American researchers have unveiled a new tool for detecting illegal nuclear explosions.

• Position: NOTEWORTHY - Brief article

American researchers have unveiled a new tool for detecting illegal nuclear explosions--the Earth's global positioning system, better known as GPS, which "is a complement to other methods, such as seismic detectors and chemical sensors, and can help confirm that a nuclear test has taken place, especially when the test was underground, so that its effect in the air is...