Nasa Stopwatch

NASA scientists have developed a stopwatch timer that can measure within a fraction of a billionth of a second, an advance that can help record precise height measurements of sea ice, glaciers, forests and the rest of the Earth's surfaces.

NASA scientists have developed a stopwatch timer that can measure within a fraction of a billionth of a second, an advance that can help record precise height measurements of sea ice, glaciers, forests and the rest of the Earth's surfaces.