Unexplainable Why do we yawn?
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Jul 10, 2024 
Dr. Andrew Gallup discusses the mysteries of yawning, including its contagious nature, role in brain temperature regulation, and evolutionary history across different species. The podcast challenges misconceptions about yawning, explores its medical implications, and highlights its benefits for cognitive functioning and social bonding.
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Debunking the Oxygen Theory
- The theory that yawning increases blood oxygen has been disproven.
- Manipulating oxygen/carbon dioxide levels doesn't affect yawning frequency.
Brain Stretch Hypothesis
- Yawning may function as a brain stretch, increasing blood flow.
- Animals with larger, more complex brains exhibit longer yawns.
Brain Cooling
- Yawning cools the brain by increasing blood flow and airflow.
- It acts like a radiator, dissipating heat.