A smiling gecko bursts through a gap in the bark to surprise photographer in West Java, Indonesia in the last decade of March 2025. (Photo by Dzul Duzulfikri/Animal News Agency)

A Ukrainian serviceman smiles on May 21, 2024 during a moment of calm in the southeastern town of Orikhiv, Zaporizhzhia, which has been heavily damaged by Russian military strikes. (Photo by Reuters/Stringer)

American model and television personality Chrissy Teigen lights up the Empire State Building with her style and smile in the last decade of May 2024. (Photo by chrissy teigen/Instagram)

“I think as mothers we are all just trying our best”. – Gisele Bundchen. (Photo by Mads Nissen/AFP Photo)

Best portfolio winner. Roseate Spoonbill, Platalea ajaja, by Petr Bambousek, Czech Republic. (Photo by Petr Bambousek/2018 Bird Photographer of the Year)

His majesty King Jigme Khesar Namgyel Wangchuck (L), 31, smiles at his bride during the purification marriage ceremony to Queen Jetsun Pema, 21, in the historical Punakha Dzong on October 13, 2011 in Punakha, Bhutan. The Dzong is the same venue that hosted the King's historic coronation ceremony in 2008. The Oxford-educated king is popular in the country and the ceremony will be followed by celebration in the capital and countryside. (Photo by Paula Bronstein/Getty Images)

First year cadets of the Military University of Communication smile before an oath-taking ceremony in St.Petersburg September 6, 2014. Some 700 first year cadets of the academy attended the ceremony before starting their studies. (Photo by Alexander Demianchuk/Reuters)

A woman smiles as she gets a new tattoo during Rio Tattoo Week in Rio de Janeiro, Brazil, Friday, January 16, 2015. Tattoo artists from Brazil and around the world gathered for the annual three day convention. (Photo by Silvia Izquierdo/AP Photo)