Iron

Iron is a great material for making tools. But the oldest known iron [artefacts:jewellery] were actually [intended:conscious] for decoration: nine Egyptian beads that date back to 3200 B.C. And now we know that this ancient jewellery has an even more impressive origin - the iron out of which it was [crafted:drafted] came from space. The metal cylinders were discovered in Egypt in 1911. To analyze the structure and chemical composition of the beads, researchers [bombarded:shelled] them with neutrons and gamma rays. The tests [revealed:sealed] that the jewellery contained trace elements not present in Earthly ores - but that are found in iron-rich meteorites. The study is in the Journal of Archaeological Science.