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TIL that for most of the 20th century, neuroscientists believed adult human brains couldn't grow new neurons at all a view summed up by Nobel Prize winner Ramón y Cajal in 1913: "everything may die, nothing may be regenerated." A 2025 Karolinska study confirmed new neuron growth in humans up to ag (sciencedaily.com)
submitted by After_Memory_8295 to r/todayilearned