In this video segment from NOVA scienceNOW, learn about the effects of gravity as astrophysicist Neil deGrasse Tyson falls through a virtual hole through Earth's center.

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

In this video from Outdoor Nevada, learn about the habitat, diet, and defense mechanisms of horned lizards.

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.

In this video segment adapted from NOVA, follow novice runners as they train for a marathon, and discover how quickly the body responds to regular aerobic exercise.

This animation from KET's distance learning physics course demonstrates the mathematical formula for a scientific law as it applies to light.

Students use media resources and an in-class investigation to explore the types of energy within different types of systems. They also use the formulas for kinetic and potential energy to examine the path of a projectile.

This video from KET traces the energy transformations that occur when coal is burned to produce electricity. Some of the mechanical processes are also described.

In this video from the Science and Technology Chat series, take a tour of a re-created Nevada gold mine to learn about mining techniques.

This video segment, adapted from NOVA scienceNOW, introduces the latest research on a system of neurons that plays a part in how people relate to each other.

In this video adapted from NOVA scienceNOW, find out about the discovery of a new building material, the carbon nanotube, whose physical properties could theoretically enable the creation of a 22,000-mile elevator to space.

Coral reefs are often portrayed as brightly lit, bustling underwater marvels full of colorful creatures. This video segment, adapted from NOVA, paints a different picture as it explores the nocturnal behavior of organisms in the reef.

Observe the Nisqually Glacier at Mount Rainier in this video segment from NatureScene.

In this video segment from Cyberchase, a plant expert shows Bianca the patterns and symmetry found in nature.

In this video from Outdoor Nevada, Brian Wignall speaks with an ornithologist about the peregrine falcon, a majestic and endangered species that is one of the fastest animals in the world.

This KET animation illustrates positive and negative measurement on a straight line and on a flat plane using a point of origin.

In this video segment from NatureScene, observe dragonflies and mayflies near Cedar Creek at Congaree Swamp National Park.

In this video segment from Cyberchase, the CyberSquad breaks down an action into a series of steps in order to program a robot to do what they need it to do.

In this video segment from Cyberchase, the CyberSquad learns how to read a thermometer as they try to keep their chocolate sculpture from melting.

This video segment from NatureScene describes the characteristics of redwood trees at Redwood National Park.