This Tiny Insect Spread the BUBONIC PLAGUE!

This tiny bug helped wipe out a third of Europe.

Fleas—just a few millimeters long—were the secret carriers of one of the deadliest diseases in human history: the bubonic plague.

They hitched rides on rats, biting infected ones, then biting humans—spreading Yersinia pestis bacteria with every nibble.

In the 1300s, the Black Death killed up to 75-200 million people. All because of a flea you could crush with your pinky.

Tiny - but dangerous!

I feel itchy now -

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