United States

Articles and information related to the geography of the United States

Double rainbow seen from Lower Mammoth in Yellowstone National Park. Photo: Dan Hottle/NPS, public domain.

Exploring Rainbows and Moonbows

Caitlin Dempsey

Rainbows and moonbows occur when light is refracted through drops of water in the sky.

A shaded relief map with labels of the highest point in each state.

Highest Point in Every U.S. State

Caitlin Dempsey

Discover the highest point in each U.S. state.

Graph with lines in 1,000 foot intervals with a mountain graphic and labels corresponding to the heights of the five tallest mountains in the United States.

The Highest 11 Mountains in the United States

Elizabeth Borneman

Learn about the highest 11 mountains in the United States.

A shaded relief map of the United States with inset maps for Alaska and Hawaii with lowest points in each state marked with a small black dot and highest points in each state marked with a red diamond symbol.

U.S. States With the Most Extreme Elevation Spans

Caitlin Dempsey

Here are the states with the greatest difference in elevation between the highest and lowest points.

Three wolves eating a deer in the snow.

Study: Human Activities Have Changed How Wolves Hunt Deer

Caitlin Dempsey

Logging, linear features, and human infrastructure are changing where wolves hunt for deer.