Anup Shah / Aerial view of Ol Doinyo Lengai (The Mountain of God) Volcano, Rift Valley, Tanzania. Note- light gray flows known as 'squeeze-ups' from the highly fluid lava, still active.

Steven David Miller / Agile wallaby (Macropus agilis) female cleaning herself with joey squeezed into pouch. Nitmiluk National Park, Northern Territory, Australia.

Steven David Miller / Agile wallaby (Macropus agilis) female with joey in pouch, joey's limbs no longer fit in pouch. Nitmiluk National Park, Northern Territory, Australia.

Cyril Ruoso / Baka man holding leaf to collect honey squeezed from hand, South East Cameroon, July 2008.

Anup Shah / Aerial view of Ol Doinyo Lengai'(The Mountain of God) Volcano, Rift Valley, Tanzania. Note - light gray flows known as 'squeeze-ups' from the highly fluid lava, still active.

David Fleetham / Cone shell hermit crab (Ciliopagurus strigatus) inhabiting a cone shell, Hawaii, Pacific Ocean. Crab has a specialized flat body that allows it to squeeze into the narrow opening of the shell.

Tony Wu / Male Siberian flying squirrel (Pteromys volans orii) pushed out of nest by female. Male dragging some soft nesting material along with him. Hokkaido, Japan. March.

Milan Radisics / Female Red fox (Vulpes vulpes) squeezing through a hole in the fence to enter the backyard, Hungary. March.

Milan Radisics / Female Red fox (Vulpes vulpes) entering the backyard through the hole it has made in the fence, Hungary, March.

Milan Radisics / Female Red fox (Vulpes vulpes) entering the backyard through the hole it has made in the fence, Hungary, March.