Not All Gravitational Waves Are Created Equal The LIGO experiment hunts for gravitational waves that are different from those sought by BICEP2. Although both types are elusive, they differ in age and strength—and come from very different places By Clara Moskowitz on January 14, 2016 The LIGO Hanford Observatory in Washington State. LIGO In physics circles a … Continue reading Not All Gravitational Waves Are Created Equal