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)

Military chaplain Yurii looks on in a trench after an Orthodox Easter service for Ukrainian servicemen at their position, as Russia's attack on Ukraine continues, in Kharkiv region, Ukraine on April 15, 2023. (Photo by Sofiia Gatilova/Reuters)

Ukrainian servicemen fire toward Russian troops with a tank at a position in Donetsk region, as Russia's attack on Ukraine continues, Ukraine on August 12, 2022. (Photo by Reuters/Stringer)

A Ukrainian gunner sits in his 2S1 Gvozdika (122-mm self-propelled howitzer) on the front line in Southern Ukraine on October 8, 2022, amid the Russian invasion of Ukraine. (Photo by Dimitar Dilkoff/AFP Photo)

People take part in a military exercise for civilians conducted by veterans of the Ukrainian National Guard Azov battalion, amid threat of Russian invasion, in Kyiv, Ukraine on January 30, 2022. (Photo by Gleb Garanich/Reuters)

An Indian Royal Bengal tiger looks on at an enclosure on World Tiger Day at Alipore Zoo, Kolkata, India, 29 July 2019. Kolkata zoo authority added a new Tiger to the zoo for the visitors to mark the Tiger Day. Students of Kolkata are also taking part in an awareness campaign aiming to draw attention to the threats that tigers face due to habitat loss and poaching. (Photo by Piyal Adhikary/EPA/EFE)

A ten days old South American sea lion pup sits next to its mother Lunita at the “Tiergarten Schoenbrunn” Zoo in Vienna, Austria, July 28, 2015. The pup was born in the zoo and weighs about 14 kilograms (30 pounds). (Photo by Leonhard Foeger/Reuters)

A chimpanzee bottle-feeds a lamb at Southam Zoo Farm in Warwickshire. The owners of the zoo, Mr and Mrs Clews, bring up many of the animals as their pets; the animals, are, as a result, of a friendly disposition. (Photo by Fox Photos/Getty Images). 23rd August 1968