Icicles are seen on a handrail along the coast at Donggang business district in Dalian, Liaoning province, China on December 27, 2018. (Photo by Reuters/China Stringer Network)

A boy covers his head with fallen leaves as he enjoys a stroll with his family in a park in downtown Frankfurt, Germany, November 6, 2016. (Photo by Kai Pfaffenbach/Reuters)

Meropidae are seen on a rock in Van in Turkey on March 03, 2018. (Photo by Ali Ihsan Ozturk/Anadolu Agency/Getty Images)

A colourful morning sunrise on Christmas Eve at Victoria Tower on Castle Hill, West Yorkshire, England on December 24, 2017. The history of human activity on the Castle Hill goes back over 4000 years. The site was developed as an iron age hill fort, surrounded by defensive ditches and ramparts. In the Middle Ages there was a castle on the hill, of which the well remains. The present tower was built to commemorate Queen Victoria's Diamond Jubilee of 1897. (Photo by Charlotte Graham/ZUMA Wire/Rex Features/Shutterstock)

A man waits with his camel to take part in a camel decoration competition at the Nagaur Cattle Fair, where animals like camels, cows, horses, and bulls are brought to be sold or traded, in Nagaur, in the desert state of Rajasthan, India February 2, 2017. (Photo by Himanshu Sharma/Reuters)

Acid attack survivors wait in the back stage prior to participate in a fashion show titled “Beauty Redefined” organized by ActionAid Bangladesh in Dhaka, Bangladesh, March 7, 2017. Such horrific violence across South Asia is often prompted by insufficient dowries, rejection of advances or land disputes, disfiguring victims for life and ruining their prospects. (Photo by Mohammad Ponir Hossain/Reuters)

In this picture taken on Sunday, March 5, 2017, a Tehran's urban animal control worker catches a stray dog after being shot with his anesthetic dart on the outskirts of the capital Tehran, Iran. The shelter has been hired by the Tehran city government to take a new, more humane approach to deal with the burgeoning problem of stray dogs in the capital. It’s a sign of changing attitudes among officials in a country where Islamic authorities long saw dogs as “un-Islamic” and would at times confiscate them from people who kept them as pets. (Photo by Vahid Salemi/AP Photo)

Participants of the so called “Victorian Picnic” walk in fancy costumes during the Wave Gothic Festival (WGT) in Leipzig, Germany, Friday, June 2, 2017. Approximately 20,000 goths and other dark subculture fans such as cybergoths, metalheads, steampunks, neo- Victorians, dark romantics, dark electro, industrial, medieval and fetish fans are expected to attend the world' s largest gothic and “dark” culture festival until June 5, 2017. (Photo by Tobias Schwarz/AFP Photo)