Scientists have discovered a weird and wacky quirk regarding how poison frogs have sex. Several species of male poison frogs use a "swollen fingertip" to pass pheromones into the female during sex, ...

Swollen ankles, also known as edema, are brought about by the buildup of fluid around the ankles, feet and legs. Most of the time, swollen ankles are temporary and not a cause for concern. However, it ...