Isabella Rosellini strikes again. We've mentioned this series before, but now it's back with the next installment of bizarre and beautiful videos.

The 'Why Vagina' video touches on something we've also explored on Radiolab.

On a personal note, I grew up with ducks as pets. As anyone who has had a ringside view of duck mating can probably tell you, the activities that I observed in our yard between the ducks were terrifying and violent. As an adult, learning about the ways in which female ducks control reproduction allows me to revisit those traumatic fowl memories in a new light.

Season 2 of Green Porno focuses on sex in the underwater world, where gender is a much more complicated and fluid concept then us landlubbers usually imagine. We can only hope that Rosselini will move on to even stranger territory in a future season. Like slime molds, which can have 13 genders.