Luiz Claudio Marigo / Meeting of waters of the River Solimoes and darker River Negro, Amazonas, Brazil. Rio

Doug Perrine / Traditional men's meeting house, Palau, Micronesia

Jim Brandenburg / Aerial view of Namib Desert meeting Atlantic Ocean at the Skeleton Coast, Namibia

Gerry Ellis / African Elephant (Loxodonta africana) young bulls engage in greeting ritual, Amboseli National Park, Kenya

Mark Moffett / Green and Black Poison Dart Frog (Dendrobates auratus) meets a Tarantula, Taboga Island, Panama Tarantulas eat frogs but avoid Poison Dart Frogs, yet on Taboga, such encounters are common and Tarantul...

Thomas Mangelsen / Polar Bear (Ursus maritimus) investigating chained sled dog, Churchill, Manitoba, Canada

Heidi & Hans-Juergen Koch / Colubrid Snake (Elaphe sp) two making initial contact, using tongue (Nasovomeral sense) to identify friend, enemy, or prey

George Sanker / White-tailed deer (Odocoileus virginianus) fawn face to face with Wild turkey (Meleagris gallopavo), in woodland clearing. Acadia National Park, Maine, USA. August.

Mike Potts / Glacier meeting Southern ocean on coast of Buckle Island, Balleny Islands, East Antarctica. January 2018.

Cyril Ruoso / Przewalski horse (Equus ferus przewalskii) stallion facing stallion in acclimatisation enclosure. Stallion in enclosure will be released into wild after a year. Great Gobi B Strictly Protected Area, M...

Tui De Roy / Red-footed booby (Sula sula), adults and chick at nest. Gardner Islet, Floreana Island, Galapagos.

Ashley Cooper / Solar panels n the Quaker Meeting House in Keswick, Lake District, UK. March 2012