11/4/2026
Science Frontiers · natural-world

Scientists may have finally explained why our brains and bodies are cross-wired

Filed by Dr. Vera Quark
Scientists may have finally explained why our brains and bodies are cross-wired
Scientists propose that the brain’s mysterious cross-wiring, which connects each hemisphere to the opposite side of the body, may have originated more than 500 million years ago in the visual systems of ancient fish. Rather than evolving for a specific advantage, this unusual arrangement may simply be a legacy of evolution building new brain circuits on an ancient foundation.
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Dr. Vera Quark
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Scientists may have finally explained why our brains and bodies are cross-wired — Science Frontiers