Two hippopotamus are fed with pumpkins at the Hanoi Zoo, in Hanoi, Vietnam, 25 October 2018. The zoo has been the home for more than 800 animals of over 90 different species, including three hippopotamus, since it was built in 1976. (Photo by Luong Thai Linh/EPA/EFE)

A girl sits on a pile of rubbish at landfill site on the outskirts of Sanaa, Yemen November 16, 2016. (Photo by Mohamed al-Sayaghi/Reuters)

In this March 19, 2016 photo, Kay Pike transforms herself using body paint and latex into Superman while live streaming at her home in Calgary, Alberta. Pike refers to all her creations as her “little paint children”. She said it would be boring and lonely to do the painting without an audience. (Photo by Jeff McIntosh/The Canadian Press via AP Photo)

A man carries a television away from a fire in a slum area next to railway tracks in Kampung Bandan, North Jakarta, Indonesia January 26, 2016. According to local media, the fire destroyed approximately 100 wooden dwellings, built along a busy railway line. No casualties were reported. (Photo by Reuters/Beawiharta)

A labourer pulls a cart loaded with sacks of spices at a wholesale spice and chemical market in the old quarters of Delhi, India, December 19, 2016. Picture taken December 19, 2016. (Photo by Adnan Abidi/Reuters)

Participants perform during a Latin dance competition in Tel Aviv, Israel July 18, 2015. Some 66 dancers took part in the contest on Saturday, selecting a winning couple to represent Israel in the finals of The World Latin Dance Cup, which will be held at the end of the year in Miami. (Photo by Amir Cohen/Reuters)

Newborn sea lion “Kaya” crawls at the enclosure at the zoo in Wuppertal, Germany July 23, 2015. Kaya was born on July 4, 2015 in the zoo, officials said. (Photo by Ina Fassbender/Reuters)

Members of the general public enjoy the “BEACH” at the National Building Museum August 25, 2015 in Washington, DC. The “BEACH” is an interactive architectural installation, with an “ocean” of nearly one million recyclable translucent plastic balls, that brings the experience of going to the beach indoor. (Photo by Alex Wong/Getty Images)