Video Links

Aquifer Education – Videos
From Edwards Aquifer Authority
Check out a series of videos about the Edwards Aquifer in Texas. Drop inside the Edward Aquifer and explore an unfamiliar world or go on an adventure with Doc Edwards and his Aquifer Explorers. 

Cave Formation: Biogeochemical Cycles
From PBS Learning Media
The most common process by which limestone caves form involves carbonic acid—or weakly acidic groundwater—as the primary agent. When carbonic acid contacts limestone, it dissolves minerals in the rock. If enough water to saturate the rock is present over a long time period, cavities and entire underground cave networks can form. Recently, a radical new theory has been proposed that identifies another cave-forming agent: sulfuric acid. This video segment adapted from NOVA identifies the mysterious source of the sulfuric acid, which, unlike carbonic acid, does not readily form in nature.

Cave Formation: Kane Cave
From PBS Learning Media
At first glance, Wyoming's Kane Cave exhibits few characteristics of the world's most picturesque caves – it lacks mineral deposits, including stalactites and stalagmites, which decorate most cave ceilings and floors. Although the cave is not small, it pales in size against more massive ones, like those of New Mexico's Carlsbad Caverns. However, it is not its size that draws scientists to Kane Cave, but another compelling aspect of the cave. In this video segment adapted from NOVA, watch as scientists conduct a simple experiment to determine whether microbes that inhabit the cave could actually be contributing to the cave-formation process.

Deep Underground with Balcones Canyonlands Preserve Biologist
From Austin Wildlands Balcones Canyonlands Preserve
A Balcones Canyonlands Preserve biologist monitors endangered cave species. 

EONS Inner Space Cavern Film
From Inner Space Cavern
Watch amazing video of from Inner Space Cavern in Texas.

“Extreme Caver” Video Takes You to Places Few Have Ever Seen
From the University of Arkansas
To boldly go where no one has gone before – it's not science fiction to Matt Covington, an associate professor of geosciences at the University of Arkansas. After completing a doctoral degree in theoretical astrophysics, Covington combined his interest in caves with his education in mathematical models of physical processes. The result? Covington says he's one of the world's only speleophysicists as he uses physics to study the underground flow of water.

How Caves Form
From PBS
Watch as rainwater, waves, lava, and bacteria create four different types of caves.

Ice Caves of Lake Superior
From Into the Outdoors
The steep sandstone cliffs along Lake Superior have been weathered by wind and waves for millions of years. In some places, this erosional action has formed caves in the rock. When winters become especially cold, ice can fill the caves and create a place begging to be explored. Watch the Serious Science video to discover nature's secrets about these fascinating features.

Inside the Deep Caves Carved by Lava
From National Geographic
Check out photos of lava tube caves in Hawaii.

Kuwoot yas.ein: His Spirit is Looking Out from the Cave
From Title VII Indian Education
After the discovery of 10,000-year-old human remains in On Your Knees Cave on Prince of Wales Island, Alaska, a unique partnership formed among the Tongass National Forest, scientists, and Alaska Native tribes to learn about this ancient person. The groups, brought together through the Native American Graves Protection and Repatriation Act, worked to unravel the secrets of the early man and learn from each other. After this production, DNA analysis from these remains produced strong evidence of early human coastal migration into the Americas.

Luray Caverns on “What in the World?” (5:38)
Luray Caverns as seen on the kid's show "What in the World?"

Mammoth Cave Geology Formation (1:00)
From International Mapping
International Mapping worked with the National Park Service and Argentine Productions to produce an exhibit explaining the formation of Mammoth Cave, the most extensive cave system in the world. The Green River cut through a layer of resistant sandstone to the softer layers of limestone underneath. Water then started flowing through the slightly angled limestone layers to reach the new river level. This water dissolved the cave passages along the first layer and then along subsequent layers as the river continued cutting deeper and deeper.

The Physics and Chemistry of Karst Topography
From Into the Outdoors
Learn how limestone caves are formed and how the process can impact drinking water.

The Wildlands
From Living Springs Channel
Did you know that Austin, Texas manages 26,000 acres that have been purchased by voters through open space bonds to protect the aquifer? Learn about the myriad benefits of preserving our aquifer lands.


USDA Forest Service Prince William Network Cave Research Foundation Cave Conservancy of the Virginias Cave Conservancy Foundation National Caves Association National Park Service Indiana Karst Conservancy US Geological Survey National Cave & Karst Program, United States Forest Service U.S. Fish and Wildlife Service Društvo za raziskovanje jam Ljubljana Luray Caverns Crawford Hydrology Laboratory Under Earth Images Project Underground Natural Inquirer National Speleological Society FSNatureLIVE: Distance Learning Adventures National Cave and Karst Research Institute