Chemical Risks to a Fetus

Learn about the risks environmental contaminants pose for a developing fetus, in this video adapted from Contaminated Without Consent.

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Chemist and Biologist Catherine Drennan

In this video produced for Teachers' Domain, learn about MIT professor Cathy Drennan's research into microorganisms that remove carbon dioxide, a greenhouse gas, from the atmosphere.

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Chicken Waste and Water Pollution

In this video segment adapted from FRONTLINE: “Poisoned Waters,” learn how unregulated waste from large-scale chicken farms contributes to water pollution.

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Chimp Politics

In this video from the PBS series The Human Spark, host Alan Alda and scientist Franz de Waal observe and compare two alpha-male chimpanzees’ different approaches to sharing at the Yerkes National Primate Research Center in Atlanta.

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Choosing Foods for Your Health

This resource includes two video segments adapted from Living With MyType2 and features diabetic teenagers Misty and Tim explaining how they carefully choose the foods they eat.

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City Farm

In this interactive game from WGBH, players learn about sustainable practices by growing crops, protecting them against unforeseen problems, and determining how best to conserve resources.

Climate and Human Evolution

In this video segment adapted from NOVA: "Becoming Human," learn how the analysis of rock layers and ocean sediments supports the theory that rapid climate change may have jump-started human evolution two million years ago.

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Climate Change Threatens Pacific Paradise

Learn how climate change has impacted food and freshwater resources on the Carteret Islands of Papua New Guinea, in these two videos adapted from UNU-IAS Traditional Knowledge Initiative and Pacific Black Box, Inc.

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Collapse of Sharks

This video segment from Nature shows the destructiveness of the shark fin and shark cartilage industries.

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Colorful Creatures

For animals, bright, flashy coloration can serve as a warning or as an invitation. Either way, colorful skin, feathers, and scales yell, "Notice me!" This collection of images shows examples of some of the world's most colorful creatures.

Comets Bombard the Early Earth

Visualize how comets carrying chemicals necessary for life could have made their way to Earth billions of years ago in this video segment adapted from NOVA.

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Comets Deliver Amino Acids to Earth

Amino acids, essential ingredients for life, may have been delivered to Earth by comets billions of years ago, as visualized in this video segment adapted from NOVA.

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The Common Genetic Code

Paul Nurse describes his research that showed that humans share some genes with organisms as different from us as simple brewer's yeast. Footage from Secret of Life: "Immortal Thread."

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Compare the Poles

Explore the defining features of the Arctic and the Antarctic in this interactive activity adapted from the Woods Hole Oceanographic Institution.

Conserving a Unique Ecosystem in Micronesia

Learn about the steps that the people of Kosrae, Micronesia, are taking to protect their natural resources, in this video adapted from the Micronesia Conservation Trust.

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Contaminants in the Arctic Food Chain

The levels of contaminants found in particular animals vary widely depending on where they fit into the Arctic food chain, as described in this video segment adapted from LOKE Films and the Arctic Monitoring and Assessment Programme.

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Contaminants in the Arctic Human Population

In this video segment adapted from LOKE Films and the Arctic Monitoring and Assessment Programme, learn how human populations in the Arctic are affected by industrial contaminants in the food chain.

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Contaminating the Rockies

Learn how abandoned mines have been contaminating water supplies in the Rocky Mountains for decades in this video segment adapted from NOVA: "Poison in the Rockies."

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Continental Divide: The Breakup of Pangaea

Examine geological evidence found in fossils, rock deposits, and ancient mountains that supports the theory of continental drift in this interactive activity adapted from the Exploratorium.

Converting to Biodiesel

Meet a college student whose class project to turn cooking grease into diesel fuel resulted in converting bus fleets to biodiesel, in this video from Earth Island Institute's New Leaders Initiative.

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Cooperation Over Competition

In this video from The Human Spark, scientists discuss what may be the uniquely “human spark” which separates us from animals: our ability to communicate, cooperate, and collaborate with others.

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Coral Kid

In this video segment, ZOOM guest Cassie takes us on a tour of the coral reef near her home in Key Largo, Florida, and points out some of its unique features.

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Coral Reefs

This video segment from Nature explores the unique status of Cuba’s coral reefs.

