It’s long been known that the stone monoliths that make up the mysterious Stonehenge site in the UK traveled a great distance to get there, but up to this point the exact origin of the stones was unknown. Now, a team of British geologists have found the exact site from which the innermost circle of bluestone rocks were quarried.
Apparently, Rupert Till, an expert in acoustics and music technology at Huddersfield University in northern England, knows where to find a good party. Till took a second look, or rather, a second hear, at the 5,000-year-old Stonehenge and discovered that its huge stone slabs reflected sound perfectly, making the site the perfect place to listen to repetitive, trance-like music.
Five amazing, clean technologies that will set us free, in this month's energy-focused issue. Also: how to build a better bomb detector, the robotic toys that are raising your children, a human catapult, the world's smallest arcade, and much more.