Pollen thought to come from a marijuana plant has been found in a grave in Gelderland dating back 4200 years.

The early bronze age grave is one of the many archaeological finds made by Dutch Rail staff while working on a new railway connection between the urban central belt of the Netherlands with the northeast of the country.
The grave was found five years ago but it has taken archaeologists several years to thoroughly investigate the remains, rail operator ProRail said in a statement. The findings are detailed in a 650-page book
As well as what is thought to be cannabis (sativa), the grave contained Meadowsweet. Both plants have medicinal and pain-relieving properties, leading archaeologists to believe the person in the grave may have been ill.
The grave itself was lined with wooden planks and, given the amount of Meadowsweet traces, the dead person may have been lain on a mat of the flowering plant, ProRail said.
A second grave found nearby is thought to have contained a child.