Scientists found that combining oxytocin with an Alk5 inhibitor revitalized extremely old male mice, boosting their lifespan and strength. Female mice showed only short-term improvements, highlighting ...

The adornments on the heads of male Lady Amherst’s and golden pheasants partially block their sight, according to new ...

Seasonal biology reveals how winter alters gene expression, hormones, and immune function, impacting health through circadian ...

Some partner qualities matter more in the absence of physical attraction. Men were open to a long-term relationship with a ...

In the animal kingdom, penises can be spiked, split, corkscrewed—even detachable. They're one of the most diverse structures ...