Cremation is a method of final disposition of a dead body through burning.
Cremation may serve as a funeral or post-funeral rite and as an alternative to burial. In some countries, including India and Nepal, cremation on an open-air pyre is an ancient tradition. Starting in the 19th century, cremation was introduced or reintroduced into other parts of the world. In modern times, cremation is commonly carried out with a closed furnace (cremator), at a crematorium.
Cremation leaves behind an average of 2.4 kg (5.3 lbs) of remains known as "ashes" or "cremains". This is not all ash but includes unburnt fragments of bone mineral, which are commonly ground into powder. They do not constitute a health risk and may be buried, interred in a memorial site, retained by relatives or scattered in various ways.
Cremation dates from at least 17,000 years ago in the archaeological record, with the Mungo Lady, the remains of a partly cremated body found at Lake Mungo, Australia.
Alternative death rituals which emphasize one method of disposal – burial, cremation, or exposure – have gone through periods of preference throughout history.
In the Middle East and Europe, both burial and cremation are evident in the archaeological record in the Neolithic era. Cultural groups had their own preferences and prohibitions. The ancient Egyptians developed an intricate transmigration-of-soul theology, which prohibited cremation. This was also widely adopted by Semitic peoples. The Babylonians, according to Herodotus, embalmed their dead. Phoenicians practiced both cremation and burial. From the Cycladic civilization in 3000 BCE until the Sub-Mycenaean era in 1200–1100 BCE, Greeks practiced burial. Cremation appeared around the 12th century BCE, probably influenced by Anatolia. Until the Christian era, when inhumation again became the only burial practice, both combustion and inhumation had been practiced, depending on the era and location. In Rome's earliest history, both inhumation and cremation were in common use among all classes.