The ancient city of Nara features many world heritage sites. But the most endearing attraction may be the cute and friendly deer. They're everywhere, from temple and shrine precincts and parks to streets and shopping areas. And they're hungry, each consuming about 5 kilograms of vegetation daily, not to mention deer crackers offered by tourists. But don't go mistaking them for tame creatures simply begging for handouts. They're wild animals, and according to Shinto lore, messengers of the gods.

The ancient city of Nara features many world heritage sites. The most endearing attraction, however, may be the cute and friendly deer. Look out for those pointy antlers in fall though! Stags are quite aggressive in the rutting season, posing a real risk to tourists and passing cars. As a result, most bucks have their antlers sawed off for safety. But don't think for a moment that this eliminates their chances with the does. With or without their racks, males continue battling for dominance.

Divers descend into the nighttime morass of a hundred thousand small slimy creatures extending in all directions. It's a squid run, a rarely seen soiree now at great risk due to climate change. The Darwin team has combed the depths searching for clues to explain this massive gathering. The result? Incredible footage of a range of mating behaviors, from aggressive multi-armed battles and intimate pairings to a mother's delicate depositing of egg casings in a blossom-like pattern on the sea floor.