• Light-emitting TVs, smartphones, computers, and video-game players can suppress the sleep-promoting hormone melatonin and rev us up, making it difficult to nod off.
• Raising kids causes marital stress and other varieties of unhappiness.However, parents over 50 are happier than their childless counterparts, as when kids grow up they become a source of emotional and financial support.
• Researchers at Northwestern University have unlocked the genetic code that allows them to transform stem and skin cells into basal forebrain cholinergic neurons. Transplanting these cells into the brains of Alzheimer's patients could restore their mental function.
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