For mating male octopuses, one limb is more important than all others. That is the third right arm or hectocotylus, which is ...

Before Lincoln Park Zoo's Kapuki had her rhino calf, matchmakers had to find a father. The male, brought in from Ohio, called ...

Just because a female olive baboon has mated with a specific male doesn't mean he will be the father of her offspring.

For most of the year (when not hibernating), this small, brown frog perfectly matches its boggy surroundings. But during the ...