Common rosefinch male perching (© Arterra Picture Library/Alamy)(Bing United States)

Common rosefinch male perching (© Arterra Picture Library/Alamy)(Bing United States)

Dongdaemun Design Plaza in Seoul, South Korea (© Grant Faint/Offset)(Bing United States)

Dongdaemun Design Plaza in Seoul, South Korea (© Grant Faint/Offset)(Bing United States)

Pine sapling in burnt heather at Strabrechtse Heide, Netherlands (© Heike Odermatt/Minden Pictures)(Bing United States)

Pine sapling in burnt heather at Strabrechtse Heide, Netherlands (© Heike Odermatt/Minden Pictures)(Bing United States)

Springtime near the village of Aínsa-Sobrarbe, Spain (© Hans Kruse/500px)(Bing United States)

Springtime near the village of Aínsa-Sobrarbe, Spain (© Hans Kruse/500px)(Bing United States)

Great crested grebes with chick in Vlaardingen, Netherlands (© Jasper Doest/Minden Pictures)(Bing United States)

Great crested grebes with chick in Vlaardingen, Netherlands (© Jasper Doest/Minden Pictures)(Bing United States)

Storm near Lamar, Colorado (© john finney photography/Getty Images)(Bing United States)

Storm near Lamar, Colorado (© john finney photography/Getty Images)(Bing United States)

Yinlianzhui Waterfall near Anshun, Guizhou Province, China (© Top Photo Group/Getty Images)(Bing United States)

Yinlianzhui Waterfall near Anshun, Guizhou Province, China (© Top Photo Group/Getty Images)(Bing United States)

Black bear in the Tongass National Forest of Alaska (© Mark Kelley/Tandem Stills + Motion)(Bing United States)

Black bear in the Tongass National Forest of Alaska (© Mark Kelley/Tandem Stills + Motion)(Bing United States)

Equinox at the Salk Institute for Biological Studies, San Diego, California (© Sameer Mundkur/500px)(Bing United States)

Equinox at the Salk Institute for Biological Studies, San Diego, California (© Sameer Mundkur/500px)(Bing United States)

An ice tunnel inside Matanuska Glacier, Alaska (© Lynn Wegener/Offset)(Bing United States)

An ice tunnel inside Matanuska Glacier, Alaska (© Lynn Wegener/Offset)(Bing United States)

African wild dogs in Kruger National Park, South Africa (© Richard Du Toit/Minden Pictures)(Bing United States)

African wild dogs in Kruger National Park, South Africa (© Richard Du Toit/Minden Pictures)(Bing United States)

Five Fingers Strand near Malin Head, Ireland (© Cahir Davitt/age fotostock)(Bing United States)

Five Fingers Strand near Malin Head, Ireland (© Cahir Davitt/age fotostock)(Bing United States)

Interior of the Broch of Mousa on Mousa Island, Scotland (© National Geographic Creative/Alamy)(Bing United States)

Interior of the Broch of Mousa on Mousa Island, Scotland (© National Geographic Creative/Alamy)(Bing United States)

Lands End in San Francisco, California (© Toby Harriman/Nimia)(Bing United States)

Lands End in San Francisco, California (© Toby Harriman/Nimia)(Bing United States)

Enhanced image of a cross section of a pine stem (© Garry DeLong/Getty Images)(Bing United States)

Enhanced image of a cross section of a pine stem (© Garry DeLong/Getty Images)(Bing United States)

A Holi festival in Washington, DC (© Devesh Tripathi/500px)(Bing United States)

A Holi festival in Washington, DC (© Devesh Tripathi/500px)(Bing United States)

A blue-footed booby dives off San Cristóbal Island, Ecuador (© Tui De Roy/Minden Pictures)(Bing United States)

A blue-footed booby dives off San Cristóbal Island, Ecuador (© Tui De Roy/Minden Pictures)(Bing United States)

Blanchard Springs Caverns in Arkansas (© Garret Suhrie/Tandem Stills + Motion)(Bing United States)

Blanchard Springs Caverns in Arkansas (© Garret Suhrie/Tandem Stills + Motion)(Bing United States)

Hveravellir hot spring on Kjölur plateau, Iceland (© Mliberra/Getty Images)(Bing United States)

Hveravellir hot spring on Kjölur plateau, Iceland (© Mliberra/Getty Images)(Bing United States)

Svalbard Satellite Station, Svalbard archipelago, Norway (© Tim E White/Getty Images)(Bing United States)

Svalbard Satellite Station, Svalbard archipelago, Norway (© Tim E White/Getty Images)(Bing United States)

Women suffragists marching down Pennsylvania Avenue on March 3, 1913, Washington, DC (© Library of Congress)(Bing United States)

Women suffragists marching down Pennsylvania Avenue on March 3, 1913, Washington, DC (© Library of Congress)(Bing United States)

Desert View Watchtower, Grand Canyon National Park, Arizona (© Babak Tafreshi/National Geographic/Getty Images)(Bing United States)

Desert View Watchtower, Grand Canyon National Park, Arizona (© Babak Tafreshi/National Geographic/Getty Images)(Bing United States)

Valais Blacknose sheep in Valais, Switzerland (© Alessandra Meniconzi/Solent News/REX/Shutterstock)(Bing United States)

Valais Blacknose sheep in Valais, Switzerland (© Alessandra Meniconzi/Solent News/REX/Shutterstock)(Bing United States)

A glasswing butterfly perched on a leaf (© Corianna Heise/Alamy)(Bing United States)

A glasswing butterfly perched on a leaf (© Corianna Heise/Alamy)(Bing United States)

Tasman Lake on South Island, New Zealand (© UpdogDesigns/iStock/Getty Images Plus)(Bing United States)

Tasman Lake on South Island, New Zealand (© UpdogDesigns/iStock/Getty Images Plus)(Bing United States)

A herd of male springboks in the Kalahari region of South Africa (© Minden Pictures/Masterfile)(Bing United States)

A herd of male springboks in the Kalahari region of South Africa (© Minden Pictures/Masterfile)(Bing United States)

Shiprock in the Navajo Nation of New Mexico (© Wild Horizon/Getty Images)(Bing United States)

Shiprock in the Navajo Nation of New Mexico (© Wild Horizon/Getty Images)(Bing United States)

Somme River estuary, France (© Philippe Frutier/plainpicture)(Bing United States)

Somme River estuary, France (© Philippe Frutier/plainpicture)(Bing United States)