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The Costs and Benefits of Treating Gene Defects

In this video excerpt from NOVA, find out how whole genome sequencing saved the life of Alexis, a fraternal twin who was originally diagnosed with cerebral palsy but, in fact, had an even rarer genetic condition.

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Cow's Eye Dissection

In this interactive activity adapted from the Exploratorium, watch videos of a cow eye dissection and see how an eye works.

A Cow’s Digestive System

Learn how a cow eats and digests food in this video segment from Nature.

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Create a DNA Fingerprint

Learn DNA profiling, the technique police use to catch the guilty and free the innocent. From NOVA: "The Killer's Trail" Web site.

Crime Scene Investigation

This video segment from IdahoPTV's D4K explores the tools and forensic science that crime scene investigators use to collect evidence to help solve crimes, and study animals, archaeology and paleontology.

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Dance of Development

Watch the "dance" of development as a zebrafish egg divides and differentiates on its way to becoming an embryo in this interactive activity adapted from the Exploratorium.

A Day in the Life of a Neanderthal

In this video segment from The Human Spark, host Alan Alda looks at some of the similarities and differences between the Neanderthal way of life and that of modern humans.

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Decision-Maker Bees and the Human Brain

Learn about the similarity between the pattern of communication within a bee colony and neural networks in the human brain, in this video adapted from NOVA scienceNOW.

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Dengue Virus Invades a Cell

In this visualization adapted from the University of Massachusetts Medical School, discover the role that dengue viral proteins play in a human cell as the virus prepares to replicate.

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Desert Biome

This video segment from NOVA: "A Desert Place" describes the physical characteristics and organisms that define the desert biome.

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Desert Habitat

This video segment from IdahoPTV's D4K defines warm and cold (high) deserts, and describes some of the plants and animals found there as well as their adaptations for living in each type of desert.

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Desert Tortoise

This video segment from Outdoor Nevada examines threats to the desert tortoise population.

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Desirable Breeding Traits in Cattle

This video from Nature offers a description of desirable traits in beef and dairy cattle.

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Destructive Forces

In this video segment from Nature, scientists question how animals mysteriously survive natural disasters.

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The Developing Brain

This video from The Human Spark illustrates the difference between the brain growth of man’s early ancestors and today’s modern infant.

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Different Breeds of Cattle

In this video segment from Nature, learn about six different breeds of cattle.

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Dinosaurs

This video segment from IdahoPTV's D4K shows us what paleontologists think dinosaurs looked like, what they ate, and why they might have disappeared. We see paleontologists at work studying dinosaurs fossils.

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Discovering Antarctica

Take a guided tour of Antarctica by watching brief video segments of its landscape and wildlife in this interactive activity adapted from the British Antarctic Survey.

The Discovery of Penicillin

This video segment adapted from A Science Odyssey tells the story of researcher Sir Alexander Fleming, whose luck and scientific reasoning led to the groundbreaking discovery of penicillin.

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Diversity of Hardwoods at Congaree Swamp

In this video segment from NatureScene, observe some methods of plant identification with regards to the diversity of hardwoods at the Congaree Swamp.

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DNA Detective

In this video from QUEST, learn about the issues of ethics and responsibility that are associated with genetic testing.

DNA Extraction

This interactive activity adapted from the University of Nebraska's Plant and Soil Sciences eLibrary illustrates how DNA, which is normally locked inside of cells, is extracted from living tissue.

DNA Libraries

This interactive resource adapted from the Dolan DNA Learning Center explores the different types of DNA libraries used to store and access genetic information.

DNA Separation Lab in the Classroom and in Real-World Research

This video produced by WGBH features students in the Amgen-Bruce Wallace Biotechnology Lab Program preparing a recombinant DNA molecule, and examines how this work relates to the way real-life scientists approach similar work.

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DNA Sequencing

This interactive activity adapted from the Dolan DNA Learning Center looks at two techniques used to sequence DNA: the Sanger method and an automated process based on the Sanger method.

Documenting Glacial Change

This collection of comparative glacier images adapted from the National Snow and Ice Data Center shows substantial changes in five Alaskan glacier positions over periods of 60 to 100 years.

Dolly Garza: A Tlingit and Haida Scientist

In this interactive resource adapted from Raven Radio/KCAW, listen to biologist Dr. Dolly Garza as she explores the sea otter population of Sitka, Alaska, from the perspectives of her tribal heritage and her Western education.

