New analysis into the residue inside ancient ceramic vessels from 11th–12th century Jerusalem has found that they were potentially used as hand grenades.Previous research into the diverse sphero-conical containers, which are within museums around the world, had identified that they were used for a variety of purposes, including beer drinking vessels, mercury containers, containers for oil and containers for medicines.This latest research, led by Griffith University's Associate Professor Carney Matheson, confirmed that some vessels did indeed contain oils and medicines, and some contained scented oils, consistent with other recent research into the use of the vessels.However, his findings also revealed...