Evolution & Origins of Life
The history of life from abiogenesis to modern biodiversity — natural selection, speciation, and the tree of life.
Origins of Life on Earth
From prebiotic chemistry to the first living cells
Darwin's Theory of Evolution
Natural selection and the origin of species
Evidence for Evolution
Fossils DNA comparative anatomy and biogeography
Natural Selection Explained
How environmental pressures drive adaptation
Speciation and Species Formation
How new species arise through reproductive isolation
Genetic Drift and Gene Flow
Random changes and migration in evolution
Adaptive Radiation
How species diversify rapidly to fill ecological niches
Convergent and Divergent Evolution
When unrelated species evolve similar traits
Coevolution — When Species Evolve Together
Mutual evolutionary influences between interacting species
Mass Extinctions Through Earth History
The five great extinctions and their lasting impact
The Tree of Life
Mapping evolutionary relationships across all living things
Human Evolution
From early hominids to Homo sapiens
The Evolution of Flight
How insects birds and bats independently evolved flight
Sexual Selection and Mating
How mate choice drives evolution of elaborate traits
Evolution in Action — Modern Examples
Observable evolution in bacteria insects and wildlife today