Articles Index
Aurora Borealis or Northern Lights
An overview of the Aurora Borealis or Northern Lights - learn how they're formed, where to see them, and how they're predicted.
Karst Topography and Sinkholes
Dangerous sinkholes and beautiful caverns are two results of landscapes known as karst topography. Learn about these features from your About.com Guide to Geography.
Rivers: From Source to Sea
Rivers provide us with food, energy, recreation, transportation routes, and of course water for irrigation and for drinking. Learn all about rivers from the About.com Guide to Geography.
Geography of Dogs
According to most experts, all modern dog breeds are posited to have originated from Southeast Asia. There, thousands of years ago, humans interacted with local grey wolf populations and eventually domesticated them.
Megadiverse Countries
Megadiversity is extreme biodiversity found in a small number of countries worldwide. Most megadiversity is found in tropical regions of the world.
Aphelion and Perihelion
An overview of the earth's orbit around the sun, including the times when it is closest to the sun and farthest from the sun, known as perihelion and aphelion, respectively.
Winter Solstice
December 21-22 is the winter solstice in the Northern Hemisphere and marks the beginning of winter for the earth north of the equator.
Rock Cycle
Discover how igneous, metamorphic, and sedimentary rocks are created and how they can be recycled as part of the rock cycle.
Pacific Ring of Fire
A thorough look at the Pacific Ocean's Ring of Fire of volcanoes and earthquakes.
Plate Tectonics
Learn about the development and history of plate tectonics, from its innovation by Alfred Wegener to how scientists today understand how the plates of the Earth's lithosphere move.
Pangea
An overview of the supercontinent of Pangea, which covered one-third of the planet and began to break up about 200 million years ago to form the modern continents of today.
Summer Solstice
June 21 is the summer solstice in the Northern Hemisphere and marks the beginning of summer for the earth north of the equator.
Trees
Learn about the benefit of trees in a community, from the About.com Geography GuideSite.
California Earthquake
This page provides clear direction for locating information about California earthquakes that have just occurred or past historical California earthquakes.
How Do You Make and Break a Mountain?
An overview of mountain building and how geomorphologic processes contribute to the building and breaking of mountains.
Biomes
An overview of biomes and how they differ. Learn all about biomes from this overview from the About.com Geography GuideSite.
The Longest Day of the Year
The summer solstice is the longest day in the year but it's not the day of earliest sunrise or sunset - learn more about this intriguing occurrence, from your About.com Guide to Geography.
An Overview of Valley Formation and Development
Learn all about the development of valleys through this great overview article on valley formation from the expert About.com Geography site.
Sand Dunes
Learn about the formation and creation of sand dunes around the world, from the About.com Geography GuideSite.
Solar Eclipse
Learn about all types of solar eclipse - from total solar eclipse to partial solar eclipse. A solar eclipse is caused by the moon blocking the sun as viewed from the earth.
Geodesy and the Size and Shape of the Planet Earth
Learn all about the size of the earth, the shape of the earth, and how its size and shape are measured in the science known as geodesy, from the About.com expert Geography GuideSite.
Soil
An overview of the soil of the lithosphere of the earth. Learn all about soil from your About.com Guide to Geography.
An Overivew of Icebergs
A comprehensive overview of icebergs from their formation from ice sheets to their movement in the world oceans to their tracking and monitoring to their melting.
Watersheds
An overview of watersheds, the relationship of watersheds to rivers and streams, and information about watershed management from the About.com expert Geography Site.
Wetlands
An overview and information all about wetlands. Learn about wetlands from this informative article from the About.com expert geography site.