5 Foolproof Ways to Induce a Yawn
Yawning, an involuntary reflex characterised by a deep inhalation and a large opening of the mouth, is a typical human habits that has puzzled scientists for hundreds of years. Whereas the precise causes behind yawning stay elusive, researchers have proposed varied theories, starting from regulating mind temperature to enhancing alertness. Regardless of the continuing debate … Read more
