Ashutosh Jogalekar

It took us 100 years to confirm the last big puzzle of Einstein’s theory of relativity. On Feb. 11, scientists announced that they have detected gravitational waves, which are created when two accelerating masses generate “ripples” in the curvature of spacetime—just like frolicking children on a rubber sheet generate waves in the material. Along with electromagnetic radiation, gravitational waves will give us another window through which we can “listen” to the universe.