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)

A couple walks across the Francis Scott Key Bridge as the setting sun lights up the clouds in Washington, Friday, October 30, 2020. (Photo by J. David Ake/AP Photo)

British television presenters Trinny Woodall (centre right) and Susannah Constantine (centre) lead almost 900 women in throwing their old bras into the air in Rothwell town square in Rothwell, Northamptonshire on May 7, 2007. (Photo by Clara Molden – PA Images/PA Images via Getty Images)

Aide Choque, wearing a mask amid the COVID-19 pandemic, jumps with her skateboard during a youth talent show in La Paz, Bolivia, Wednesday, September 30, 2020. Young women called “Skates Imillas”, using the Aymara word for girl Imilla, use traditional Indigenous clothing as a statement of pride of their Indigenous culture while playing riding their skateboards. (Photo by Juan Karita/AP Photo)

A man falls from a horse at a rodeo exhibition during Tradition Day, aimed to preserve gaucho traditions, in San Antonio de Areco, Argentina, Sunday, November 13, 2022. Tradition Day is celebrated to honor the birth of Argentine writer Jose Hernandez, author of the country's national poem “The Gaucho Martin Fierro”. (Photo by Natacha Pisarenko/AP Photo)

A Ukrainian service member smokes near a frontline, amid Russia's attack on Ukraine, in Donetsk region, Ukraine on February 8, 2023. (Photo by Yevhenii Zavhorodnii/Reuters)

A small Leatherback sea turtle heads towards the sea during the sunset at Lhoknga beach in Aceh province on February 25, 2023. (Photo by Chaideer Mahyuddin/AFP Photo)

Camels graze in front of a spacecraft tracking station ahead of the Soyuz MS-10 upcoming launch at the Baikonur Cosmodrome, Kazakhstan, October 9, 2018. (Photo by Shamil Zhumatov/Reuters)