A tiger's roar peaks at around 18 Hz, just below the threshold of human hearing, which begins at 20 Hz. That gap is not a flaw in the tiger's design. It is the design. Infrasound at 18 Hz does not ...

The true identity of a "ghost" might be 19 Hz infrasound.The phenomenon of feeling like you are being watched or seeing a ...

For centuries, people have described strange sensations in old houses and historic buildings. Some report feeling watched, uneasy, or inexplicably uncomfortable despite finding no obvious reason for ...

Add Yahoo as a preferred source to see more of our stories on Google. (urbazon/E+/Getty Images) Have you ever entered a place that doesn't feel quite right? While a supernatural explanation may seem ...

There are many possible explanations for hauntings, not least that humans are highly suggestible creatures, especially when we want to believe. But some ghost sightings might actually be the result of ...

Most of us take for granted that what we can hear represents the full acoustic world around us. It doesn’t. Beneath the threshold of human perception lies an invisible ocean of sound — and scientists ...

Scientists have captured the sounds of the skies at an altitude of 13 miles with microphones attached to solar-powered balloons. The aerial recordings include the rumblings of thunder, wind turbines, ...

Rainbow Bridge, the world’s largest known rock arch, in a remote area of Utah. (Courtesy: Harvey Leifert) Rainbow Bridge, the largest known rock arch in the world, spans a tributary of Lake Powell in ...