Dolphin Reproductive Behavior

This video segment from the Science and Technology Chat series focuses on dolphin pregnancy, birth, and care of the young, and features Atlantic bottlenose dolphins living in captivity at the Mirage Resort Dolphin Habitat.

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Dragonflies in Kentucky

This KET video segment from Kentucky Life explains the differences between dragonflies and damselflies and explores their habitats.

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Dustin Madden: Science Teacher

In this video profile produced for Teachers' Domain, meet teacher Dustin Madden, an Iñupiaq who hopes to inspire students to take an active role in protecting the natural environment by giving them a foundation in math and science.

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Eating Healthy Foods

In this video adapted from Media That Matters, students explain how healthy foods help your body and processed foods can harm it.

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Ecology

This video segment from IdahoPTV's D4K defines ecology and ecosystems and explains how all living and non-living things in an ecosystem interact and depend on the energy of the sun.

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The Effects of Pesticides on Children

Follow anthropologist Elizabeth Guillette as she studies the effects of pesticides on children in a farming community in Mexico, in this video segment adapted from Playing with Poison.

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Electronic Gadgets

Two kids learn some surprising facts about the parts in their computer game, in this animated video from LOOP SCOOPS.

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Electrophoresis and Gel Analysis

In this animation produced by WGBH and Digizyme, Inc., see how molecules of DNA are separated using gel electrophoresis, and how this process enables scientists to compare the molecular variations of two or more DNA samples.

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Elk

This video segment from IdahoPTV's D4K describes the yearly life cycle of elk and follows them from their winter habitat to their summer habitat and back.

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Eluting Red Fluorescent Protein From the Column

This video produced by WGBH demonstrates how to properly elute a red fluorescent protein after it has been bound in a chromatography column.

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Endangered Species

This video segment from IdahoPTV's D4K explores the many reasons why animals become endangered or become extinct.

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Endocrine Disruptor Hypothesis

Scientists discuss whether or not endocrine disrupting chemicals, which may cause birth defects and other health concerns, should be controlled in the absence of conclusive proof, in this video segment adapted from FRONTLINE: "Fooling with Nature."

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Energy Flow

This feature, adapted from Interactive NOVA: "Earth," follows the path of energy as it is transferred via the food chain from one type of organism to another.

Energy Flow in the Coral Reef Ecosystem

This video segment, adapted from NOVA, describes the energy flow in a coral reef, including its food web.

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Engineering Biofuels

In this video segment adapted from KQED's QUEST, find out how synthetic biologists use the techniques of metabolic engineering and directed evolution to make more effective biofuels.

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Environmental Hazards on the Farm

This interactive activity adapted from the National Library of Medicine identifies health hazards found on farms.

Environmental Hazards at the Coast

This interactive activity adapted from the National Library of Medicine identifies environmental health hazards in coastal areas.

Environmental Hazards in the City

This interactive activity adapted from the National Library of Medicine identifies environmental health hazards in a typical urban or suburban community.

Environmentalist Bill McKibben, 1990

In this 1990 archival news footage from Cambridge Community Television, environmentalist Bill McKibben speaks about the possible effects of climate change at an Earth Day celebration in Cambridge, MA.

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Environmental Justice: Opposing Industrial Hog Farming

Learn about the impact that large-scale hog farming has had on one minority community in North Carolina and how residents fought back to protect their water supply and property, in this video segment adapted from Earthkeeping: "Toxic Racism."

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Environmental Justice: Opposing a Toxic Waste Incinerator

In this video segment adapted from Earthkeeping: "Toxic Racism," learn how farm workers and farm owners formed a rare alliance in an effort to block the use of an incinerator in their Latino community by suing a major corporation for environmental discrimination.

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Environmental Justice: Opposing a Toxic Waste Landfill

This video segment adapted from Earthkeeping: “Toxic Racism” talks about the early days of the environmental justice movement and how the health of minority communities can be compromised by the disproportionate numbers of hazardous waste facilities located there.

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Environmental Justice in Dallas

Follow a Dallas community's fight to receive federal Superfund status to clean up the damage from a high-polluting lead smelter, in this video segment adapted from Earthkeeping: "Toxic Racism."

