This lesson discusses how and why plants and animals adapt to their surroundings over time. It is 1 of 4 in the series titled "Speciation and Natural Selection."

This video will enrich studies of evolution by reviewing natural selection. [5:04]

In the last 3.8 billion years, life on Earth has evolved from single-celled prokaryotes to an array of life we have today. Find out about about Darwin, evolution, and natural selection. [15:05]

Hank guides us through the process of natural selection, the key mechanism of evolution. [12:45]

Do we have evidence of evolution happening now? Find out how birds may be developing shorter wings due to traffic collisions.

This video focuses on why human evolution matters including the impact of collective learning, natural selection, cultural evolution, adaptation, the ability of communication, and the use of brain power and its ability to build on prior...

A follow up to the evolution video with explanations of what better and success means in terms of evolution. Understand that modern day definitions of better and success differ from the evolutionary definition which means improved...

Paul Andersen describes microevolution and macroevolution in the stickleback fish of Loberg Lake. He describes how anadramous fish repopulated the lake after poisoning and adapted to the new environment through natural selection. He also...

In this video, Paul Andersen defines natural selection as differential reproductive success. He then explains how natural selection shapes organisms on our planet through variation and selection. A K-12 teaching progression is also...

This video looks at some common misconceptions that students can develop about natural selection, and how teachers can teach this topic effectively. [10:07]

Through video clips, demonstrations, and inquiry learn how the wing morph functions in the process of evolution. [0:29]

This simulation shows the spread of a favorable mutation through a population of pocket mice. Even a small selective advantage can lead to a rapid evolution of the population. [1:05]

Penn State University anthropologist Dr. Nina Jablonski walks us through the evidence that the different shades of skin color among human populations arose as adaptations to the intensity of ultraviolet radiation in different parts of...

See evolutionary biologist Jack Dumbacher explain how mathematical models can reconstruct the evolution of organisms. [1:38]

Darwin and Wallace are at the heart of understanding evolution and natural selection. Watch as Hank talks about their wonderful (if not seasick-inducing) trips around the world and how theories of evolution "evolved" through history....

This video addresses the topic of natural selection and misconceptions students may have that would lead to them not understanding the topic of evolution. [10:07]

How common is species extinction? Some is always happening. But over geologic time, biodiversity has increased despite several mass extinction events. Humans are now driving a mass extinction of biodiversity. [12:21]

Patterns and processes of evolution. How evolution and natural selection are reflected in the similarities and differences of organisms. [9:02]

Patterns and processes of evolution. How evolution and natural selection are reflected in the similarities and differences of organisms. [9:03]

How the "Owl Butterfly" may have gotten the spot on its wings. [13:29]

Introduction to how groups of organisms evolve and how natural selection can lead to evolution. [17:39]

This video from Kentucky's Last Great Places shows how the Green River has remained unusually clean and why it is home to several endangered aquatic species. [4:13]

This video from Nature offers a description of desirable traits in beef and dairy cattle. [2:55]

Learn how Charles Darwin became one of the most influential scientists of all time with this short biographical video. [3:38]