Cross-section of a fossilized ammonite shell (© Marianna Armata/Getty Images)

Marigolds decorate a cemetery in Patzcuaro, Michoacan, Mexico, for a Day of the Dead ceremony (© Daniel Elizalde S/Shutterstock)

Moon jelly and an aggregation of stingless golden jellyfish in a landlocked marine lake, Raja Ampat, West Papua, Indonesia (© Alex Mustard/Minden Pictures)

Lanterns illuminated for the Diwali festival, Mumbai, India (© RAMNIKLAL MODI/Shutterstock)

Pont Rouge (Red Bridge) over the Palmer River in Sainte-Agathe-de-Lotbinière, Quebec, Canada (© Jean Surprenant/Getty Images)

Female numbat in Brookton, Western Australia, Australia (© Martin Willis/Minden Pictures)

Mack Arch Rock at sunrise on the southern Oregon coast (© Dennis Frates/Alamy)

Polar bear investigating camera, Churchill, Manitoba, Canada (© Matthias Breiter/Minden Pictures)

Ancient rock tombs carved into the cliff near Dalyan, Turkey (© Reinhard Schmid/eStock Photo)

Ancient rock tombs near Dalyan, Turkey (© Reinhard Schmid/eStock Photo)

Nohsngithiang Falls in Meghalaya, India (© Upamanyoo Das/Shutterstock)

Beavers Bend Resort Park near Broken Bow, Oklahoma (© Inge Johnsson/Alamy)

Beavers Bend Resort Park, Oklahoma, USA (© Inge Johnsson/Alamy)

El Tajo gorge and Puente Nuevo bridge, Ronda, Málaga, Spain (© Jude Newkirk/Amazing Aerial Agency)

First Cliff Walk on First near Grindelwald, Switzerland (© Hans-Georg Eiben/eStock Photo)

穿越格伦菲南高架桥的蒸汽火车，苏格兰因弗内斯郡 (© The Escape of Malee/Shutterstock)

Boardwalk Trail at Corkscrew Swamp Sanctuary in Florida (© Bill Gozansky/Alamy)

Greater racket-tailed drongo in Tripura, India (© Bernard Castelein/Minden Pictures)

Morning view of the Golden Temple in Amritsar, India (© Adrian Pope/Getty Images)

The Subway canyon, Zion National Park, Utah, USA (© Stan Moniz/Tandem Stills + Motion)

Forest near the village of Invergarry, Scotland (© Matt Anderson Photography/Getty Images)

Irohazaka road near Nikko, Japan (© LightRecords/Shutterstock)

Chocolate Hills in Bohol, Philippines (© Danita Delimont/Offset by Shutterstock)

Chocolate Hills, Bohol, Philippines (© Danita Delimont/Offset by Shutterstock)

A Bohemian waxwing in Canada (© Mircea Costina/Alamy)

Demoiselle cranes come to Khichan village in Rajasthan, India (© Pinkesh Bhati/Shutterstock)

Pen y Garreg dam, Elan Valley, Wales (© Joe Daniel Price/Moment Open/Getty Images)

Aerial view of snowy peaks of Vinicunca (aka Rainbow Mountain), Peru (© Jude Newkirk/Amazing Aerial Agency)

African bush elephants at Masai Mara National Reserve in Kenya (© Yva Momatiuk and John Eastcott/Minden Pictures)

African bush elephants, Masai Mara National Reserve, Kenya (© Yva Momatiuk and John Eastcott/Minden Pictures)