Benjamin Olson / Cave at night during polar vortex, Lake Superior, Tettegouche State Park, Minnesota, multiple exposures

Paul Williams / View from plane of eroded salt dome, Kavir Desert, Iran, December.

Ann & Steve Toon / Dust devil in Amboseli National Park in dry season, Kenya, October 2012

Doug Perrine / Reef manta rays (Manta alfredi formerly Manta birostris) vortex / cyclone feeding on plankton, Hanifaru Bay, Hanifaru Lagoon, Baa Atoll, Maldives, Indian Ocean, October

Philip Dalton / Waterspout over Lake Victoria, Uganda

Philip Dalton / Waterspout over Lake Victoria, Uganda

Graham Eaton / An updraft (vortex) of spiralling air and moisture caused by air being displaced by falling water. Pistyll Rhaeadr waterfall, located a few miles from the village of Llanrhaeadr-ym-Mochnant in Powys,...

Philip Dalton / Waterspout over Lake Victoria, Uganda

Benjamin Olson / Frozen lake during polar vortex, Silber Bay, Lake Superior, Minnesota

Henley Spiers / Whale shark (Rhincodon typus) creating a bubble vortex as it sucks in water and plankton while feeding, Baja California Sur, Mexico, Pacific Ocean.

Alex Mustard / A school of Blackfin barracuda (Sphyraena qenie) forming the number 6 as they circle in deep water adjacent to a coral reef, Yolanda Reef, Ras Mohammed Marine Park, Sinai, Egypt. Red Sea. July. Candid...

Sven Zacek / A vortex of foam and autumn leaves on Ohne river in Valgamaa county, Southern Estonia.