Touch screens on phones and tablets really have the X factor. Being able to text, phone or film something just by swiping your finger on glass almost makes up for all those other failed sci-fi promises of the 60s.
But considering how futuristic touch screens seem, they rely on a bit of physics that’s almost as old as Newton — capacitance — and the fact that your finger is three parts salty water.
Some of the earliest iron artefacts ever found – funeral beads strung around bodies in a 5000-year-old Egyptian cemetery – came from outer space, archaeologists have confirmed.
High-tech scanning of the beads, discovered by British archaeologists in the Lower Egypt village of el-Gerzeh in 1911, shows the metal came from a meteorite that landed on Earth.