A photographer tested the concentration of several pairs of dogs as he captured their reactions to treat time in a series of shots. Christian Vieler, 47, of Waltrop, Germany, has been a professional dog photographer since 2016. He came up with the idea of snapping two dogs catching treats simultaneously. Here: Basset Hounds. (Photo by Vieler Photography/Caters News Agency)

“Sniff out the Appenzell Cheese”. Alexander Hunter, 30, of Greenwich, Conn., took this photo in Appenzell, Switzerland, in September 2014. (Photo by Alexander Hunter)

Rows of blossoming peach trees line the fields of Aitona, in the province of Lleida, north eastern Spain, on March 22, 2025. Every year in March the thousands of hectares of blossoming peach trees create a sort of nature tourism with hundreds of people visiting the area to take in the colorful blossoms. (Photo by Josep Lago/AFP Photo)

Typhoon Bopha moves toward the Philippines, observed from the ISS, on December 2, 2012. (Photo by AP Photo/NASA via The Atlantic)

“Say cheese”. Cheetahs jumped on the vehicle of tourists in Masai Mara national park, Kenya. (Photo and caption by Yanai Bonneh/National Geographic Traveler Photo Contest)

ATTENTION! All pictures are presented in high resolution. To see Hi-Res images – just TWICE click on any picture. In other words, click small picture – opens the BIG picture. Click BIG picture – opens VERY BIG picture.

Men pull with a rope the body of an Islamic State fighter before burying him near Karamah, south of Mosul, Iraq November 11, 2016. (Photo by Goran Tomasevic/Reuters)

People dressed as Adam and Barbara Maitland from “Beetlejuice” ride the subway after leaving New York Comic Con 2022 on October 08, 2022 in New York City. The four-day event, which began Thursday morning at the Jacob K. Javits Convention Center in Manhattan, is expected to attract over 200,000 comic, fantasy and pop culture fans from across the country and world. (Photo by Alexi Rosenfeld/Getty Images)

Members of contemporary circus group perform inside the subway train, amid the energy crisis in Prague, Czech Republic on March 2, 2023. (Photo by David W. Cerny/Reuters)