For the Torajan people of Indonesia, death is part of a spiritual journey: families keep the mummified remains of their deceased relatives in their homes for years – and traditionally invite them to join for lunch on a daily basis – before they are eventually buried. Here: Todeng died in 2009. A young relative of his, Sam, lights him a cigarette and changes his glasses. (Photo by Claudio Sieber Photography/The Guardian)

Mortsafes were contraptions designed to protect graves from disturbance. Resurrectionists had supplied the schools of anatomy in Scotland since the early 18th century. This was due to the necessity for medical students to learn anatomy by attending dissections of human subjects, which was frustrated by the very limited allowance of dead bodies – for example the corpses of executed criminals – granted by the government, which controlled the supply.

Demonstrators wear skull masks during an anti government protest, as Chile's President Michelle Bachelet delivers a speech inside the National Congress, in Valparaiso city, Chile May 21, 2016. (Photo by Ivan Alvarado/Reuters)

A voodoo believer, dressed as "Gede", a spirit of voodoo, sits on the cross of Baron Samdi during celebrations at the cemetery of Port-au-Prince, Haiti, November 1, 2016. Voodoo believers and devotees offer candles, alcohol and food. The Day of the Dead is celebrated on the first two days of November during All Saints and All Souls Day. (Photo by Andres Martinez Casares/Reuters)

Actors wrapped in blankets react at the set of the post-apocalyptic movie “Zombie Era” at an abandoned factory complex in Langfang, Hebei province, China December 16, 2016. (Photo by Damir Sagolj/Reuters)

Two women jump into a frozen pond as they compete in the Polar Plunge at Frozen Dead Guy Days in Nederland, Colorado March 14, 2015. The winter festival in the small mountain town commemorates the 1994 discovery of the corpse of Bredo Morstol, which is now housed in a shed on dry ice above the town. (Photo by Rick Wilking/Reuters)

The carriages have decayed over time, on February 27, 2015, in Purwakarta, Indonesia. Dozens of trains are stacked on top of each other in what looks like a post-apocalyptic world. The old electric trains that travelled in and out of Jakarta, Indonesia, are weathered and decayed over time. The trains were used everyday since the 1980s and carried thousands of people to work. Now the carriages, which were once the lifeblood of public transport in the south-Asian city, have been left to rust among shrubbery. (Photo by HKV/Barcroft Media)

A chevrotain or mouse deer feeds in its enclosure at Zurich Zoo, Zurich, Switzerland, October 17, 2012. (Photo by Patrick B. Kraemer/AP)