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.

This video segment from NOVA: "Animal Imposters" shows the lightning-fast strike of the anglerfish.

It takes a thick skin to withstand the hardships that life has to offer. This collection of images shows a variety of animals, each with a slightly different type of protective covering.

This video segment adapted from NOVA explains why ice sheets move. To find out how fast they move, scientists carve a tunnel through a glacier.

What would happen if a portion of the Antarctic Ice Sheet were to melt? This video segment adapted from NOVA uses animations to show the effect of a 6-meter sea-level rise on coastal cities across the world.

What happens when the ground under your feet is ice and it's moving? This video segment adapted from NOVA features some of the dangers faced by scientists conducting research in Antarctica.

This video segment adapted from NOVA uses microwave images to reveal how sea ice doubles the size of Antarctica each winter. Rare footage shows how sea ice crushed the famous ship Endurance in 1914.

This video segment from Between the Lions is an original, animated retelling of the classic Aesops fable in which a grasshopper sings and dances while the ants gather food for winter. The grasshopper then has nothing to eat once the cold weather comes. In the end, the ants invite the grasshopper inside for a meal, and they all dance a merry mambo. Featured "m" words include: many, moons, moody, Murray, Marge, merry, Melanie, mangos, melons, mambo, music, moving, mushrooms, macaroni, managed, milk, Myrtle, mind, middle, month, mountains, melt, meanwhile, munched, moment, make, move, motioned, meatballs, mashed potatoes, magnificent, and meal. This video segment provides a resource for Fluency, Phonemic Awareness, Phonics, Letter Knowledge Awareness, and Phonological Awareness. ***Access to Teacher's Domain content now requires free login to PBS Learning Media.

This video segment adapted from Building Big illustrates the strength of the arch in bridge design and construction.

See the many birds that spend their summer in the Arctic in this video segment from Nature.

This video segment from Wild Europe: "Wild Arctic" explores the struggle for survival in one of Earth's most extreme environments.

This video segment adapted from NOVA features a variety of scientific perspectives on the age old question, "Are we alone in the universe?" Animations make vivid the improbability that we could intercept a radio wave signaling extra terrestrial intelligence.

The CyberSquad tries to figure out a table arrangement for 20 workers in this video from Cyberchase.

In this video segment from Cyberchase, Matt tries for a second time to arrange tables and chairs to accommodate 20 workers.

Matt's third table arrangement helps fit all 20 workers at five tables in this video segment from Cyberchase.

This video segment explores the benefits and pitfalls of cloning as a means of reproduction. From Evolution: "Why Sex?"

Explore some of the wonders of modern engineering in this video from the Sciencenter in Ithaca, New York. Hear a diverse selection of engineers explain how things work.

This Wide Angle video segment illustrates Islamic and secular elements of life in Turkey, and introduces Mustafa Kemal Ataturk, the first president of Turkey, and his reforms.

In this feature, adapted from Interactive NOVA: "Earth," students explore the relationship between oxygen concentration and the well-being of various organisms by simulating a change in oxygen levels and observing what happens.

In this interactive activity from ChemThink, take a closer look at atomic structure, properties, and behaviors.