution
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 …
Homologies: Vestigial structures - Understanding Evolution
Evolution best explains the existence of dewclaws. These now vestigial features were inherited from ancestors with a larger number of functional digits. Claws on bird wings. As chicks, …
The origin of birds - Understanding Evolution
When paleontologists built evolutionary trees to study the question, they were even more convinced. The birds are simply a twig on the dinosaurs’ branch of the tree of life. As birds …
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 articles that focus on human evolution.