Articles

Side by side satellite images of a glacier in 1988 and 2015 showing the glacier shrinking.

Venezuela Becomes the First Country to Lose its Glaciers

Caitlin Dempsey

Venezuela became the first country to lose all of its glaciers as the last remaining ice on Pico Humboldt shrank to less than two hectares.

An annotated satellite image of a white icy area.

Understanding Fast Ice in Polar Ecosystems and Climate Dynamics

Caitlin Dempsey

Fast ice, found in both polar regions, is sea ice that attaches to coasts, icebergs, ice shelves, or the ocean floor.

Colorful tropical fish swim underwater around a reef.

Mapping Coral Reef Health with Sound

Mark Altaweel

Scientists use AI and passive acoustic monitoring to map coral reef health by analyzing ocean sounds.

View of the Manu'a Islands with the volcanic islands of Ofu and Olosega (background), and Ta'u (foreground). Image, NPS, public domain

A Guide to the Geography of U.S. National Parks

Caitlin Dempsey

Find out the answers to geography trivia questions and more in this article about the geography of U.S. National Parks.

A symbols map using the height of cones in blue to show the number of annual visitors to each U.S. national park. The outline of the U.S. states is in gray.

Explore U.S. National Parks: Fun Map and Geography Trivia

Caitlin Dempsey

This interactive map lets you browse interesting geographical facts and trivia about the 61 U.S. national parks.

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