1. The document discusses debunking 10 common old wives' tales with science, including that cracking knuckles does not cause arthritis and swallowed gum does not stay in the stomach for years.
2. Another wives' tale debunked is that eating carrots improves eyesight, with science showing carotenoids in carrots are linked to eye health but do not directly improve vision.
3. The last wives' tale discussed is that sitting too close to the TV will damage eyes, but studies found no such vision issues from TV watching distance.