Whatever our prehistoric ancestors were doing at Stonehenge, they were probably doing it to trance music, suggests a new study.  Researchers conducted the first mathematical analysis of Stonehenge’s acoustical properties and found that, at its prime, the Bronze Age structure would’ve been the perfect venue for fast-tempo jams.

Since only about a third of the original 80 monoliths that made up Stonehenge are still standing, researchers Rupert Till and Bruno Fazendaused the next best thing: a full-scale concrete replica of Stonehenge located in Washington state.  Acoustic tests at the replica site as well as computer simulations showed that a fast tempo of about 160 beats per minute—think trance, or samba, or your heartbeat after some energetic dancing—coincide with the echoes reflected by the stone structures.