Why do our fingers and toes prune up when we swim?
To better handle wet objects. Researchers at Newcastle University found that subjects with pruney fingers could transfer wet marbles between two containers significantly quicker than subjects without. On the other hand, pruney fingers added no advantage to transferring dry marbles.
Why do we get phantom phone vibrations?
Because we’re expecting a call. In a study at an academic medical center in Massachusetts, 68 percent of mobile phone users reported feeling vibrations from time to time even though their phones weren’t actually vibrating (or, in some cases, with them at all). These ghostly vibrations are merely hallucinations based on prior experience, in which the same areas of the brain’s sensory centers are activated as when we feel a true vibration. Similar to when you’re “pretend” tickled, the brain tricks itself into a feeling based on expectation.