A policeman controls traffic at 42nd Street and 7th Avenue as New York City remains without electricity caused by a blackout that affected the entire city and most of the eastern part of the nation August 15, 2003 in New York, New York. More than 50 million people were affected by the outage, in Toronto, Detroit, Cleveland and New York City. (Photo by Jose Jimenez/Primera Hora/Getty Images)

In a July 14, 1967 file photo, left, National Guardsmen make their way along Market Street in Newark, N.J, after an evening of deadly rioting and looting in what came to be known as the Newark riots. In a June 16, 2017 photo, right, an ambulance drives on the same block 50 years later. (Photo by AP Photo/File, left; Julio Cortez, right)

At 10,582 square kilometres, the Bolivian salt flats – otherwise known as Salar de Uyuni – are the largest on the planet and contain between 50 and 70% of the world’s lithium reserves. After exploring Chile and Argentina, photographer Joel Santos decided to travel to Bolivia in January 2017 to check the salt flats off his bucket list. With an electrical storm rolling in, Joel and his two travelling companions were the only souls left on the vast flats and captured the eerie flats without a person in sight. (Photo by Joel Santos/Barcroft Images)

This photograph taken on June 4, 2022 shows fish vendor Somporn Thathom sitting at her stall as a passenger train passes through the Mae Klong railway market in Samut Songkhram province, around 80 kms (50 miles) southwest of Bangkok. Six times a day at the market, local customers and foreign tourists scramble into nooks and crannies while vendors calmly move their woven baskets of goods away from the tracks and close their umbrellas. (Photo by Manan Vatsyayana/AFP Photo)

This sumatran orangutan named Kulsum was captured playing with a piece of broken bottle making a pair of makeshift sunglasses to ward off the sun in Jakarta, Indonesia in November 2022. Sumatran orangutans are critically endangered of the three orangutan species and are only found in the north of the Indonesian Island of Sumatra. An orangutan has a long lifespan and can live up to 30 years in the wild with many living up to 50. (Photo by Syahrul Ramadan/Media Drum Images)

The National Geographic Photo Ark is a travelling exhibition of photographer Joel Sartore’s quest to create a photo archive of biodiversity around the world. So far, Sartore has captured studio portraits of more than 6,000 species – a number that he hopes to double. On 1 July, the ark will open at Melbourne zoo – the first time it has been exhibited in the southern hemisphere. More than 50 portraits will be on display, including many of Australian endangered animals being protected by programs at the zoo itself. These captions have been edited from text supplied by Melbourne zoo. Here: Barking owl. (Photo by Joel Sartore/National Geographic Photo Ark/The Guardian)

An elephant decorated with a cloth walk in the annual Nawam Perahera street parade in Colombo February 22, 2016. Over 50 elephants are participating in a street parade for Gangaramaya temple's annual Perahera festival, along with a nightly procession of traditional dancers, fire twirlers and traditional musicians. (Photo by Dinuka Liyanawatte/Reuters)

The Butchart Gardens is a group of floral display gardens in Brentwood Bay, British Columbia, Canada, located near Victoria on Vancouver Island. The gardens receive close to a million visitors each year. The gardens have been designated a National Historic Site of Canada due to their international renown.