It's commonly thought that sperm "race" to the egg, with the winner fertilizing it. But is this really the case?

Females, on average, live nearly five years longer than males. They also tend to experience age-related cognitive decline at ...

Women possess two X chromosomes, one of which is usually "silent." This latter chromosome, long considered inactive in women, ...

Genghis Khan wasn’t just the founder of the Mongol Empire—he may have left behind one of the biggest genetic legacies in ...