Lisa Hoffner / Orphan baby Elephants (Loxodonta africana) playing football with their keeper. David Sheldrick Wildlife Trust Nairobi Elephant Nursery, Kenya, July 2010. Model released.

Anup Shah / Bonobo (Pan paniscus) mature male 'Makali', portrait, Lola Ya Bonobo Sanctuary, Democratic Republic of Congo. October.

Anup Shah / Bonobo (Pan paniscus) baby aged 3 months sucking it's mother's finger, Lola Ya Bonobo Sanctuary, Democratic Republic of Congo. October.

Lisa Hoffner / A young orphan Elephant (Loxodonta africana) being bottle fed milk by its keeper. David Sheldrick Wildlife Trust Nairobi Elephant Nursery, Kenya, July 2010. Model released.

Anup Shah / Bonobo (Pan paniscus) adolescent male reaching out from a tree, portrait, Lola Ya Bonobo Sanctuary, Democratic Republic of Congo. October.

Lisa Hoffner / A group of rescued orphan baby Elephants (Loxodonta africana). David Sheldrick Wildlife Trust Nairobi Elephant Nursery, Kenya, July 2010.

Anup Shah / Bonobo (Pan paniscus) mature male 'Fizi' aged approx 15 years, showing aggression, Lola Ya Bonobo Sanctuary, Democratic Republic of Congo. October.

Lisa Hoffner / Orphan baby Elephants (Loxodonta africana) being taken for a walk by their keepers. David Sheldrick Wildlife Trust Nairobi Elephant Nursery, Kenya, July 2010.

Luiz Claudio Marigo / People taking photographs of a Brown-throated Three-toed Sloth (Bradypus variegatus) in Parque Centenario, downtown Cartagena de Indias city, Magdalena Department, Colombia, February 2011.

Nature Production / Pygmy Marmoset (Cebuella pygmaea) clinging to fingers, captive

Bryan and Cherry Alexander / Dramatic 'Undulatus asperatus' cloud formation as a storm builds at dawn over Qaanaaq, Inglefield Bay. Northwest Greenland, September 2008. This cloud formation was first proposed as a new type of clo...

Georgette Douwma / Hawksbill Turtle (Eretmochelys imbricata) swimming down after taking a breath. Rinca, Komodo National Park, Indonesia.