Participants wearing colorful costumes take part in the Flowers Parade of the 151th annual Carnival of Nice, in Nice, France, 20 March 2024. The annual Carnival of Nice run from 17 February to 03 March 2024, and the main theme will be “King of Pop Culture”. (Photo by Sebastien Nogier/EPA)

Festivalgoers on June 29, 2025 enjoy the final day of Glastonbury Festival, where Rod Stewart wowed the Pyramid Stage crowd in the legends slot, with Olivia Rodrigo down to headline the Pyramid Stage. (Photo by South West News Service)

Drag king Riss Obolensky performs as drag king Norman Creebs during the Opening Cabaret at The London Clown Festival in London, Britain, on July 8, 2024. (Photo by Hollie Adams/Reuters)

Actress Bella Thorne attends the Teen Choice Awards 2015 at the USC Galen Center on August 16, 2015 in Los Angeles, California. (Photo by Steve Granitz/WireImage)

Students from CAS Ballet Theatre School stretch on the sidewalk Saturday, February 20, 2016, in Ann Arbor, Mich. (Photo by Junfu Han/The Ann Arbor News via AP Photo)

Residents with their empty containers crowd around a municipal tanker to fetch water in New Delhi, India, February 22, 2016. The Indian army has taken control of a canal that supplies three-fifths of Delhi's water, the state's chief minister said on Monday, raising hope that a water crisis in the metropolis of more than 20 million people can be averted. (Photo by Anindito Mukherjee/Reuters)

LONDON - JUNE 04: A piece entitled “Entrance into wood” by Elke Krystufek goes on show at The Royal Academy Summer Exhibition on June 4, 2008 in London. In it's 240th year, the exhibition displays a wide range of recent work by both established and emerging artists. 10,000 artists submitted work for selection this year. (Photo by Peter Macdiarmid/Getty Images)

“Contrails (short for “condensation trails”) or vapour trails are artificial clouds that are the visible trails of condensed water vapour made by the exhaust of aircraft engines. As the hot exhaust gases cool in the surrounding air they may precipitate a cloud of microscopic water droplets or, if the air is cold enough, tiny ice crystals”. – Wikipedia

Photo: An airplane leaves a vapor trail as it flies in front of he moon on January 17, 2007 above Hanover, Germany. (Photo by Alexander Hassenstein/Getty Images)