Traditional masked man, Tshikapa, Kasai, Democratic Republic of Congo, Africa

Six different groups of native warriors, drummers, and dancers perform on Kwato Island, Papua New Guinea, Pacific

View of Fushimi Inari Shrine, Fukakusa Yabunouchicho, Fushimi Ward, Kyoto, Honshu, Japan

Emir of Daura walking around his palace, Fadar Daurama Emir's palace, Daura Emirate, Katsina state, Nigeria

Woman holding a candle in Vezelay abbey, Sainte-Marie-Madeleine Basilica, Yonne, France

Religious symbol of old Roman Missal with a wooden cross, France

Hindu priest performing puja, Temple and shrine of Batu Caves, Hindu elephant God Ganesh (Ganesha) (Ganapati), Kuala Lumpur, Malaysia

Woman with incense sticks, Guan Di Chinese Temple, Chinatown, Kuala Lumpur, Malaysia

Pink lotus flower candles symbolising human growth and development, at the Thean Hou Temple, Kuala Lumpur, Malaysia

Pilgrims at Pushkar Lake at sunrise, Pushkar, Rajasthan, India, South Asia, Asia

Good Friday procession, Enna, Sicily, Italy, Mediterranean, Europe

Male Polar Bears, Ursus maritimus, engaged in ritualistic mock fighting (serious injuries are rare), near Churchill, northern Manitoba, Hudson Bay, Canada

Adult male Polar Bears (Ursus maritimus) in ritualistic fighting stance (injuries are rare) near Churchill, Manitoba, Canada.

Male Polar Bears, Ursus maritimus, beginning to engage in ritualistic mock fighting (serious injuries are rare), near Churchill, northern Manitoba, Hudson Bay, Canada

Male Polar Bears, Ursus maritimus, engaged in ritualistic mock fighting (serious injuries are rare), near Churchill, northern Manitoba, Hudson Bay, Canada

Male Polar Bears, Ursus maritimus, beginning to engage in ritualistic mock fighting (serious injuries are rare), near Churchill, northern Manitoba, Hudson Bay, Canada

Blue-footed booby (Sula nebouxii) in ritualistic courtship display in the Galapagos Island Group, Ecuador. MORE INFO: The Galapagos are a nesting and breeding area for blue-footed boobies.

Male Polar Bears, Ursus maritimus, engaged in ritualistic mock fighting (serious injuries are rare), near Churchill, northern Manitoba, Hudson Bay, Canada

Male Polar Bears, Ursus maritimus, engaged in ritualistic mock fighting (serious injuries are rare), near Churchill, northern Manitoba, Hudson Bay, Canada

Male Polar Bears, Ursus maritimus, engaged in ritualistic mock fighting (serious injuries are rare), near Churchill, northern Manitoba, Hudson Bay, Canada

Adult male Polar Bears, Ursus maritimus, in ritualistic fighting (this almost never leads to serious injury) near Churchill, northern Manitoba, Hudson Bay, Canada

Adult male Polar Bears (Ursus maritimus) in ritualistic fighting stance (injuries are rare) near Churchill, Manitoba, Canada.

Blue-footed booby (Sula nebouxii) in ritualistic courtship display in the Galapagos Island Group, Ecuador. MORE INFO: The Galapagos are a nesting and breeding area for blue-footed boobies.

Adult male Polar Bears (Ursus maritimus) in ritualistic fighting stance (injuries are rare) near Churchill, Manitoba, Canada.

Blue-footed booby (Sula nebouxii) in ritualistic courtship display in the Galapagos Island Group, Ecuador. MORE INFO: The Galapagos are a nesting and breeding area for blue-footed boobies.

The Bull Jumping Ceremony is conducted by several tribes in the Lower Omo Valley and is the most important ceremony in a tribal man's life.The ceremony is about hierarchy and membership in the tribe and typically involves a young man who undergoes a number of rituals before he leaps onto and runs rapidly over a series of cattle held by other men who have recently bull-jumped. Once the jumping is completed, the bull-jumper is a man in the eyes of the tribe. An important part of the ceremony is a ritualistic whipping, which women actively seek out from certain men known as Mazha. Dimeka, Omo Valley, Ethiopia, 2010

Portrait of native man, Papua New Guinea, New Britain, Kimbe Bay