A storm passes over the bright colors of autumn in Denali National Park & Preserve, Alaska. PacificStock
A Humpback Whale returns to the depths of Alaska's Inside Passage as the sun begins to set, Stephens Passage, near Juneau. PacificStock
Phoenix Mars Lander’s solar panel and the lander’s Robotic Arm with a sample in the scoop. StocktrekImages
Paplow Harvesting Company custom combines a wheat field, near Ray; North Dakota, United States of America PacificStock
Grand Teton range in autumn, Grand Teton National Park; Wyoming, United States of America PacificStock