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10 Surprising Signs You're Going to Live to 100

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10 Surprising Signs You're Going to Live to 100

First there's #HowOldRobot— the app that tells you how old you look (come on, we know you tried it). Now there's a calculator that predicts how old you might live. But unlike Microsoft's app, the Living to 100 Calculator is based on actual science, and Thomas Perls, M.D., a geriatrician at Boston Medical Center and professor at Boston University School of Medicine, created it so you can easily guesstimate your lifespan. Of course, your odds of becoming a centenarian are partly based on your genes, but there are a few helpful habits the app proves you can pick up even if you don't hit the genetic jackpot. Learn 'em now and who knows—maybe you'll be blowing out 100 candles on your b-day cake.

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