Solvin Zankl / A Costa Rican researcher monitors the temperature in the developing sea turtle nests at Ostional beach, Costa Rica, November 2009. ^^^ Sea turtles have, like many other reptiles, temperature-dependent...

Tim Laman / Orangutan researcher, Cheryl Knott, climbing rope into giant canopy tree with stranger fig tree roots growing down its side, Gunung Palung National Park, Borneo, West Kalimantan, Indonesia.

David Woodfall / Arctic terns (Sterna paradisaea) in flight with a researcher walking, in mist, Northumberland, UK, June 2009

Wild Wonders of Europe / Unterthiner / Researcher looking through binoculars, collecting data about bison, Bialowieza NP, Poland, February 2009

Wild Wonders of Europe / Unterthiner / Researcher holding tracking antennae standing on the back of truck, collecting data on bison, Bialowieza NP, Poland, February 2009

Richard Herrmann / Research submersible submerging to explore hot vents, Danzante Island, Baja California, Mexico

Ingo Arndt / Researcher Jim Lewis curator of the true bug collection at INBio, San Jose, Costa Rica

Ingo Arndt / Two scientists from the Alfred-Wegener Institute, collecting tide pool samples, North sea, Helogland, Germany

Suzi Eszterhas / Polar Bear (Ursus maritimus) three to four month old cub peeking over mother's body while she is tranquilized by researchers, vulnerable, Wapusk National Park, Manitoba, Canada

John Cancalosi / Researcher tagging White stork chicks at nest {Ciconia ciconia} Spain

Mark Moffett / Meg Lowman strides across a canopy raft to collect insect samples with her net as Bruce Rinker inspects the previous catch, Cameroon

Mark Moffett / Giant Weta (Deinacrida heteracantha) female held by researcher Mike Meades, this largest Weta species is found only on Little Barrier Island, New Zealand Weta in hand, New Zealand