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Epigenetics

In this video segment adapted from NOVA scienceNOW, learn how what you eat, drink, or smoke may affect the instructions your epigenomes send to your genes, and as a result, change how your DNA is expressed.

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Eradicating Malaria with DDT

Learn about the role of the controversial chemical DDT in the worldwide malaria eradication program, and hear from an expert who advocates bringing it back, in this video segment adapted from Rx for Survival.

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Ethanol Biofuel

In this video segment adapted from NOVA, learn about one scientist's idea for using biotechnology to make ethanol a more efficient alternative to gasoline.

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The Ethics of Preimplantation Genetic Diagnosis

In this video excerpt from NOVA, learn about the advantages, disadvantages, and ethical implications of preimplantation genetic diagnosis, or PGD, a technique used to screen embryos created through in vitro fertilization for diseases.

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An Everglades Visit

In this adapted video segment, ZOOM guest Tommy takes us on a tour of the Florida Everglades. He describes what makes a wetland biome unique, including the soil, precipitation, and biodiversity.

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Look At Me Now

Children go through countless physical changes during the first year of their life. Look At Me Now, an original KET interactive, depicts a year in the life of a baby through photos, and highlights the changes we experience while growing.

What Do You Get From That?

Children learn how farm animals contribute to people’s lives by providing food for the table and clothes to keep them warm.

Zoo Safari

Take a trip to a zoo and learn more about some of our favorite animals.

Evolutionary Roots of Language

This video excerpt from NOVA scienceNOW looks at how language and tool-making may have coevolved.

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Exploring Tidepools

In this interactive activity adapted from the National Park Service, learn about tidepools and then try to identify the organisms that live there.

Extreme Measures

This video adapted from Nature describes efforts to protect salmon by killing or relocating species that prey on salmon.

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Factory Farms and Organic Alternatives

In this video adapted from the series Race to Save the Planet, learn how agricultural pesticides can help increase the amount of food produced, but can also damage soil and wildlife in the process. See how organic farming addresses some of these challenges.

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Falconry

This video segment from IdahoPTV's D4K defines falconry and shows some of the equipment used for training a falcon to hunt.

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The Falls of the Ohio

This video from KET examines one of the largest exposed fossil beds in the world, found at the Falls of the Ohio River, near Louisville, Kentucky.

Farm Nitrates in the Water Supply

Learn how nitrate runoff from farm fertilizers can negatively impact human health and how a water treatment plant is tackling the challenge, in this video excerpted from Big River.

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Farm Solutions to Water Pollution

In this KET video from Common Ground and Cleaner Water, Tribby Vice, a Kentucky farmer, talks about the changes he has made on his farm to protect the water quality of the stream running through his property and the watershed in which he lives.

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Feasting on the Salmon Run

This video from Nature focuses on the annual “salmon run,” when brown bears descend on Alaska’s rivers to fish in rivers teeming with salmon swimming upstream to spawn.

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Feeding Time

In this video from Nature, watch how ravens’ smarts can be observed in many situations, such as when they hunt and store food.

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Fever!

This video describes the role of the brain in regulating body temperature and how sometimes fever is employed to fight off infection.

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Field Biology

This video segment from the teacher video series Learning That Works uses a case study to highlight the effectiveness of a project-based, real-world approach to teaching science.

Fishing for Safe Food

This interactive game adapted from the U.S. Environmental Protection Agency is a fun way to learn which types of fish contain low levels of mercury and are safe to eat and which contain high levels and should be avoided.

Fish Research

This video segment from IdahoPTV's D4K explains the Chinook salmon's life cycle in the Pacific Northwest and why it is an endangered species. A fisheries biologist takes students through some steps of fish research with explanations of the kinds of information biologists gather to perhaps help manage fish recovery.

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Fledglings

Witness eaglets begin to fly in this video segment from Nature.

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Flood Plain and Higher Ground Habitats

This video segment from NatureScene features the area of the Congaree Swamp where the high ground and the flood plain meet. Learn how a few feet of difference in elevation on a floodplain can yield drastic changes in what you’ll find living there.

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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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Climate Wisconsin: Fly Fishing

Learn how fly fishing and trout are impacted by Wisconsin’s changing climate in this multimedia video produced by the Wisconsin Educational Communications Board.

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Food Is Fuel

This video excerpt from NOVA scienceNOW examines the energy and nutrient content of a cupcake and a rat.

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