Scientists announced Wednesday that they have once again detected ripples in space and time from two black holes colliding far away in the universe.The discovery comes just months after the first-ever detection of such "gravitational waves," and it suggests that smaller-sized black holes might be more numerous than many had thought."It looks like there are going to be more of these black holes out there than we imagined," says David Reitze, the executive director of the Laser Interferometer Gravitational-Wave Observatory (LIGO), which recorded the latest rattle on Dec. 26, 2015.Albert Einstein predicted the existence of gravitational waves a century ago as part of his General Theory of Relativity. The theory radically re-envisioned the force of gravity as a distortion in space-time. Under this theory, space is flexible and capable of wobbling."It's like a Jell-O that we all swim in," says Gabriela González, a researcher at Louisiana State University and head of LIGO's scientific
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