A video investigating CAM plants and how they fix carbon at night. Learn how they minimize opening their stomata during to day to preserve water. [8:37]

Paul Andersen explains how natural selection is a major mechanism in evolution. The video begins with a discussion of Charles Darwin and the details of natural selection. The data of the peppered moth during the industrial revolution is...

Learn about some examples of how and why living things change because of changes in their environments. [4:36]

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

Why do some animals have much better night vision than others? We'll talk about new research tracing the root of improved night vision to the architecture of the DNA inside the photoreceptor rod cells of the animals' eyes.

A specific blend of fatty acids signal death or injury to a variety of animals, providing a warning to others of the species.

This lesson discusses how living things adapt to survive changing environments. It is 2 of 4 in the series titled "Organisms: Adaptations to Environment."

In this video, Paul Andersen defines adaptations and explains how organisms can become better adapted to there surroundings using the process of natural selection. Specific examples of adaptations, like coat color in rock pocket mice, as...