A group of people are seen on a Victoria line train in London, England during the first night of the Night Tube service on August 19 2016. The Central line and Victoria line are the first to operate a Night service with further lines expected to be running by the end of the year. (Photo by SWNS.com)

The Thufa hill in Reykjavik, Friday, October 28, 2016. Parliamentary elections will be held in Iceland on October 29, 2016, more than 250,000 voters are called to elect the new parliament, 63 members of the Althing parliament. (Photo by Frank Augstein/AP Photo)

A ring-tailed lemur sunbakes at Melbourne Zoo in Melbourne, Victoria, Australia on December 21 2016. (Photo by Julian Smith/EPA)

Demonstrators protest against bullfighting in front of the City Hall a day before of the famous San Fermin festival, in Pamplona, northern Spain, Friday, July 5, 2019. The festival will begin on July 6 with the “txupinazo” opening ceremony, with people participating in bull runs, music and dance, through the old city. (Photo by Alvaro Barrientos/AP Photo)

A young woman smokes a cigarette straddled across a man's lap on Ladies' Day at Epsom, England on June 2, 2017. Ladies' Day is traditionally held on the first Friday of June, a multitude of ladies and gents head to Epsom Downs Racecourse to experience a day full of high octane racing, music, glamour and fashion. (Photo by Peter Dench/Getty Images Reportage)

With her husband, Brazil's new President Jair Bolsonaro in the background, Brazil's new first lady Michelle Bolsonaro gives a military salute from the Planalto Presidential palace, in Brasilia, Brazil, Tuesday, January 1, 2019. (Photo by Silvia Izquierdo/AP Photo)

The nearly four-week-old Tapir cub bathes on June 28, 2016 in Gondwanaland at the zoo in Leipzig, Saxony. (Photo by Jan Woitas/DPA)

British theoretical physicist Stephen Hawking, Cambridge University Professor and Fellow, circa 1985. Stephen Hawking, the brightest star in the firmament of science, whose insights shaped modern cosmology and inspired global audiences in the millions, has died aged 76. (Photo by Gemma Levine/Getty Images)