Aurora australis over the Halley VI Research Station in Antarctica (© Stuart Holroyd/Alamy)

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)

Two rhinos and an oxpecker bird in the Amakhala Game Reserve in South Africa (© Robert Harding World Imagery/Offset)

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

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

｢アシュダウンの森」イギリス, イースト・サセックス (© Tim Stocker Photography/Getty Images)

一枚微芯片的特写 (© Bobkov Evgeniy/Shutterstock)

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 (© Yva Momatiuk and John Eastcott/Minden Pictures)

桌山，南非开普敦 (© 4FR/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)

Bearberry (arctostaphylos) and lichens, Nunavik, Que. (© Dominique Braud/Dembinsky Photo Associates/Alamy Stock Photo)

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

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

Snowflake (© TothGaborGyula/Getty Images Plus)

华沙的圣诞节日装饰，波兰 (© David Milsen/Alamy)

Holiday decorations in Warsaw, Poland, for Christmas (© David Milsen/Alamy)

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)

Aerial view of a residential area on a snow day during blue hour, Toronto (© Katrin Ray Shumakov/Getty Images)

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

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

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