Peppercorn-sized clusters of human brain cells survived in laboratory dishes for nearly six years, with some reportedly reaching seven. Despite having no body or sensory input, their molecular clocks continued to follow the timetable of human brain development—suggesting that part of the brain’s maturation schedule is written into the cells themselves.
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Inside a developing child, the brain never experiences time alone. Its cells are exposed to blood flow, hormones, nutrients, immune signals, movement and a growing stream of sensory activity. Every moment is embedded in the rest of the body.
That is what makes a long-running laboratory experiment so revealing. Peppercorn-sized clusters of human cortical cells, grown without a body and without eyes, ears or other sensory organs, continued to pass through part of the molecular sequence seen during
That is what makes a long-running laboratory experiment so revealing. Peppercorn-sized clusters of human cortical cells, grown without a body and without eyes, ears or other sensory organs, continued to pass through part of the molecular sequence seen during
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