More marine life is living on some World War II munitions disposed of on the Baltic Sea's seabed than on the sediment surrounding it. The findings, reported in a paper in Communications Earth & Environment, show that some marine organisms can tolerate high levels of toxic compounds if there is a hard surface for them to inhabit. The results also demonstrate how detritus from human conflict can provide habitats for wildlife, which is similarly shown in a Scientific Data study mapping a fleet of World War I shipwrecks in Maryland, U.S.