These animals usually live by themselves, and only seek each other out to mate. Only male deer have antlers, but both males and females have a gland beneath their eyes which produces fluid.

The idea that non-human animals have significant moral status is comparatively modern. It owes much to the work of philosopher Peter Singer and his 1975 book 'Animal Liberation'.

5 fast facts about echidnas Echidna spines are actually a special type of hair. Echidnas don't have very good vision, but they have a strong sense of smell and hearing. When they feel threatened ...

Genetics research. Read the latest news on plant and animal genetics from universities and research institutes around the world.