Why is yawning contagious?

Why is yawning contagious?

This is a something that we all know, right? Yawning is contagious and we’ve all felt it. It only takes one sleepy friend to yawn and the whole room will suddenly begin yawning. Have you ever asked yourselves how is this even possible? There are a few studies behind this question. Some assumed that contagious yawning…

What is deja vu, why does it happen and what causes it?

What is deja vu, why does it happen and what causes it?

Deja vu is a feeling of having already experienced a certain situation. It comes from French and it means “already seen” and you’ve probably lived it so far. About 90% of us experience deja vu at least once in their lives and mainly in our teen years. Deja vu is not really a physical phenomena….

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