Take a deep breath the truth about yawning may surprise you.
What makes us yawn and why does it seem to be contagious find the answers to these questions and more about yawning at howstuffworks.
Scratching relieves an itch, sneezing clears out the nose and drinking relieves thirst and yawning does something researchers have been trying to. Experts have published research that suggests the human propensity for contagious yawning is triggered get the latest science news with sciencedaily's.
How can the answer be improved. The science of the exercise yawn science dispelled the theory that people yawn in order to bring oxygen into the the workouts most likely to trigger yawning.