Penitents, Semana Santa (Holy Week) procession, Salamanca, Castilla y Leon (Old Castile), Spain, Europe

Two lionesses (Panthera leo) and two five week old cubs in the grass, Tanzania, East Africa, Africa

Rissos Dolphin (Grampus griseus) adult and very young calf surfacing. Monterey, California, Pacific Ocean. MORE INFO: This calf still displays foetal folds from when it was curled up inside the womb. It is probably only a couple of weeks old.

Smooth newt embryo (Triturus vulgaris). Two weeks old - wrapped in pond weed (Elodia crispa), Bristol UK. (RR)

Two 2 weeks old Arctic Ground Squirrels (Urocitellus parryii) observe their surroundings. Yukon Territory, Canada

Gray fox (Urocyon cinereoargenteus), kit, nine weeks old, looking out of a tree trunk, Montana, USA, North America

Gray foxes (Urocyon cinereoargenteus), two kits, nine weeks old, looking out of a tree trunk, Montana, USA, North America

Sudan cheetah (Acinonyx jubatus soemmeringii), two young animals, siblings, sitting, ten weeks old, occurrence Sudan, captive

Cheetahs (Acinonyx jubatus), six-week-old cheetah cub playing with his mother, Maasai Mara National Reserve, Narok County, Kenya, Africa

Stephan Begay, five week old Native American Indian baby naps swaddled on a backboard at home on the Navajo Reservation in Northeastern Arizona on March 22, 2007. The baby's mother is Hopi and the father is Navajo, so the baby is part of two tribes. There is a small Hopi Reservation in Kykotsmovi Arizona that is located within the very large Navajo reservation in the northeastern corner of the state, yet intermarriage is rare. Babies are kept on traditional backboards until they start to crawl.

Two young altar boys fill a 200-year-old incensor for a reenactment of the washing of the apostles' feet by Jesus on Holy Thursday in Ouro Preto, a colonial Brazilian city noted for its baroque architecture.

Caracal (Caracal caracal) , Occurs in Africa and Asia, Young animals 9 weeks old, in the grass, Captive.

Caracal (Caracal caracal) , Occurs in Africa and Asia, Young animal 9 weeks old, in the grass, Captive.

Caracal (Caracal caracal) , Occurs in Africa and Asia, Young animals 9 weeks old, on the rocks, Captive.

Caracal (Caracal caracal) , Occurs in Africa and Asia, Young animals 9 weeks old, in the grass, Captive.

Cheetah (Acinonyx jubatus), female and 8 weeks old, Masai-Mara National Reserve, Kenya

Caracal (Caracal caracal) , Occurs in Africa and Asia, Young animals 9 weeks old, on the rocks, Captive.

Caracal (Caracal caracal) , Occurs in Africa and Asia, Young animals 9 weeks old, on the rocks, Captive.