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Scientists Grew Mini Brains That Kept Aging for Years, and Somehow Remembered It

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Scientists have managed to keep tiny lab-grown brains alive for nearly six years, and these little brains have shown signs that they age just like our organic, naturally grown brains do.

The researchers, publishing their findings in Nature, dramatically extended the lifespan of brain organoids, which are clumps of brain tissue grown from stem cells that more or less mimic aspects of human brain development. The big breakthrough here is that most organoid experiments only last a few weeks to months. These were kept going for years, continuing to mature and all the while maintaining a cellular record of how old they were.

The researchers found that the organoid developed a lot of the same broad cell types seen in real brains. Using genetic and molecular........

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