An African giant pouched rat sniffs for traces of landmine explosives at APOPO's training facility in Morogoro on June 17, 2016. APOPO trains the rats to detect both tuberculosis and landmines at its facility. Every year landmines kill or maim thousands of people worldwide. The trained rats sniff for explosive and so are able to detect the presence of landmines far faster than conventional methods which involve metal detection. (Photo by Carl De Souza/AFP Photo)

Workers clean empty cooking oil containers at a roadside recycling workshop in Kolkata, India, July 13, 2016. (Photo by Rupak De Chowdhuri/Reuters)

In this Monday, June 5, 2017, file photo, an Indian woman walks as se searches for recyclable materials at a garbage dumping site on the outskirts of Gauhati, Assam state, India. (Photo by Anupam Nath/AP Photo)

Two horses appear to burst into laughter before a sweet embrace. The horses both turn their head to look at the camera and flash their teeth, treating the lucky photographer to a rare shot. Moments later the pair show their affectionate side by coming together and “hugging”. Photographer Nir Amos, 34, said he was “amazed” to capture the horses “laughing” in a field near Skógar, in the south east of Iceland on July 31, 2018. (Photo by Nir Amos/Solent News & Photo Agency)

Two brown bears bathe in their enclosure at the Wildpark Poing in Poing, Germany, Wednesday, August 8, 2018. (Photo by Lino Mirgeler/Deutsche Presse-Agentur via AP Photo)

Bollywood actress and former p*rn star Sunny Leone stands with her wax likeness during its unveiling at the Madame Tussauds museum in New Delhi, India, Tuesday, September 18, 2018. The statue unveiled Tuesday represents the 37-year-old celebrity's acceptance by mainstream Indian society even as conservative Indian politicians condemn her p*rn-star past. (Photo by Anupam Nath/AP Photo)

A woman poses after she got an image of a lion tattooed on her back as part of awareness campaign to save Asiatic lions and in preparations for the upcoming Navratri festival in Ahmedabad, India, October 5, 2018. (Photo by Amit Dave/Reuters)