Police and the Russian National Guard (Rosgvardia) servicemen patrol Red Square in front of the Spasskaya tower of the Kremlin in Moscow on October 24, 2022, as part of security reinforcement measures. (Photo by Alexander Nemenov/AFP Photo)

Igor, a 40 year-old Ukranian soldier embraces his wife in front of his military basement in the center of Odessa on March 17, 2022. Odessa, which Ukraine fears could be the next target of Russia's offensive in the south, is the country's main port and is vital for its economy. But the city of one million people close to the Romanian and Moldovan borders also holds a special place in the Russian imagination. (Photo by Bulent Kilic/AFP Photo)

A veterinarian takes a sample from a cat at an animal shelter in Yeoju, southeast of Seoul, South Korea, 01 August 2023, after cats were found to have been infected with a highly pathogenic H5N1 avian influenza strain at shelters in Seoul on 25 and 29 July, marking the first infections of the virus in mammals since 2016. (Photo by Yonhap/EPA)

A protester reacts at an anti-riot police officer after being teargased as he takes part in a demonstration against a controversial tax bill in the central business district in Nairobi, Kenya, 20 June 2024. Police have fired tear gas to disperse protesters who gathered near the parliament to demonstrate against planned tax hikes that many fear will worsen the cost-of-living crisis. (Photo by Daniel Irungu/EPA)

A man reacts as he holds the equipment used by Palestinian cameraman Hussam al-Masri, who was a contractor for Reuters, at the site where he was killed along with other journalists and people in Israeli strikes on Nasser hospital, in Khan Younis in the southern Gaza Strip, in this still image taken from a video shot by Reuters contractor Hatem Khaled, who was wounded shortly afterwards in another strike while he was filming the site on August 25, 2025. (Photo by Hatem Khaled/Reuters)

Singer Katy Perry arrives at the Metropolitan Museum of Art Costume Institute Gala 2015 celebrating the opening of “China: Through the Looking Glass” in Manhattan, New York May 4, 2015. (Photo by Lucas Jackson/Reuters)

Hucul horses play in the wild meadows and forests near Odrzychowa in southeastern Poland on October 18, 2014. Huculs, a primitive breed of horse, escaped total extinction due to the efforts of scientists and Polish farmers. (Photo by Janek Skarzynski/AFP Photo)

Ngorongoro Crater (Tanzania). At 610m deep and 260 sq km, this is the largest unflooded caldera in the world. A blue-green vision from above it's a haven for engangered wildlife and Maasai livestock. The crater was formed three million years ago when a giant volcano, which could have been as high as Kilimanjaro, exploded and collapsed. The caldera formed the concentric fractures in the crust cracked down to a magma reservoir deep underground. (Photo by John Bryant/Getty Images)