Enrique Lopez-Tapia / Woman with lip plate, which signifies she is a married woman, Mursi tribe, Mago National Park. Ethiopia, November 20144

Christophe Courteau / Pair of West African giraffes {Giraffe camelopardis peralta}. Male on right, female on left.

Solvin Zankl / Bridegroom's Oak tree. Traditionally people seeking romantic partners would post a letter into the hole of this tree, which can be taken out and replied to by others, the postal service now also d...

Steve O. Taylor (GHF) / Wife of Toubou guide in Sigadine, Niger, 2005.

Juergen Freund / Circle or C-hooks vs. traditional J-hooks of longline tuna fishing boat of Nutrindo Freshfood International, Sulawesi, Indonesia, October 2009. Changing from the classic J hook to C hooks can dramatic...

Piotr Naskrecki / False Scorpion riding Katydid antenna to find new location or mating partners, Costa Rica

Piotr Naskrecki / False Scorpion master stowaways, often attach themselves to bodies of flying insects in order to find new locations or mating partners, Costa Rica

Doug Perrine / Hunting partners - Peacock grouper + Moray eel, Maldives {Cephalopholis argus}

Eric Baccega / Portrait of a Kayan Lahwi woman with her husband. The Long Neck Kayan (also called Padaung in Burmese) are a sub-group of the Karen ethnic people from Burma. They wear spiral coils around their neck a...