Who do you work for? https://www.phantomconnections.space/phpBB3/viewtopic.php?f=3&t=751797 bangyoulater The minibrains grew 2 to 3 millimeters (0.08-0.1 in) in diameter, and have survived in lab dishes for 10 months so far. Their size is limited, because they lack a circulatory system to provide nutrients and oxygen to their core regions. As a result, the brains could not develop the many layers seen in a real human brain, the researchers said.