Insight into planet Earth through satellite photography from space, as well as vantage points from helicopters and cameras on the ground.

Insight into planet Earth through satellite photography from space, as well as vantage points from helicopters and cameras on the ground.

Cutting-edge camera technology and computer-generated graphics provide details as to how animals can fly and how flying is used as a survival mechanism. Co-produced by [More]

Cutting-edge camera technology and computer-generated graphics provide details as to how animals can fly and how flying is used as a survival mechanism. Co-produced by PBS and BBC, the series explores the basic principles of flight and shows how animals overcome gravity to become airborne in the first place. From leapers to gliders like vultures and flying squirrels, the series also covers animals that are able to stay in the sky, like the peregrine falcon and hummingbird, and what it takes to survive in a crowded sky.

Joseph Duff is one of the leaders of Operation Migration, a nonprofit organization that is using aircraft to restore migrating populations of whooping cranes.

Joseph Duff is one of the leaders of Operation Migration, a nonprofit organization that is using aircraft to restore migrating populations of whooping cranes.

While the Moon is Earth's only natural satellite, there are thousands of artificial satellites circling our planet for navigation, communications, entertainment, and science. These satellites [More]

While the Moon is Earth's only natural satellite, there are thousands of artificial satellites circling our planet for navigation, communications, entertainment, and science. These satellites are an integral part of our everyday life, and they provide a source for scientific data unavailable from Earth's surface. This video segment adapted from NASA's Goddard Space Flight Center describes some of the different kinds of satellites that orbit Earth. This video is available in both English and Spanish audio, along with corresponding closed captions.

Learn about hippos with the Wild Kratts gang. Chris and Martin show the hippopotamus in its natural habitat -- by the riverside!

Learn about hippos with the Wild Kratts gang. Chris and Martin show the hippopotamus in its natural habitat -- by the riverside!

Solar eclipses result from the alignment of the Sun, Moon, and Earth. Total solar eclipses — in which the Sun is completely blocked by the [More]

Solar eclipses result from the alignment of the Sun, Moon, and Earth. Total solar eclipses — in which the Sun is completely blocked by the Moon — are a spectacular and rare sight to witness. In this animation adapted from NOVA, see why solar eclipses occur and observe a simulated total eclipse. This video is available in both English and Spanish audio, along with corresponding closed captions.