Researchers find each of the following myths either unproven or untrue:

People should drink at least eight glasses of water a day

We use only 10% of our brains

Hair and fingernails continue to grow after death

Shaving hair causes it to grow back faster, darker, or coarser

Reading in dim light ruins your eyesight

Eating turkey makes people especially drowsy

Mobile phones create considerable electromagnetic interference in hospitals

Full Story: BMJ.