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Sperm tested for navigation during weightless sex using tiny obstacle course

Researchers used a tiny plastic “obstacle course” to simulate how sperm would navigate during weightless sex in space.

Published Mar 26, 2026, 12:04 PM EDT | WFMZZ

Scientists created a miniature plastic “obstacle course” to test how much sperm would struggle to navigate during sex in the weightlessness of space. The experiment was designed to simulate microgravity conditions and assess potential challenges to sperm movement and reproduction in space.