Do you know why Olympic athletes bite medals after their win?
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Olympic winners
We have all seen how Olympic winners bite their medals after winning.
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The reason
The reason is to check if the medal is of real gold.
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History
It all started over 100 years ago when Olympic historians were unsure used to bite gold coins.
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Authenticity
According to them, a small tooth mark on a coin indicated that it was made of real gold, which is more malleable than counterfeit gold-plated lead coins.
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Why now?
But now, the winners do it to just honour the tradition.
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Fact
If you apply light pressure to gold, it changes shape. So, when a gold medal is bitten by teeth, the winners will see the teeth mark on their medal.
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Fact
If it is only gold plated, the gold foil will scratch off. If it is a different metal, no teeth mark is visible.