“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)

Impala pictured in the Kruger National Park on December 7, 2007 in Mpumalanga, South Africa. (Photo by Warren Little/Getty Images)

Sad woman standing near car with scratch on parking and talking by the phone. (Photo by Vera Petrunina/Getty Images)

Galapagos – Rocking the Cradle: Four major ocean currents converge along the Galapagos archipelago, creating the conditions for an extraordinary diversity of animal life, April 25, 2016. The islands are home to at least 7,000 flora and fauna species, of which 97 percent of the reptiles, 80 percent of the land birds, 50 percent of the insects and 30 percent of the plants are endemic. (Photo by Thomas P. Peschak for National Geographic/World Press Photo)

Long-eared owl chicks sit on a spruce branch in a park near St Petersburg, Russia on March 3, 2025. (Photo by Artem Priakhin/SOPA Images/Rex Features/Shutterstock)

A juvenile European starling hops from deer to deer eating insects. The white-tailed deer did not seem at all bothered by the bird - who can be seen cleaning it of ticks and bugs. The starling was one of a flock near the herd of deer in Sandy Hook, New Jersey, USA in the last decade of November 2025. (Photo by Erik Kessler/Solent News & Photo Agency)

Aerial view of people circling around bonfires to celebrate the Torch Festival on Axilixi Prairie on July 20, 2024 in Bijie, Guizhou Province of China. (Photo by Luo Dafu/VCG via Getty Images)

A four-day old African spurred tortoise, Geochelone sulcata, one of eight babies, was place on the head of its mother in their enclosure in Nyiregyhaza Animal Park in Nyiregyhaza, 226 km east of Budapest, Hungary, 27 September 2011. This was the first time that offspring of an African spurred tortoise were born in this zoo. The eight babies hatched after 115 days, they are 5.5 cms long and weigh 25 grams. Spurred tortoise is the largest species of land tortoises in Africa, the weight of an adult animal may reach 80 kgs. (Photo by Attila Balazs/EPA)