Three workers demonstrating the different types of gas masks used in mine rescue work. (Photo by Fox Photos/Getty Images). December 1925

Astronaut Edwin E. Aldrin Jr. walks near the Lunar Module during the Apollo 11 extravehicular activity July 20, 1969 on the Moon. (Photo by NASA/Newsmakers)

A woman (C) shops for an offering at the witch doctor's street in La Paz, July 31, 2015. According to Andean culture, the all the month of August is a time to give offerings to “Pachamama” to give thanks for their farms and health. The Aymaras use coca leaves, candies, animal fat, llama fetuses, some dried fruits, powdered minerals and alcohol during these rituals. (Photo by David Mercado/Reuters)

Undated handout photo issued by Guinness World Records of Fabio Reggiani from Italy who has made it into the Guinness Book of World Records for constructing the worlds largest rideable motorcycle measuring 5.10 meters (16ft 8.78 in) from the ground to the top of the handlebars. Six times larger than a normal motorcycle, it's 10.03 m long, 2.5 m wide, and weighs approximately 5,000 kg (5 tonnes). (Photo by Guinness World Records/PA Wire)

Nestled among the cocoa plantations of western Ivory Coast is a gold mine that does not feature on any official maps. It is not run by an industrial mining company, nor does it pay taxes to the central government. The unlicensed mine is a key part of a lucrative business empire headed by the deputy commander of the West African nation's elite Republican Guard, United Nations investigators allege. Here: A gold prospector sits and eats close to a soldier at a gold mine near the village of Gamina, in western Ivory Coast, March 18, 2015. (Photo by Luc Gnago/Reuters)

“This is a shot I have envisioned in my head for a while, and only possible to shoot today with the invention of the GoPro. Shot at a beach break near my home. The board broke on this wave, but the vision made it worthwhile. Shot with the GoPro Hero 3+ and a Gripstick Pro Mount”. (Photo and caption by Mike Coots)

A competitor wearing a kilt and standing on a barrel throws a bowling ball between her legs during the “Brigaball” contest at the annual Bundanoon Highland Gathering, showcasing traditional Scottish events, held in the town of Bundanoon, located southwest of Sydney, April 9, 2016. (Photo by David Gray/Reuters)

Australian cosplay enthusiast Sunni Daniele dressed up as his favourite character from either animation, comic or video game poses for a photograph during Oz Comic Con in Sydney, Australia, 27 September 2015. Cosplay is a combination of the words 'costume' and 'play' where fans dress up as their favourite Japanese comic characters. (Photo by Dan Himbrechts/EPA)