Waterfalls have a specific threshold of water flow that must be maintained to preserve their characteristic sound and appearance, according to research that used audio recordings and images to monitor ...

Hearing might be the purest of senses. It’s easy to be fooled by sight, smell, touch or taste. The hum of an interstate highway behind a hill is unmistakable. The whine of a single engine plane in the ...

Deep sleep - also known as slow-wave sleep - is crucial for memory, physical renewal and hormonal regulation. But as you get older, it substantially decreases, and scientists believe this contributes ...