Gravity ripples chased

摘要

Discovering gravitational waves would not only validate Einstein's theory of gravitation but also reveal aspects of the Universe's earliest moments. The hunt for these elusive ripples is now well under way.rnFor several decades, physicists have been racing to detect gravitational waves - tiny disturbances in space-time that propagate at the speed of light. But the experiments are challenging. They require detection of minute changes - a mere fraction of the size of an atomic nucleus - in kilometre-scale separations between free-floating masses.