Why Do People Kiss?

In our society, the kiss is something common and natural. It is a sign of romantic relations and love. Everyone remembers their first kiss. Still, there is something that is puzzling the minds of many – Why do we kiss?

Why Do We Yawn?

What is this strange and contagious thing that we do when we are tired? Let’s look at the science behind the yawn phenomenon and try to shed some light on the burning question – “Why do we yawn?”