Here's a curious discovery about how we move through crowded spaces: pedestrians have a measurable bias toward veering left. Researchers have observed this pattern consistently, but here's the thing—nobody knows why. According to io9, scientists have no explanation for this leftward preference. It's not something we learn, and it doesn't vary by culture. The mechanism behind it remains a complete mystery. Which is humbling, really—one of the most basic things about how we navigate the world, and our brains haven't bothered to tell us why.

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