Optimists were up to 70% more likely to reach 85 in two long-term studies, even after accounting for exercise and smoking. If you don't feel like an optimistic person, studies suggest you can rewire your mind. We show you how.
A 1959 experiment showed that people paid $1 to lie came to believe it. The same mechanism leads you to overestimate your own effort. Here's why it's a problem and how to catch it.
Psychologists tested the three parts of a meaningful life. One predicted meaning better than the others.
A viral headline says B12 is "linked to cancer." A study of 6,700 people found the real risk might be eating too little.
The next time you battle decision paralysis, Arnold suggests that asking one question will help you cut through the noise and gain the clarity you need to make the right choice.
A 30-year Harvard study of 147,000 adults found the weekly strength-training dose tied to the lowest death risk, and it's less than you think.
Inversion tables relieve back pain for a minute, but does the relief last? A Cochrane review of 32 trials has a clear answer and a better fix.
A 7-year study of 83,000 adults found standing alone didn't lower heart risk. Here's what actually does, and where (and why) a standing desk helps.
A new study tied glucosamine to faster Alzheimer's, but only in brains already diagnosed. Healthy brains showed no effect. Here's what the 25% actually means.
Arnold says the secret to doing more — across fitness, politics, and film — is refusing to sweat the small stuff. Here's how to take his mentality and apply it to your life.
A viral headline said olive oil fuels cancer. The study used mice, and the finding was much more hopeful than what you might have read. Here's what you need to know and how to adjust your diet.
The famous "marshmallow test" didn't predict adult success once family background was accounted for. Here's what really drives self-control, and how to use it to your advantage.
