American diplomats in China are falling ill with symptoms like headaches, nausea, and hearing loss after hearing “odd sounds” in their apartments. It’s an eerily similar situation to what happened in ...

Although they’re emitted by some in the animal world, infrasound are sound waves with frequencies so low, they are beyond the limit of human hearing. Now, thanks to the app call RedVox, scientists and ...

Infrasound is too low-frequency for humans to hear. It has been mistaken for ghosts, has been known to cause nausea and headaches in humans, and is used to monitor the testing of nuclear weapons. It’s ...