Whey do they say that after divorce most men remarry within a year and women dont?

Men are Islands. Men have fewer emotional connections and the void left by divorce is more difficult for them to fill. Men have more difficulty recognizing their emotions and having a spouse who can offer the support and encouragement they need to manage their emotions leads them to seek attachment sooner than most women.
Varies. After divorce, men mostly find that entering the re-dating scene is a little easier than women. Women are more emotionally affected, and frequently have children to care for and simply lack the time to find another suitable mate.