Detail of carving inside one of the 18 Udayagiri caves, used as residences for Jain monks 2000 years ago, Bhubaneshwar, Orissa, India, Asia

Carving on one of the 18 Udayagiri caves, residences for Jain monks in the time of King Kharavela 2000 years ago, Bhubaneshwar, Orissa, India, Asia

Carving on one of the 18 Udayagiri caves, residences for Jain monks in the time of King Kharavela 2000 years ago, Bhubaneshwar, Orissa, India, Asia

Namibia oranganda community centre, windhoek. A place which looks after children with severe disabilities. Director of centre with an 18-year- girl with ms. maryknoll

orca/ killer whale (Orcinus orca) 'Luna' (L98), 5-year old lone male interacting with Ingrid Visser (photo by T. Hardie) in Nootka Sound, West Vancouver Island, Canada, North Pacific.

A 18 year old teenager standing on top of an American Schoolbus and looking down the Colorado River towards the Fischer Towers, Utah Scenic Highway 128, Moab, Utah, USA

An 18 year old teenager with a surfboard standing on top of an American Schoolbus at the California welcome sign, Interstate 15, Nevada, California, USA

Portrait of a girl of Indian ethnicity at a Hindu Festival in Georgetown, Guyana, South America

A woman reading a book outdoors

Young woman by the sea, Four Mile Beach, Port Douglas, Daintree National Park, Queensland, Australia

A woman with soap bubbles

Portrait of a girl of Indian ethnicity at a Hindu Festival in Georgetown, Guyana, South America

A woman relaxing on the grass

Japanese teenagers with blonde dyed hair, wearing the typical fashion taking photos in Maruyama Park, Kyoto, Japan, Asia

Girl with hat on a white sandy beach with turquoise sea lying on a blue towel

Young woman in the sea, Whitehaven Beach, Whitsunday Island, Whitsunday Islands National Park, Queensland, Australia

Reading girl sitting in a chair in a field of linen

Young woman in the sea, Playa Bajo Negro beach, Corralejo, Fuerteventura, Canary Islands, Spain, Europe

Reading girl sitting in a chair in a field of linen

Teenager, couple rowing in a rowing boat at a lake, 18 years, Irrsee, Upper Austria, Austria, Europe

Couple in love lying on an air mattress in the water, 18 years, Mondsee, Upper Austria, Austria, Europe

Girl, 17 years, reading a book, lying on the floor

Four teenagers on an air mattress in water have fun bathing, 18 years, Mondsee, Upper Austria, Austria, Europe

Three teenagers sitting in a rowing boat, 18 years, Irrsee, Upper Austria, Austria, Europe

Four teenagers in the water have fun swimming, 18 years, Mondsee, Upper Austria, Austria, Europe

Young woman lying in the dunes on the beach, Brittany region, France, Europe

Teenager, young woman lies on an air mattress in the water, 18 years, Irrsee, Upper Austria, Austria, Europe

Two teenagers play with water polo in a lake, 18 years, Mondsee, Upper Austria, Austria, Europe

Chris McNamara uses a sky hook to move higher while rock climbing Mescalito on El Capitan in Yosemite National Park, California. By the time McNamara was 18 years old he had rock climbed the 3000 foot high El Capitan more than 50 times. El Capitan is considered a big wall and usually requires aid climbing.

A gray whale swims near tourists in a boat in Ojo de Liebre Lagoon near the town of Guerrero Negro in Mexico's southern Baja California state, February 18, 2009. The Gray Whale emigrate every year from the North American Pacific Coast from arctic seas to the lagoons of Baja California, Mexico for mating and calving. The whales make one of the longest of all mammalian migrations, averaging 10,000-14,000 miles, Mexico

A gray whale swims near tourists in Ojo de Liebre Lagoon near the town of Guerrero Negro in Mexico's southern Baja California state, February 18, 2009. The Gray Whale emigrate every year from the North American Pacific Coast from arctic seas to the lagoons of Baja California, Mexico for mating and calving. The whales make one of the longest of all mammalian migrations, averaging 10,000-14,000 miles, Mexico