Women are most attractive to men at about 23. And men's attractiveness to women seems to get better with age.
The cofounder of the online-dating site OKCupid wrote a book called "Dataclysm" that used data from his dating site to answer questions about love, dating, and relationships.
According to the book's analysis of the data, men find women in their early 20s most attractive. Even as the men got older, their preference for 20-something women seemed to stay the same. Women in their 20s on the site, on the other hand, tended to like slightly older men (a year or two older than they were) and women in their 30s tended to like men a few years younger than them.
A disclaimer: OKCupid's data pool, which is based on its users, isn't a representative sample of the population.
Life satisfaction first peaks at 23.
A survey of 23,000 people in Germany found that 23-year-olds were particularly satisfied with their lives, "all things considered."
Strength peaks at age 25.
Your muscles are at their strongest when you're 25, although for the next 10 or 15 years they stay almost as hefty — and this is one of the traits that can be most easily improved, thanks to resistance exercise.
The peak age to settle down is 26.
The 37% Rule of statistics says that at age 26 you'll have met enough people to have some solid options without waiting so long that they start pairing off without you.
And according to one recent study, divorce rates are lowest for couples who married between the ages of 28 and 32.
The average elite marathoner is 28.
According to one 50-year analysis of marathons, the average age to complete the race in just over two hours was 28.
Bone mass peaks at about 30.
Your bones are at their strongest and densest when you're 30 years old. Again, you can keep your calcium and vitamin D intake high to keep your bones healthier longer, but eventually, they will start to weaken.