Fireworks are exciting, but also hard to control. The Chinese artist Cai Guoqiang，though, has developed a way to harness the visual and physical power of fireworks to make art He recently used them to create a burning sculpture that stretched high into the sky. Guoqiang fittingly named the work Sky Ladder.

Guoqiang built Sky Ladder by making a frame out of metal. He coated the frame with gunpowder，the main chemical material in fireworks.

The artist tried one end of the frame to the ground and attached a large weather balloon to the other end. The balloon was filled with helium 一 a gas that is lighter than air. When released，the balloon floated upward, pulling the top of the ladder 500 meters into the sky. That’s higher than the top of the Empire State Building.

Guoqiang set fire to the bottom of the ladder，and the crackling（啪啪作响） flames raced skyward up the frame. The sculpture burned for two-and-a-half minutes before its flames began to die out from the bottom up.

Dealing with explosive (炸药）is challenging, and conditions had to be perfect for Guoqiang to achieve his desired effect. He first attempted Sky Ladder in 1994，but bad weather prevented him from successfully completing the work. Guoqiang put Sky Ladder aside so that he could work on other projects, perhaps most famously the fireworks display that opened the 2008 Beijing Olympic Games.

Finally，after two more failed attempts，Guoqiang successfully sent his flaming ladder skyward last year. He presented Sky Ladder in his hometown, a quiet fishing village near Huiyu Island, Quanzhou. He offered the work as a gift to his 100-year-old grandmother，other family members，his friends and his town.

“Behind Sky Ladder lies a clear childhood dream of mine，"Guoqiang explains. “Despite all life’s twists and turns, I have always been determined to realize it. The ladder rose toward the morning sun, carrying hope. For me, this not only means a return, but also the start of a new journey."

China's Bao Yongqing has been named the overall winner of the Wildlife Photographer of the Year competition for 2019, claiming one of the world's top photography awards.

The competition is developed and produced by the Natural History Museum in London. This year's competition, the 55th, drew more than 48,000 entries from 100 countries. The winning entry by Bao, a native of Qinghai province, is titled The Moment. It captures a remarkable standoff between a Tibetan fox and a marmot, and was taken on the Qinghai-Tibet Plateau. "Photographically, it is quite simply the perfect moment," said Roz Kidman Cox, the chairwoman of the judging panel. "The expressive intensity of the postures holds you transfixed, and the thread of energy between the raised paws seems to hold the protagonists in perfect balance, Cox said. "To have captured such a powerful interaction between a Tibetan fox and a marmot — two species key to the ecology of this high-grassland region — is extraordinary. Museum Director Michael Dixon said the picture captured "nature's ultimate challenge — the battle for survival". Bao, in a group interview on Wednesday, said of the photo: "It is very difficult and rare to capture this kind of moment, so I knew it was something very special. It took about two or three hours to get this photo. I was watching them for a long time. I have paid attention to this competition for a long time, and my first purpose was to show my image to the world, and secondly to protect the environment and my homeland," he said. " In my hometown, everyone looks after the animals, so when I go home with this award, it will be an encouragement to our people to be more protective of animals and the environment." In addition, the photographer said : "This competition is one of the most important among photographers in China, so I wanted to draw people's attention to animal protection. I hope it will introduce a passion for animals to more people."

The exhibition at the Natural History Museum in Kensington will open on Friday and run through the end of May next year, when it will go on a national and international tour. Entries for next year's competition will be accepted beginning on Oct. 21.

At the 4th Street Photo Gallery on the comer of the Bowery, many photos are strung together like clothes on a laundry line. There are portraits of Muhammad Ali and Jean-Michel Basquiat, plus a series of cityscapes detailedly captured over 60 years by Alex Harsley, a neglected but talented New York photographer.

The city has been Mr Harsley’s home since 1948, when, aged ten, he moved there from South Carolina. He took his first photograph ten years later, and became the first black photographer to work for the city’s district attorney’s office. His vivid pictures freeze moments in New York’s evolution from the 1950s to the present. “It could start with the smell of something burning.” he says of his method. “And then you see a family sitting on the steps of a funeral home sadly looking at the firemen going through their routine.”

Some of the scenes in the collection were captured from the window of his old apartment in Harlem; they include images of black activists, streets submerged in snow and shots of the Crown Heights riots of 1991. A.D. Coleman, a photography critic, says Mr. Harsley has been able to capture the lives of minority groups by making himself “invisible”. His aim has been to assemble these fragments (片段) into an extended history of the city.

Mr. Harsley’s gallery is a time capsule. For decades, it is also a hub for the city’s artistic underworld. In the 1970s New York’s photography scene was flourishing, but exclusive. As Mr. Harsley puts it, “a number of great artists were swept aside” because they lacked connections. Helping talent became part of his mission. In 1971 he established The Minority Photographers, an organization that helps up-and-coming artists exhibit their work. He opened his gallery two years later; many photographers have had their first shows there.