Claiming Social Security early means permanently lower monthly payments. For those born in 1960 or later, full retirement age ...

Nancy S. Jecker does not work for, consult, own shares in or receive funding from any company or organization that would benefit from this article, and has disclosed no relevant affiliations beyond ...

Fact: The way you perform on a run is unlike the way anyone else performs, and that’s especially true if you’re a different age or gender. So how do you really compare your performance to theirs? With ...

When a friend opts to date someone who is old enough to be their parent, a common response is to see if the decision passes the “half their age plus seven” test. The rule, whose origins remain ...

Thanks to contraception and the widespread availability of reproductive technologies, couples today have more control over when they want to begin their family than in the past. Waiting to start a ...

The amount of sleep a person needs recalibrates over time, and circadian rhythms change with age. The 16-year-old who stayed up until midnight may become a 36-year-old who gets drowsy by 10 p.m. At 70 ...

Most people feel younger or older than they really are – and this 'subjective age' has a big effect on their physical and mental health. Imagine, for a moment, that you had no birth certificate and ...

Being asked ‘how old are you?’ used to be a simple question to answer. If you weren't sure, you could always just count the candles on your birthday cake. The candles may no longer tell you the whole ...

To protect children online, more companies and governments are forcing users to prove how old they are. Credit...Shira Inbar Supported by By David McCabe Richard Errington clicked to stream a ...

If you own a dog, you've heard this rule: One year for Fido equals 7 years for you. Turns out, the math isn't that simple. Researchers now have a more accurate way of calculating a dog's age that ...