Good morning. I'm Noel King with the answer to a mystery that has puzzled scientists and kids for years. When we crack our knuckles, why do they make that popping sound? A grad student in France, ...

Cracking your knuckles is something many people do out of stress, boredom, or just habit. Yet for years, it has been surrounded by fear and misinformation. Some believe it weakens the joints, while ...

Rachael has a degree in Zoology from the University of Southampton, and specializes in animal behavior, evolution, palaeontology, and the environment.View full profile Rachael has a degree in Zoology ...

Many of us have noisy joints. Knees crack on the stairs, necks pop when we stretch, and knuckles seem to crack almost on demand. These sounds can be startling and are often blamed on ageing, damage or ...