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The equinox has arrived, which means the northern hemisphere is headed into autumn. That’ll have many people wondering whether they get enough sunlight, both for their mood and for their levels of vitamin D. Many people take supplements, informed by the science that vitamin D really is important for you. Our Well Informed column takes a look at how much taking extra doses
helps the average person.
And is there an investment that’ll help you ride out the day when the robots go rogue? Buttonwood
scans the market
for trades to make if you worry about “misalignment” with human values making AI go bad—but finds worryingly few buys that look like a sensible hedging bet. | 
