PBS
How Earth's First, Unkillable Animals Saved the World
They have survived every catastrophe and every mass extinction event that nature has thrown at them. And by being the little, filter-feeding, water-cleaning creatures that they are, sponges may have saved the world.
PBS
How Plants Caused the First Mass Extinction
In the middle of the Cambrian, life on land was about to get a little more crowded. And those newcomers would end up changing the world. The arrival of plants on land would make the world colder, drain much of the oxygen out of the...
PBS
When a Billion Years Disappeared
In some places, the rocks below the Great Unconformity are about 1.2 billion years older than those above it. This missing chapter in Earth’s history might be linked to a fracturing supercontinent, out-of-control glaciers, and maybe the...
Crash Course
What Are Glaciers? Crash Course Geography
Today we’re going to talk about glaciers. These behemoth globs of compressed ice and snow moving across the land created fertile soils and physical features while also serving as frozen time capsules. They recorded both Earth’s climatic...
SciShow
The Freezing Dunes of Northern Canada
When you think "sand dunes" you probably wouldn't think to look up in the northern reaches of Canada, but there lies one of earth's most unique habitats.
Curated Video
Interglacial period
A period of warmer climate in between the glacial periods of an ice age. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images and concise textual definitions. Twig Science Glossary Films...
Curated Video
My Environment
Dr. Forrester discusses interactions between people and their environment and how environmental processes and characteristics influence human settlement and activity.
Visual Learning Systems
Life Through Time: Life in the Cenozoic Era
This fascinating program takes students on a journey through time as the history of life on Earth is explored. From the dawn of life to the existence of advanced vertebrate animals, each of the major periods of life are investigated....
Curated Video
News Item (052a4c96-70fd-4ae7-1b93-b941acbab374)
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new york: columbia geologic research rport on antartica
shows: dr dennis hayes sof reports on first deep - sea exploration of ocean floor in antartica: have found continent frozen much longer than...
Howard Hughes Medical Institute
Stickleback Film with Quiz: Evolving Switches, Evolving Bodies
The pelvic bone's connected to the...nothing in the stickleback fish, because it doesn't have one. Young biologists watch a video about the evolution of the stickleback fish living in Alaskan lakes. It turns out that they lost their...
PBS
Pbs Learning Media: Glaciated Landscape
In this video from Nature, learn about the many different features and effects of glaciers in Ireland. [1:13]