Amazon river dolphins have been spotted peeing into the air, shocking scientists... and the internet. During a recent study, scientists observed a group of Amazon river dolphins for more than 200 hours and saw males spurt urine into the air 36 times. The frequency suggests that “aerial urination” is a common behavior, rather than an unusual one-off. Some researchers believe it could be a form of social expression, a way to indicate health or identity. Learn more about this peculiar behavior and