This article commemorates the twenty-fifth anniversary of the landing of NASA's Viking I lander on the surface of Mars. The mission history and achievements of this lander and its successor, Viking II, are described in a brief account. Links to related topics are included. Full description.

This page examines the discussion among scientists regarding the retreat or growth of the West Antarctic Ice Sheet. It appears that the West Antarctic Ice Sheet is retreating more slowly than they thought. In fact, it may have been growing just 8,000 years ago, long after the end of the most recent Ice Age. The article features text, maps, graphs, and links to related topics. Full description.

The Exploratorium digital library includes digital media, digitized museum materials related to interactive exhibits and scientific phenomena. Full description.