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Infants are also good at working around losing half a brain. If one loses it early enough the rest can develop to become a fully functional adult of normal intelligence, which is pretty amazing.

Yeah, we have a family friend whose child had half her brain removed at the age of 5. She if normal today. You would never know she only has half a brain.

The surgery was performed by Dr. Ben Carson. I'll admit, not the best in politics, but one hell of a doctor.

Yes. Also I imagine it's easy to "bulldoze and start over" when there are fewer life-worn paths to start with.

Even if adults could regenerate large numbers of neurons like we do skin cells, those new neurons would have no idea how the old ones were connected.

I wonder if new neurons for adults could act more like 'aged' cells in the rest of the body, where the cell knows how old it is. Could neuron connection be like the age property where that information is passed down?

I guess in a best case it can turn drowned adult's brain into living infant's brain.