Jeff Foott / Waterfall and river in canyon, Calf Creek Falls, Grand Staircase-Escalante National Monument, Utah

Jeff Foott / Trees in fall near Calf Creek Falls, Grand Staircase-Escalante National Monument, Utah

Jack Dykinga / Cottonwood (Populus fremontii) trees in autumn at sunset, forming a sinuous line of yellow trees. Deer Creek Canyon, Grand Staircase-Escalante National Monument, Utah, USA, October.

Jack Dykinga / Cottonwood (Populus fremontii) trees forming a sinuous line of yellow trees at sunset, in Deer Creek Canyon, Grand Staircase-Escalante National Monument, Utah, USA

Cyril Ruoso / Inmates of the Cedar Creek Corrections Center raising endangered Oregon spotted frog (Rana pretiosa) Prisoners in this facility are raising endangered frogs for release in the wild, as part of the Sus...

Yva Momatiuk & John Eastcott / Climber climbing rock, Indian Creek, Utah

Chien Lee / Stream in lowland rainforest, Masoala National Park, Antsiranana, Madagascar

Matthias Breiter / Black Bear (Ursus americanus) sleeping in tree in temperate rainforest, Anan Creek, Tongass National Forest, Alaska

Matthias Breiter / Black Bear (Ursus americanus) sleeping in tree in temperate rainforest, Anan Creek, Tongass National Forest, Alaska

Matthias Breiter / Black Bear (Ursus americanus) in tree in temperate rainforest, Anan Creek, Tongass National Forest, Alaska

Matthias Breiter / Grizzly Bear (Ursus arctos horribilis) with Pink Salmon (Oncorhynchus gorbuscha) prey, Anan Creek, Tongass National Forest, Alaska

Matthias Breiter / Black Bear (Ursus americanus) mother and cub in temperate rainforest, Anan Creek, Tongass National Forest, Alaska