Roof-topping enthusiast Daniel Lau takes a selfie with high-rise buildings down below as he stands on the top of a skyscraper in Hong Kong, China on August 15, 2017. A craze that began in Russia has now taken hold in Hong Kong, one of the world's most vertical cities. Mr Lau said he had been inspired by Russian climbers and that he was unafraid of the vertiginous heights he scales. (Photo by ImagineChina/Rex Features/Shutterstock)

Looking for love by Tony Wu, USA. Highly commended, Animal Portraits. “Accentuating his mature appearance with pastel colours, protruding lips and an outstanding pink forehead, this Asian sheepshead wrasse sets out to impress females and see off rivals, which he will head-butt and bite, near Japan’s remote Sado Island. Individuals start out as females, and when they reach a certain age and size – up to a metre (more than 3 feet) long – can transform into males. Long-lived and slow-growing, the species is intrinsically vulnerable to overfishing”. (Photo by Tony Wu/2018 Wildlife Photographer of the Year)

In this photo taken Wednesday, December 5, 2018, a woman who scavenges recyclable materials from garbage for a living is seen through a cloud of smoke from burning trash, surrounded by Marabou storks who feed on the garbage, at the dump in the Dandora slum of Nairobi, Kenya. As the world meets again to tackle the growing threat of climate change, how the continent tackles the growing solid waste produced by its more than 1.2 billion residents, many of them eager consumers in growing economies, is a major question in the fight against climate change. (Photo by Ben Curtis/AP Photo)

Aerialist Erin Blaire, 33, performs a hair hanging trick for a photographer while hanging from a metal bar on a subway platform on March 14, 2023 in New York City. Erin Blaire, originally from Vermont, has lived in New York City for eight years and has been performing her aerial hair routine for the last three. The origin of hair hanging is believed to have originated in China, according to reports, and is a closely guarded circus trick passed from mentor to mentee. Although it is possible to find the technique and secrets online it is most-likely not how professional performers learned the skillset, and not how Blaire did either. (Photo by Alexi Rosenfeld/Getty Images)

A member of the contemporary circus company Cirk La Putyka perform on the mobile trampoline as he amuses local residents in Prague, Czech Republic, 09 April 2020. The aim of the Cirk La Putyka events in the streets of Czech capital is to get live art back to people during the lockdown. According to them, when people can't go to the artists, to the theater, the actors go to the people. The Czech government has imposed a lockdown in an attempt to slow down the spread of the pandemic COVID-19 disease caused by the SARS-CoV-2 coronavirus. (Photo by Martin Divisek/EPA/EFE)

Robot inventor Wu Yulu sits on a rickshaw driven by a robot which he invented in his village in rural Beijing's Tongzhou district, China, 17 November 2016. The 54-year-old Chinese farmer living in rural Beijing's Tongzhou district invented 63 robots in the past 30 years. Wu, who only received primary school education, plans to give up the agricultural work for his robot products. He regularly participates in exhibitions, transfers patent rights and teaches at the university to earn money. (Photo by Wu Hong/EPA)

“Freedom”. After the 30 years banning import large motorcycle, in 2007, the Taiwan government reopened the import licensing of the motorcycle displacement over 550 cubic centimeter. Those large bikes, which were never seen before, were strange thought and treated unequally frequently. However, those adversity will not stop those enthusiastic bike riders from chasing the road of freedom. Photo location: Taiwan. (Photo and caption by 火花 羅/National Geographic Photo Contest)

Palestinian members of Gaza's Bar Woolf sports team perform with fire above the ruins of a building destroyed in recent Israeli air strikes, in Beit Lahia, on May 26, 2021. A ceasefire was reached late last week after 11 days of deadly violence between Israel and the Hamas movement which runs Gaza, stopping Israel's devastating bombardment on the overcrowded Palestinian coastal enclave which, according to the Gaza health ministry, killed 248 Palestinians, including 66 children, and wounded more than 1,900 people. Meanwhile, rockets from Gaza claimed 12 lives in Israel, including one child and an Israeli soldier. (Photo by Mahmud Hams/AFP Photo)