Episodes

The most remarkable life still undiscovered on our planet will certainly be found in the sea. As new machines explore this inner universe and penetrate depths beyond our reach, we are finding creatures -- such as cephalopods -- that defy our imagination.

From the sea horse that mates in a hypnotic underwater ballet to the rodent who copulates until he literally drops dead, THE NATURE OF SEX spans the globe to illustrate how an astonishing diversity of life forms find their mates and conceive, raise, and protect their offspring.

These small whales have proved remarkably rugged and intelligent.

When it comes to zebras, it’s not all black and white. These spirited, striped African horses have rich, complex lives, as NATURE’s Horse Tigers shows.