An image of three continuously bouncing oil droplets was the winner of this year's competition. <br /><br />
Quantum Droplets by Aleks Labuda —
An image of three continuously bouncing oil droplets was the winner of this year's competition.

Aleks Labuda
A clown fish floats among the tentacles of a bleaching sea anemone in Thuwal, Saudia Arabia.
Fade to White by Morgan Bennett-Smith —
A clown fish floats among the tentacles of a bleaching sea anemone in Thuwal, Saudia Arabia.
Morgan Bennett-Smith
Most tornadoes start as funnel clouds, such as this large one in the Yukon, Canada.
Twister in the Yukon by Lauren Marchant —
Most tornadoes start as funnel clouds, such as this large one in the Yukon, Canada.
Lauren Marchant
Blue-spotted mudskippers skirmish in the Mai Po wetlands, Hong Kong.
Mudskipper Turf War by Daniel Field —
Blue-spotted mudskippers skirmish in the Mai Po wetlands, Hong Kong.
Daniel Field
A lunar halo above the forest of Mogilev, Belarus demonstrates a phenomenon often seen in frosty weather when there is high humidity.
Halo by Mikhail Kapychka —
A lunar halo above the forest of Mogilev, Belarus demonstrates a phenomenon often seen in frosty weather when there is high humidity.
Mikhail Kapychka
A white coating is spread by the rotting stems of water lilies in the Ľuboreč water reservoir, Slovakia.
Abstract water gallery by Daniela Rapavá —
A white coating is spread by the rotting stems of water lilies in the Ľuboreč water reservoir, Slovakia.
Daniela Rapava
Ferrofluids shapeshift under the magnetic field created by two rare-earth disc magnets.
Magnetostatic Spawn by Aleks Labuda —
Ferrofluids shapeshift under the magnetic field created by two rare-earth disc magnets.
Aleks Labuda
A young blue trevally feeds on a purple jellyfish, and guards it against others who may wish to do the same. <br />
Jelly-fish association by Eduardo Sampaio —
A young blue trevally feeds on a purple jellyfish, and guards it against others who may wish to do the same.
Eduardo Sampaio
Mammatus clouds -- formed when downward currents collide with rising warm air -- seen after a sunset in Wyoming, USA.
Mammatus on Fire by Cándido R. Vicente Calle —
Mammatus clouds -- formed when downward currents collide with rising warm air -- seen after a sunset in Wyoming, USA.
Cándido R. Vicente Calle
In August 2018, Anak Krakatau in East Asia, is seen here at the start of its eruptive phase. Later, its southwestern flank collapsed and caused a tsunami, which killed hundreds of people in December 2018.
The Child of Krakatoa Awakes by James DP Moore —
In August 2018, Anak Krakatau in East Asia, is seen here at the start of its eruptive phase. Later, its southwestern flank collapsed and caused a tsunami, which killed hundreds of people in December 2018.
James Moore