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

Ice sticking to the columnar basalt walls surrounding Abiqua Falls, Oregon, USA (© Joshua Meador/Tandem Stills + Motion)

Meerkat family huddling together (© stefbennett/Shutterstock)

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)

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

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

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

The Hollywood sign overlooking Los Angeles, California, USA (© Sean Pavone/Shutterstock)

Harvest mouse climbing on frosty seedhead, Hertfordshire (© Andy Sands/Minden Pictures)

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)

Pinzon Island tortoise hatchling at the Charles Darwin Research Station on Santa Cruz Island, Galápagos Islands, Ecuador (© Pete Oxford/Minden Pictures)

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

Humpback whale feeding on herring off the coast of Kvaløya, Troms, Northern Norway (© Espen Bergersen/Minden Pictures)

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

Ruff (Philomachus pugnax) male for London Fashion Week (© Loic Poidevin/Minden Pictures)

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)

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

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

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

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

Acadia National Park in Maine, USA (© emptyclouds/Getty Images)

Acadia National Park in Maine, USA (© emptyclouds/Getty Images)

Otter Creek in winter in Brandon, Vermont, USA (© Caleb Kenna/Offset)

Otter Creek in winter in Brandon, Vermont, USA (© Caleb Kenna/Offset)

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