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Browse results: Earth's History

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RESOURCE	GRADE LEVEL	MEDIA TYPE
Caves: Extreme Conditions for Life This video segment adapted from NOVA raises the provocative idea that if life can exist in the most extreme environments on Earth — such as in dark, toxic caves — then perhaps living things can also survive in harsh environments on other planets. Accessibility features: Audio Description, Caption	6-12	Video
Climate Change Impacts Alaska Glaciers This video adapted from KTOO takes a look at Earth's warming and cooling cycles and the current atypical trend of warming that is impacting the glaciers in Alaska's Inside Passage. Accessibility features: Caption	6-12	Video
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. Accessibility features: Caption	6-12	Video
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. Accessibility features: Caption	6-12	Video
Diatoms Measure Climate Change In this video segment adapted from NOVA: "Becoming Human," learn what the analysis of fossilized microscopic algae in sediment tells us about rapid changes in climate in Africa's past. Accessibility features: Caption	6-12	Video
Drilling to Antarctica’s Rock Core In this video adapted from ANDRILL, find out how geoscientists get through more than a dozen football fields of ice and water in order to study the rock and sediment beneath Antarctica. Accessibility features: Caption	3-8	Video
Earthquakes: The Prehistoric Record In this video segment adapted from NOVA, a geologist digs a trench along the San Andreas Fault to reveal three thousand years of earthquake history. Information from the layers of sediment may help geologists to predict earthquakes. Accessibility features: Caption	3-12	Video
Field Research on Glacial Change In this video segment produced by ThinkTV, learn how scientists take measurements in the field to gain an overall understanding of changes in local water supplies, and how they may relate to changes in the mass of nearby glaciers. Accessibility features: Caption	6-12	Video
Geology of Death Valley This video segment from NatureScene examines the landforms of Death Valley and how they came to be. Accessibility features: Caption	3-8	Video
Geology of North Dakota Badlands See how the geology of the North Dakota badlands has changed over time in this video segment from NatureScene, featuring the landscape at Theodore Roosevelt National Park. Accessibility features: Caption	3-8	Video
The Grand Canyon: Ancient Mountains This video segment adapted from NOVA features the twisted and melted forms of the Grand Canyon's oldest rocks, the 1.7-billion-year-old Vishnu Schist. Accessibility features: Caption	6-12	Video
The Grand Canyon: How It Formed This video segment adapted from NOVA uses animation to present the theory of how the Grand Canyon was formed and features rare footage of a phenomenon known as debris flow. Accessibility features: Caption	3-12	Video
The Grand Canyon: Its Youngest Rocks This video segment adapted from NOVA features the youngest rock formations in the Grand Canyon, lava dams, and how they are subject to the eroding power of water. Accessibility features: Caption	6-12	Video
The Grand Canyon: The Top Two Rock Layers This brief video segment adapted from NOVA uses illustrations and the well-preserved footprints of a small reptile to portray the history of the Grand Canyon's top two rock layers. Accessibility features: Caption	3-12	Video
High Altitude Glaciers in the Tropics While it may seem like a contradiction, glaciers do exist in the tropical latitudes. In this video produced by ThinkTV, learn about tropical glaciers and why scientists are studying them to better understand global climate change. Accessibility features: Caption	6-12	Video
How The Ohio River Was Formed This video segment adapted from KET's Where the River Bends demonstrates how climate change and glacier movement during the Ice Ages destroyed the old Teays River and created the Ohio River, Kentucky's northern border. Accessibility features: Caption	6-12	Video
Ice-Core Record of Climate This video excerpt from NOVA: “Extreme Ice” explores how ice cores reveal a relationship between greenhouse gases and climate. Accessibility features: Caption, Transcript	6-12	Video
Nisqually Glacier at Mount Rainier Observe the Nisqually Glacier at Mount Rainier in this video segment from NatureScene. Accessibility features: Caption	3-8	Video
Plate Tectonics: An Introduction This video segment adapted from Discovering Women uses animations to introduce the theory of plate tectonics and to explain why earthquakes occur and how continents form. Accessibility features: Caption	6-12	Video
Plate Tectonics: Lake Mead, Nevada Using animations to illustrate the theory of plate tectonics, this video segment adapted from Discovering Women takes you to Lake Mead, Nevada, to see visual evidence of how plate movement has been stretching the North American continent. Accessibility features: Caption	6-12	Video
Secrets in the Salt This video segment adapted from NOVA scienceNOW describes a team of scientists searching for evidence of ancient life within a salt deposit that formed 250 million years ago. Accessibility features: Caption	6-12	Video
T. Rex Blood? Learn about the surprising finding of preserved soft tissue in dinosaur fossils—including possible blood vessels and red blood cells—in this video segment adapted from NOVA scienceNOW. Accessibility features: Caption	6-12	Video
Tropical Ice Cores Measure Climate In this video segment adapted from NOVA scienceNOW, glaciologist Lonnie Thompson shows how glacial ice cores from the tropics track centuries of climate change. Accessibility features: Caption	6-8	Video
Water Formation Hypothesis In this video segment adapted from NOVA, learn about an experiment investigating whether liquid water on Earth could have resulted from a massive planetary impact billions of years ago. Accessibility features: Caption	6-12	Video