American Chestnut Tree

This annotated slideshow adapted from KET's Electronic Field Trip to the Forest illustrates how blight decimated the American chestnut tree and the methods scientists use to identify and pollinate the remaining trees to create blight-resistant trees.

Ancient Farmers of the Amazon

This video segment from Evolution: "Evolutionary Arms Race" tells the story of the leafcutter ant and the fungus it farms -- an example of mutually beneficial symbiosis.

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Animal Defenses

In nature, survival is the name of the game. This video segment explores the world of animal defense and shows that predators don't always have the upper hand.

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The Birds and the Beaks

This Nature lesson explores different adaptations and variations in birds. It focuses on bird beaks, migratory patterns, and the ability of birds to co-exist with humans.

Build-a-Fish

In this interactive activity from Shedd Aquarium, build a fish and then release it into the reef to search for food and evade predators. Try different combinations and observe how each kind of fish has unique adaptations that help it survive in its habitat.

Carnivorous Plants of Cartwheel Bay

In this video segment from NatureScene, explore Cartwheel Bay, a wetland in South Carolina, and learn about the variety of carnivorous plants native to this unique landform.

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Coral Reef Connections

Dive in and explore what makes this beautiful world so fragile. In this Evolution Web feature, discover how coevolution has shaped the ecological relationships among reef creatures.

Evolutionary Arms Race

Students examine the interactions among different types of organisms and the importance of these relationships to the evolution of species.

Evolution of Camouflage

This video segment from Evolution: "Darwin's Dangerous Idea" illustrates the remarkable camouflage of a praying mantis against its leafy backdrop.

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Evolving Ideas: Who Was Charles Darwin?

This video from Evolution highlights Charles Darwin's personal struggle to bring to light his theory of evolution through natural selection.

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Floral Arrangements

Explore a few of the ways plants pollinate each other in this video segment from Sexual Encounters of a Floral Kind.

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Geneticist Pardis Sabeti

In this video profile adapted from NOVA scienceNOW, learn about geneticist and rock musician Pardis Sabeti, whose innovative insights into natural selection demonstrated how beneficial mutations spread quickly through a population.

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Homo Sapiens Versus Neanderthals

This video segment, adapted from NOVA, explores reasons why Homo sapiens had an advantage over Neanderthals in the pursuit of territory and natural resources.

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How Evolution Works

Students learn about natural selection, the mechanism that drives evolution.

Life in the Deep

Learn about some strange creatures that inhabit the deep oceans, including transparent sea cucumbers and oil eating tube worms, in this audio segment from PRI's The World Science Podcast.

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Masters of Disguise

In the face of danger, what's a spineless animal to do? This video segment introduces the concept of camouflage -- how animals achieve it and how this form of disguise benefits both predators and prey. Footage from NOVA: "Animal Impostors."

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Nowhere to Hide

Notice how the birds select orange or green bugs as you alter the levels of local pollution in this interactive activity from Kinetic City.

Sex and the Single Guppy

Play in our streams and see how exhibitionism has an evolutionary payoff in this Evolution simulation of Endler's experiment.

Tale of the Peacock

The peacock provides a classic example of sexual selection, the force behind nature's extravagances. From Evolution: "Why Sex?"

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Toxic Newts

The father and son team of Brodie and Brodie track down the predator able to stomach a mysteriously hyper-toxic newt, an example of an evolutionary arms race in action. From Evolution: "Evolutionary Arms Race."

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