Sharks at the Loveland Living Planet Aquarium in Draper, Utah, glide silently behind glass walls — but just how silent is ...
The Why Files on MSN
They used sound to lift stones - was this the secret to the pyramids?
Ancient civilizations moved stones weighing hundreds of tons without cranes, pulleys, or modern machines. One theory? They used sound. And shockingly, science now shows acoustic levitation is real — ...
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