Looking for distortions in Spacetime - located near the Hanford Reach nuclear site, the LIGO (Laser Interferometer Gravitational-Wave Observatory) research facility uses lasers fired down two 4km-long tunnels to measure gravity waves,
LIGO lab | ESO Supernova
Gravitational Wave detection – the technical achievement | Celestial North
Gravitational-wave observatory - Wikipedia
LIGO - Wikipedia
Advanced LIGO Facility Hits Milestone in Hunt for Gravitational Waves