Love, or at least procreation, is in the air — especially in the animal kingdom.
Individuals from "virtually all cultures" try to hide their sexual encounters from others.
A recently published paper describes some of the oldest plants and animals in Australia and Zealandia, aged between 40 and 230 million years old.
Echidnas, also known as spiny anteaters, have invaded a woman's home—and it's mating season. "I had to have a sleeping tablet last week."
Lampreys engage in a special kind of mating called lekking.
A pod of dolphins helped protect a humpback whale calf in Australia.
These pests might be more of a threat to livestock than to humans, but so far none have been found with any human diseases.
Some of this behavior may sound familiar.
Once is enough for many of these ladies.
The butterflies could hold clues to human infertility.
Climate change and noise pollution could silence cod and haddock chatter.