Leaves with hoarfrost in the Black Forest, Freiburg, Baden-Württemberg, Germany (© Per-Andre Hoffmann/Cavan Images)

猫鼬一家簇拥在一起 (© stefbennett/Shutterstock)

拉帕努伊国家公园中阿胡汤加里基的摩艾石像，智利复活节岛 (© blickwinkel/Alamy)

Moai statues at Ahu Tongariki in Rapa Nui National Park, Easter Island, Chile (© blickwinkel/Alamy)

Sigiriya Rock, Central Province, Sri Lanka (© Jeremy Woodhouse/Getty Images)

Bubbles in the ice of Abraham Lake in Alberta, Canada (© robertharding/Alamy)

魁北克老城区的景色，加拿大 (© RENAULT Philippe/age fotostock)

【今日元宵节】祝大家平安健康，团团圆圆！ (© Sino Images/Getty Images)

Lantern Festival in Pingxi, Taiwan (© Jung-Pang Wu/Getty Images)

Sunset over Los Argaos mountains, Picos de Europa, Asturias, Spain (© jregueiro/Getty Images)

Sunrise at Mount Fuji, Japan (© Juan Paulo Gutierrez/Getty Images)

Marbled white butterflies, Alsace, France (© Eric Ferry/Minden Pictures)

Frozen amphitheater of columnar basalt walls flanking Abiqua Falls, Oregon (© Joshua Meador/Tandem Stills + Motion)

A heart-shaped hole in the rock formation of Calanques de Piana in Corsica, France (© joningall/Getty Images)

薄雾笼罩的河流中的丹顶鹤，日本北海道 (© Paul & Paveena Mckenzie/Getty Images)

Red-crowned cranes in a mist-covered river, Hokkaido, Japan (© Paul & Paveena Mckenzie/Getty Images)

Pluto's crescent imaged by NASA's New Horizons interplanetary space probe (© NASA/JHUAPL/SWRI/Science Photo Library)

Pluto's crescent imaged by NASA's New Horizons interplanetary space probe (© NASA/JHUAPL/SWRI/Science Photo Library)

Wandering albatross pair, South Georgia Island (© David Tipling Photo Library/Alamy)

Rifugio Lagazuoi above the clouds with Monte Pelmo in the background, Dolomites, Italy (© Nicolo Miana/eStock Photo)

Avenue of Birch Trees near Uffing am Staffelsee, Bavaria, Germany (© Reinhard Schmid/eStock Photo)

人们在布雷纳德的加尔湖上冰钓，明尼苏达州 (© Robert Benson/Cavan)

朝圣者将风马旗扔向甘登寺上方的空中为新年祈福，中国西藏 (© Ian Cumming/plainpicture)

｢ガル湖の氷上穴釣り｣米国ミネソタ州, ブレイナード (© Robert Benson/Cavan)

阿卡迪亚国家公园，缅因州 (© emptyclouds/Getty Images)

北极国家野生动物保护区里的一只雌性北极熊和她的幼崽，阿拉斯加 (© Steven Kazlowski/Minden Pictures)

冬天的水獭溪，佛蒙特州布兰登 (© Caleb Kenna/Offset)

一只华莱士飞蛙掠过森林地面 (© Stephen Dalton/Minden Pictures)

大西洋和特内里费山脉上空的流云，西班牙加那利群岛 (© MikeMareen/iStock/Getty Images Plus)