'Mapping Courage: Honoring W.E.B. Du Bois & Engine #11,' a mural by Willis Humphrey, Philadelphia, PA (© Christian Carollo/Shutterstock)(Bing United States)

Meerkat family huddling together (© stefbennett/Shutterstock)(Bing United States)

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

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

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

A snowdrop in bloom (© Péter Hegedűs/Getty Images)(Bing United States)

View of the Old City in Quebec City, Canada (© RENAULT Philippe/age fotostock)(Bing United States)

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

The Hollywood Sign overlooking Los Angeles, California (© Sean Pavone/Shutterstock)(Bing United States)

Aerial view of Superkilen, a park in Copenhagen, Denmark (© Oliver Förstner/Alamy)(Bing United States)

Dr. Sylvia Earle explores Australia's Great Barrier Reef in a scene from 'Mission Blue' (© Bryce Groark/AP Photo/Netflix)(Bing United States)

Pinzon Island tortoise hatchling emerging from its egg at the Charles Darwin Research Station on Santa Cruz Island, Galápagos Islands, Ecuador (© Pete Oxford/Minden Pictures)(Bing United States)

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

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

Humpback whale feeding on herring off the coast of Kvaløya, an island in Northern Norway (© Espen Bergersen/Minden Pictures)(Bing United States)

The 2019 Lemon Festival in Menton, France (© Mandoga Media/Alamy)(Bing United States)

Mount Rushmore National Memorial in South Dakota (© Tony Austin/Alamy)(Bing United States)

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

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

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

Giant puppets for Carnival in Olinda, Brazil (© Pulsar Imagens/Alamy)(Bing United States)

The interior of the Great Temple of Ramesses II, Abu Simbel, Egypt (© Nick Brundle Photography/Getty Images)(Bing United States)

People ice fishing on Gull Lake in Brainerd, Minnesota (© Robert Benson/Cavan)(Bing United States)

Pilgrims throwing wind horses into the air above Ganden Monastery for the New Year in Tibet, China (© Ian Cumming/plainpicture)(Bing United States)

The Roots of Music Cultural Sculpture Garden in Louis Armstrong Park, New Orleans, LA (© jejim120/Alamy)(Bing United States)

Acadia National Park in Maine (© emptyclouds/Getty Images)(Bing United States)

A polar bear sow and her cubs in Alaska's Arctic National Wildlife Refuge (© Steven Kazlowski/Minden Pictures)(Bing United States)

Otter Creek in winter, Brandon, Vermont (© Caleb Kenna/Offset)(Bing United States)

A Wallace's flying frog glides to the forest floor (© Stephen Dalton/Minden Pictures)(Bing United States)