A woman takes part in an initial military training for civilians at the sports and patriotic club “Yaropolk” in Krasnogorsk outside Moscow, Russia on December 3, 2022. (Photo by Yulia Morozova/Reuters)
Cars submerge in water as heavy rain floods the Southern part of the country in Najaf, Iraq on January 04, 2023. (Photo by Karar Essa/Anadolu Agency via Getty Images)
A man holds tasbih, or prayer beads, as he sits with a plate of food before breaking fast during the fasting month of Ramadan, at a roadside in Karachi, Pakistan on March 28, 2023. (Photo by Akhtar Soomro/Reuters)
A boy sits next to sacrificial goats resting during Eid al-Adha in New Delhi, India, 29 June 2023. Muslims around the world celebrate Eid al-Adha or feast of sacrifice, by slaughtering sheep, goats and cows to commemorate Prophet Abraham's willingness to sacrifice his son Ismail at God's command. (Photo by Harish Tyagi/EPA)
In animals, yawning can serve as a warning signal. For example, Charles Darwin, in his book The Expression of the Emotions in Man and Animals, mentioned that baboons yawn to threaten their enemies, possibly by displaying large canine teeth. Similarly, Siamese fighting fish yawn only when they see a conspecific (same species) or their own mirror-image, and their yawn often accompanies aggressive attack. Guinea pigs also yawn in a display of dominance or anger, displaying their impressive incisor teeth. This is often accompanied by teeth chattering, purring and scent marking.
A preparatory model of the Imperial State Crown of India worn in 1911 by King George V stands next to original ledgers dating from 1735 in Garrard's flagship store in Mayfair on April 6, 2011 in London, England. Garrard is the world's oldest jewellers having been founded by George Wickes in 1735 and soon after appointed as goldsmith to the Prince of Wales. For over 160 years Garrard held the title of Crown Jeweller, bestowed by Queen Victoria in 1843, Garrard have served six successive monarchs. They have produced several royal crowns as well as the engagement ring presented to Kate Middleton by Prince William and formerly Princess Diana's engagement ring. (Photo by Oli Scarff/Getty Images)
Kate Upton walks the runway at the Beach Bunny Swimwear show during Merecdes-Benz Fashion Week Swim 2012 at The Raleigh on July 15, 2011 in Miami Beach, Florida. (Photo by Frazer Harrison/Getty Images for Beach Bunny)
A sculpture is displayed at the Olympic Sculptures Exhibition at the Sculpture Park September 4, 2006 in Changchun of Jilin Province, China. (Photo by China Photos/Getty Images)