Have you ever noticed yourself yawning after seeing someone else yawn—or during a long meeting, a boring lecture, or right before bedtime? Yawning is one of the most common human behaviors, yet scientists still don't fully understand why it happens.
Although yawning is often associated with being tired, it can also occur when you're bored, stressed, exercising, or even after simply watching someone else yawn. Researchers believe yawning serves several important functions involving the brain, nervous system, and sleep-wake cycle.
Let's explore what science currently tells us about this fascinating behavior.