This huge male orangutan is having a right old laugh as he squints his eyes and shows his huge teeth. The orangutan, called Bimbo, was relaxing on a platform around 5m high in his enclosure when he broke out into a laugh. But his happy smile soon disappeared when another orangutan came over to see what was going on. Bimbo – the only male in the group of five apes at Leipzig Zoo, in Germany - appears to be laughing in much the same way as a human would. (Photo by Martina Radtke/Solent News)

Alex Plunkett, left, and Sean Hart, both of Arlington, Va., join hundreds participating in the annual International Pillow Fight Day on April 5. Massive pillow fights broke out on the Mall in Washington and in cities around the world. (Photo by Marvin Joseph/The Washington Post)

Visitors dressed in superhero costumes attend the Paris Comics Expo at the Parc Floral in Paris, France, April 15, 2016. (Photo by Charles Platiau/Reuters)

A cosplayer uses moving stairs during the first public day of the world's largest computer games fair Gamescom in Cologne, Germany August 23, 2017. (Photo by Wolfgang Rattay/Reuters)

People look at the paintings depicting Russian president Vladimir Putin dressed as Father Frost, Russian equivalent of Santa Claus, at the “SUPERPUTIN” exhibition at UMAM museum in Moscow, Russia on December 6, 2017. (Photo by Maxim Shemetov/Reuters)

This picture taken on January 17, 2019 shows jeepneys during rush hour in Manila, Philippines. Hand-painting custom decor on jeepneys adorned with images of everything from Batman to babies, as well as disco lights and chrome wheels, have for decades provided cheap transport for millions. But pollution and safety concerns have led to a modernisation programme, with jeepneys 15 years or older to be taken off the streets by 2020. (Photo by Noel Celis/AFP Photo)

A rooster bred for its all black appearance walks through the yard of a small backyard farm on February 3, 2017 on the outskirts of Jakarta, Indonesia. The roosters, called Ayam Cemani, are completely black including their bones and meat and are often sold for use in rituals. (Photo by Ed Wray/Getty Images)