Wild animals provide a unique challenge for physiologists because they are difficult to capture and monitor in their natural habitats. As a result, scientists are increasingly learning about organisms ...

For estrogen to enhance learning and memory, nerve cells in the brain called cholinergic neurons are essential to the process, suggest animal studies performed by researchers from the University of ...

A large-scale analysis of 117 mammal species found that preventing reproduction is associated with longer lifespans, suggesting a strong link between reproductive activity and life expectancy. Why do ...

I probably don't need to tell you that, although they're among our most basic biological functions as human beings, conception and pregnancy are basically the closest any of us are ever going to get ...

Animals that can change their sex naturally might sound surprising at first, but in nature, it is simply another survival ...

Some animals reproduce only once before dying. This life strategy, called semelparity, sees organisms channel all energy into ...

Once again I am extremely lucky to have this article co-written by a senior graduate student who's an expert on how reproductive hormones act on the brain. Stephanie Koebele is completing her Ph.D.

In the animal kingdom, mating isn’t always about survival. From praying mantises to octopuses, some species die during or ...