Sex

How Sperm ‘Swim’ May Be Nothing But an Optical Illusion

How Sperm ‘Swim’ May Be Nothing But an Optical Illusion

An international group of scientists say their latest research will upturn one of the earliest scientific discoveries ever made about human sperm. In a new paper out Friday, they seem to show that sperm cells don’t propel themselves by simply flicking their tails back and forth, as is commonly believed….