All of Earth's living things depend on healthy, life-sustaining ecosystems for their survival. But continued human population growth, combined with the planet's limited supply of natural resources, might generate...
The Yellowstone collection contains an assortment of digital resources relevant to the geology, geophysics, physiography, hydrology, biota and human impacts in Yellowstone National Park. Materials include a variety of...
This flow chart presents the climate classification system developed in the early 1900s by German climatologist and amateur botanist Wladimir Koppen. The system establishes six climate zones (denoted by letters)...
Glaciers are found on every continent except Australia. This interactive feature provides an introduction to these moving streams of ice, which cover about 10 percent of Earth's land surface and hold between two and...
Earthquake prediction has never been an exact science or an easy job. In 1923, the debate between two Japanese seismologists, Akitune Imamura, and his superior at the University of Tokyo, Professor Omori, over whether a...
Manage your resources
Save, organize, and share resources that you find.
Subscribe to bulletins
Automatically be notified about new resources that match your interests.
It's easy, fast, and FREE!