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Scientists have identified the signal that prevents stem cells from proliferating, protecting the brain against too much cell division and ensuring a pool of neural stem cells that lasts a lifetime.
Word of the Day
- Inward knowledge; understanding; conscience.
The word 'inwit' comes from Middle English inwit ("mind, reason, intellect, understanding; soul, spirit; feeling; the collection of inner faculties; one of five inner faculties; one of the outer bodily senses.; inward awareness of right or wrong, conscience"), from Old English *inwitt, inġewitnes ("consciousness, conscience, knowledge, knowing"), equivalent to in- + wit. (Wiktionary)