Expert-reviewed information about the Earth. For everyone.
-
Featured Article
Ecological pyramids
Ecological pyramids are diagrams that illustrate how ecologically important factors, such as energy, biomass, and population size, vary between trophic levels in an ecosystem.... More »
-
Featured Article
Dudleya cymosa (Lem.) Britt. & Rose
Dudleya cymosa (Lem.) Britt. & Rose is a perennial low-growing succulent plant species that is endemic to California. Having a number of subspecies, this fleshy plant is... More »
-
Featured Article
West Nile Virus
Since 1999, more than 30,000 people in the United States have been reported as getting sick with West Nile virus. Infected mosquitoes spread West Nile virus (WNV) that can... More »
-
Featured Article
Earth's atmosphere
The Earth's atmosphere is an envelope of gas that surrounds the Earth and extends from the Earth's surface out thousands of kilometres, becoming increasingly thinner (less dense)... More »
Ecoregions of Panama
Last Updated on 2013-05-20 at 02:30
The Ecoregions of Panama are shaped by the jagged elongated geometry of the country, its varied terrain within Mesoamerica and its tropical climate. This key land bridge... More »
Bab el-Mandeb
Last Updated on 2013-05-19 at 23:05
The Bab el-Mandeb (Bab al-Mandab) strait (12° 34' 34” North, 43° 21' 11” East) separates Africa (Djibouti and Eritrea), and Asia (Yemen), and... More »
Registan-North Pakistan sandy desert
Last Updated on 2013-05-19 at 20:50
The Registan-North Pakistan sandy desert is an ecoregion spanning southern Afghanistan; the extreme eastern portion of Iran; part of northwest Pakistan, covering a total land... More »
Strait of Malacca
Last Updated on 2013-05-19 at 18:27
The Strait of Malacca, located between Indonesia, Malaysia, and Singapore, links the Indian Ocean to the South China Sea and Persian Gulf. The length of the strait is about 800... More »
-
Articles -
Blog Posts -
Galleries -
News -
Resources -
Videos
- Include Content from all Sub-Sections
| Type | Title | Author | Date |
|---|---|---|---|
| Retrieving data... | |||

Site Options