Oak tree canopy in Roudsea Wood, Cumbria, England (© Chris Mattison/Minden Pictures)(Bing Australia)

[20160428] - 'Oak tree canopy in Roudsea Wood, Cumbria, England (© Chris Mattison/Minden Pictures)(Bing Australia)'

Prairie smoke blossoms (© Jim Brandenburg/Minden Pictures)(Bing Australia)

[20160427] - 'Prairie smoke blossoms (© Jim Brandenburg/Minden Pictures)(Bing Australia)'

Grampians National Park (Gariwerd) in Victoria, Australia (© Ingo Oeland/Alamy)(Bing Australia)

[20160426] - 'Grampians National Park (Gariwerd) in Victoria, Australia (© Ingo Oeland/Alamy)(Bing Australia)'

Sunlight reflecting on rice paddy terraces, Yuanyang County, China (© Eastphoto/age fotostock)(Bing Australia)

[20160425] - 'Sunlight reflecting on rice paddy terraces, Yuanyang County, China (© Eastphoto/age fotostock)(Bing Australia)'

Oasis town of Taghit, Algeria (© George Steinmetz/Corbis)(Bing Australia)

[20160424] - 'Oasis town of Taghit, Algeria (© George Steinmetz/Corbis)(Bing Australia)'

American bison on the Little Missouri River in Theodore Roosevelt National Park, North Dakota (© Tom & Pat Leeson/Science Photo Library)(Bing Australia)

[20160423] - 'American bison on the Little Missouri River in Theodore Roosevelt National Park, North Dakota (© Tom & Pat Leeson/Science Photo Library)(Bing Australia)'

Kilauea erupting, Hawai’i Volcanoes National Park (© Art Wolfe/Getty Images)(Bing Australia)

[20160422] - 'Kilauea erupting, Hawai’i Volcanoes National Park (© Art Wolfe/Getty Images)(Bing Australia)'

Bloom of microscopic phytoplankton scattered across the surface of the Black Sea (© NASA/Corbis)(Bing Australia)

[20160421] - 'Bloom of microscopic phytoplankton scattered across the surface of the Black Sea (© NASA/Corbis)(Bing Australia)'

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