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Sydney funnel-web spider. The most dangerous spider on Earth doesn't live in a rainforest or a remote desert. It lives in Sydney. In backyards. In garages. In swimming pools. Inside shoes left by the back door. It doesn't avoid humans. It wanders into their homes. And when cornered, it doesn't run. It rears up on its back legs, fangs forward, and strikes downward — hard enough to pierce a fingernail. Here's what makes it specifically terrifying: the venom is designed, by pure evolutionary accide