Twenty five years ago, July 11 was designated as World Population Day. About 225,000 human beings will be added to the world today — and the next, and the next, and the next. It has become almost ...

Over the past decade, I have made some bold predictions about the future of sex. One that’s been easy is that people will still be having sex for years to come, but for different reasons: they simply ...

In 1972, citizen scientist Sir Elton John hypothesized that Mars "ain't the kind of place to raise your kids." Thinking about fertility on Mars isn't just for philosophical fun; in fact, Elon Musk's ...