Men with bisexual, risk-taking gene variants tend to have more kids: study

A new study from the University of Michigan (U-M) suggests that genetic variants tied to male bisexual behavior and risk-taking are linked t...

Japanese scientists create litter of mice with 2 fathers

Japanese researchers have successfully used male mouse cells to create eggs, marking a significant breakthrough in reproductive biology.  Th...

Asian and European men saw largest increases to penis size in past 3 decades, study finds

Asian and European men saw the world’s largest increases in average penile length in the past three decades, a new study by a team of intern...