Mehrere Klumpen von Neuronen schweben in einer nährstoffreichen Lösung in Petrischalen. Mit den zahlreichen geraden, vertikalen Linien, die von ihnen ausgehen, gleichen sie in ihrem Inkubator Miniaturkopien der Nazca-Linien in der peruanischen Wüste. In Wirklichkeit sind das jedoch keine Miniatur-Scharrbilder, sondern sogenannte Multi-Elektroden-Arrays: Gitter aus winzigen Elektroden, die die Neuronencluster – auch Gehirn-Organoide genannt – mit einem Rechner verbinden und so eine Art „Bioprozessor“ bilden.
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