A sailor pays respect at India Gate War Memorial, Delhi. (© Adnan Abid/Reuters)

Dawn sunlight and waves at Portland Bill lighthouse, Dorset, England (© Lee Pengelly/Getty Images Plus)

Male Atlantic puffin gives his mate nesting material, Skomer Island, Wales (© Danny Green/Minden Pictures)

Christmas tree farm in Ontario, Canada (© FatCamera/Getty Images Plus)

The Pinnacles at Nambung National Park, Western Australia (© Frank Krahmer/Getty Images Plus)

Adélie penguins at Possession Island, Antarctica (© Tui De Roy/Minden Pictures)

A scooter adorned with multiple mirrors, lights, and air horns (© stocknshares/Getty Images)

Close-up of a microchip (© Bobkov Evgeniy/Shutterstock)

Golden Hall in Stockholm City Hall for today's Nobel Prize Award ceremonies (© Mikhail Markovskiy/Shutterstock)

Tengboche Monastery in the Himalayan Mountains, Nepal (© Kyle Hammons/Tandem Stills + Motion)

Icelandic sheep for the first night of the Yule Lads (© John Porter LRPS/Alamy)

Bernina Express on the Landwasser Viaduct, Graubünden, Switzerland (© Marco Bottigelli/Getty Images)

Spruce grouse in a spruce tree in Denali National Park, Alaska, USA (© Yva Momatiuk and John Eastcott/Minden Pictures)

Key monastery at Spiti valley, Himachal Pradesh (© Inigo Cia/Getty Images)

Table Mountain, Cape Town, South Africa (© 4FR/Getty Images)

Temple of Saturn in the Roman Forum, Rome, Italy (© Joe Daniel Price/Getty Images)

Annual Schwäbisch Hall Weihnachtsmarkt in the market square, Baden-Württemberg, Germany (© sack/Getty Images Plus)

Basilica of Bom Jesus, Old Goa. (© Arthur S. Ruffino/age fotostock)

Rainbow eucalyptus trees along the Hana Highway, Maui (© GlowingEarth/Getty Images Plus)

Snowflake (© TothGaborGyula/Getty Images Plus)

The Seventeen-Arch Bridge over Kunming Lake in Beijing Summer Palace, China (© Jia Wang/Getty Images)

Orchha Palace on a misty morning at sunrise (© Luigi Vaccarella/Sime/eStock Photo)

A herd of reindeer in Norway (© Lena Granefelt/plainpicture)

Sand sculpture of Santa Claus at Puri, Odisha (© Getty Images)

The Church of St. Thomas above the village of Praprotno, for Slovenia Independence and Unity Day (© Guy Edwardes/Minden Pictures)

Skating on a frozen canal near the windmills at Kinderdijk in the Netherlands (© Lourens Smak/Alamy)

Trumpeter swans at Kelly Warm Springs, near Kelly, Wyoming (© DEEPOL by plainpicture)

German ski jumper Markus Eisenbichler competing in the Four Hills Tournament, Innsbruck, Austria, on January 3, 2018 (© Daniel Karmann/picture alliance via Getty Images)

Saguaro cacti in the Sonoran Desert near Tucson, Arizona (© Jack Dykinga/Minden Pictures)

Fireworks for New Year's Eve in Backnang, Germany (© Lilly/Alamy)

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