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The science of why cockroaches make your skin crawl

They’ve survived for millions of years, so why can’t we bear to look at them?

The science of why cockroaches make your skin crawl
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StarsInsider
17/10/2025 13:00 ‧ 3 days ago | StarsInsider

LIFESTYLE

Psychology

For many people, a cockroach is a psychological trigger that stirs deep discomfort and even fear. These uninvited houseguests invade our most private spaces, embodying dirt, disease, and the loss of control. And despite all our cleaning and pest-proofing, roaches thrive in the environments we create, adapting perfectly to our way of life.

Perhaps that’s why we hate them so much: they exist because of us. This uneasy relationship fuels a deep-rooted fear known as katsaridaphobia, which experts believe affects tens of millions. Indeed, entomologists say cockroaches top the list of humanity’s most feared insects.

So, what is it about these hardy little creatures that makes our skin crawl, and what does that say about us? Click on to find out, but be warned: this gallery is not for the squeamish!

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