Combined with rising temperatures, chemical pollutants are obliterating animals’ chances of successfully reproducing.

Over the past four decades, sperm counts among men worldwide have dropped by more than 50 percent, according to a 2022 ...

Scientists have created human eggs containing genes from adult skin cells, a step that someday could help women who are infertile or gay couples have babies with their own genes but would also raise ...

Now, scientists are taking control of that formula. The equation for making a human is not straightforward anymore. In a ...

Modern humans may indeed have wiped out Neanderthals – but not through war or murder alone. A new study suggests that when the two species interbred, a slow-acting genetic incompatibility increased ...

Human biology evolved for a world of movement, nature, and short bursts of stress—not the constant pressure of modern life. Industrial environments overstimulate our stress systems and erode both ...