As extreme cold grips large portions of the U.S. this week, residents in several states have reported startling noises coming from trees, loud cracks and pops that some have likened to small ...

If your knees crack, pop, or make that weird grinding sound when you stand up or climb stairs, you are not alone. Those noises can show up in older adults, younger people, and everyone in between, no ...

Discover why knees crack and learn when to seek medical advice from experts on knee health and persistent sounds.

To Scandinavia’s Sami people, the Northern Lights inspire fear and respect. Children should never tease the lights, elders have said, lest the aurora swoop down and carry them into the skies. Inuit ...