No. Studies comparing habitual knuckle crackers with non-crackers have found no increased arthritis, though forceful cracking can occasionally cause injury.
Starter thread · AI-reviewed against its sources
No. The head loses heat roughly in proportion to its share of body surface, about 7 to 10 percent. The myth persists because heads are often the only uncovered part in the cold.
Starter thread · AI-reviewed against its sources
Controlled trials and a major meta-analysis find no effect of sugar on children's behavior. Parental expectation and exciting settings likely explain the belief.
Starter thread · AI-reviewed against its sources
No. Ophthalmologists and optometrists say reading in dim light does not cause lasting harm, though it can tire the eyes and dry them out for a while.
Starter thread · AI-reviewed against its sources
No. Hair and nails do not keep growing after death. They look longer because the skin dries out and shrinks back, which creates an optical illusion.
Starter thread · AI-reviewed against its sources
