In 2010, tablets were supposed to be the new hot thing. Apple released the first iPad, Samsung was working on the Galaxy Tab and countless others were about to flood the market with Android tablets. Six years later, there weren’t any tablets at Mobile World Congress in Barcelona. Companies and consumers have moved on. Tablets are dead.
Imagine time running backwards. People would grow younger instead of older and, after a long life of gradual rejuvenation – unlearning everything they know – they would end as a twinkle in their parents' eyes. That’s time as represented in a novel by science fiction writer Philip K Dick but, surprisingly, time’s direction is also an issue that cosmologists are grappling with.