The solstice alignments of Stonehenge, explained. Subscribe to our channel! Note: A previous version of this video referred imprecisely to .<br>LIGO. A billion dollar gravity wave observatory built to detect gravity waves finally did so in 2015 thereby validating a 100-year-old prediction by Albert Einstein.<br>Short Documentary revealing some new discoveries of ancient geometry and astronomy at Stonehenge.<br>Science, tech, and other curiosities, from Vox producers Joss Fong and Dion Lee.
