The "reverberation time"—the time it takes for a sound to decay by 60 decibels—was about 0.6 seconds for mid-frequency sounds inside the model. This indicated that sounds inside Stonehenge ...

Thousands of years ago, ancient Britons built Stonehenge, but its true purpose has puzzled researchers for centuries. Could it have been a burial ground? A way to observe the night sky? Or maybe ...