Arch of Septimius Severus in the Roman Forum (© Pietro Canali/eStock Photo) - Bing Wallpaper on March 15, 2019

View of Paris, France, with the Eiffel Tower (© Funny Solution Studio/Shutterstock)

Alpine eucalypt bark in Tasmania, Australia (© Australian Scenics/Getty Images)

Auroville, India (© Vikram Ramakrishnan/Shutterstock)

A rufous-tailed hummingbird in Costa Rica (© Juan Carlos Vindas/Getty Images)

Sap-collecting buckets in Brome-Missisquoi, Quebec, Canada (© Roderick Chen/SuperStock)

Missisquoi的树汁收集桶，加拿大魁北克 (© Roderick Chen/SuperStock)

目黑川上盛开的樱花，日本东京 (© taketan/Getty Images)

Sea otters in Prince William Sound, Alaska (© Patrick Endres/plainpicture)

埃克森瓦尔迪兹漏油事件30年后，阿拉斯加威廉王子湾的海獭 (© Patrick Endres/plainpicture)

美国南部上空云层中出现的瀑布状空洞图像，美国国家航空航天局Terra卫星拍摄 (© NASA)

塔什库尔干草原上的水车，中国新疆塔吉克自治县 (© Ratnakorn Piyasirisorost/Getty Images)

Crocus flowers (© Lorianne Ende/Getty Images)

番红花 (© Lorianne Ende/Getty Images)

市政厅广场上庆祝圣何塞节的烟花，西班牙巴伦西亚 (© Helena G.H/Shutterstock)

Light from sunrise through a sea cave on the Isle of Skye, Scotland (© Luca Benini/PLM Collection/Offset)

Chital (spotted deer), Kanha National Park, Madhya Pradesh, India (© Pete Oxford/Minden Pictures)

Circular agricultural fields in Morgan County, Colorado (© Jim Wark/Getty Images)

A view of Uranus taken from spacecraft Voyager 2 in 1986 (© NASA)

1986年由太空探测器旅行者2号拍摄的天王星照片 (© NASA)

Leopard snoozing in a tree in Namibia (© M. Watsonantheo/SuperStock)

Minnestimma Lake, Banff, Alberta, Canada (© Paul Zizka/Aurora Photos)

皇家高地燧发枪团在悉尼歌剧院屋顶演奏风笛 (© James D Morgan/Shutterstock)

Loup of Fintry waterfall on the River Endrick, Scotland (© Damian Shields/Offset)

Wildflowers in bloom at Lost Dutchman State Park in Arizona (© Tim Fitzharris/Minden Pictures)

Cefalù on the Tyrrhenian coast in Sicily, Italy (© Tuul & Bruno Morandi/eStock Photo)

位于地中海的切法卢，意大利西西里岛 (© Tuul & Bruno Morandi/eStock Photo)

Elephant herd in Damaraland District, Namibia (© Michael Poliza/Getty Images)

A fin whale in the waters off the Azores (© Luis Quinta/Minden Pictures)

Vinicunca Mountain in the Cusco Region of Peru (© sorincolac/Getty Images)