Morley Read / Column of Leaf cutter ants (Atta sp) carrying leaves over the rainforest floor to their nest, Amazon rainforest, Orellana Province, Ecuador. (non-ex)

Morley Read / Column of Leaf cutter ants (Atta) carrying cut pieces of leaves along the forest floor towards therr nest, Orellana Province, Ecuador, 2018. (non-ex)

Yva Momatiuk & John Eastcott / Waterfall and basalt columns, Svartifoss Waterfall, Skaftafell National Park, Iceland

Tony Wu / Twinspot snapper (Lutjanus bohar) shoal rushing up to spawn, releasing a cloud of milky white sperm and eggs in the water column. Caroline Islands, Palau, November.

Hougaard Malan / Drakensberg Escarpment, the pinnacles known as the pyramid and the column can be seen protruding from the mist. KwaZulu-Natal, South Africa. November 2012.

Alex Mustard / Boulder star coral (Montastraea annularis) spawning at night with released bundles of eggs and sperm floating away in the water column, East End, Grand Cayman, Cayman Islands, British West Indies, Car...

Jeff Rotman / Whitetip reef sharks (Triaenodon obesus) pack silhouetted following scent trail in water column, Cocos Island, Costa Rica, Pacific Ocean

Georgette Douwma / Lyrtetail anthias (Pseudanthias squamipinnis) in water column with Peach anthias (Pseudanthias dispar) in background. Indonesia, October

Merryn Thomas / Kilt Rock and Loch Mealt waterfall under stormy skies in the morning, bassalt columns visible. Trotternish Peninsula, Isle of Skye, Scotland. September 2010.

Alex Hyde / Fingal's Cave, showing basalt columns, Isle of Staffa, Inner Hebrides, Scotland, UK, June 2010

Jeff Rotman / Whitetip Reef sharks (Triaenodon obesus) following scent trail in water column, Cocos Island, Costa Rica, Pacific Ocean.

Jeff Rotman / Whitetip Reef Sharks (Triaenodon obesus) following scent trail in water column, Cocos Island, Costa Rica, Pacific Ocean.