New evidence contradicts a claim by a British team to have found 40,000-year-old human footprints in a Mexican quarry in July 2005. This radio broadcast reports on findings that the volcanic ash layer the footprints were...

This lesson plan from the Florida Advanced Technological Education (FL-ATE) Center includes a group of materials on the trebuchet. Available materials include a downloadable simulation, a classroom exercise, and contests...

Satellites are used for just about any purpose imaginable, and the United Nations Institute for Training and Research Operational Satellite Applications Programme (UNITAR) is one that is meant to help out in "the life of...

The United Nations (UN) website contains a tremendous amount of data, and for some new users (and even those who are more experienced), it may be a bit overwhelming. Recently, the UN created this fine website designed to...

Learn more about the historic voyage of the H.M.S. Challenger. Scientists from all disciplines set out on December 21, 1872 for a four year research cruise to map the sea and its contents. This voyage paved the way for...