In the Thuringian Forest or the Harz Mountains, dead spruce trees (Picea abies) dot the landscape like skeletons. Many have ...

A mixture contains different substances that are not chemically joined to each other. For example, a packet of sweets may contain a mixture of different coloured sweets.

Embalmers’ mixtures at Saqqara may not correspond, say, to those used around 700 years earlier for King Tutankhamun (SN: 11/2/22). Mummy embalming instructions ...