It wasn’t that long ago when it was fashionable to have the smallest cellphone possible; there are even jokes about it in popular films. But now that we are all obsessed with larger smartphone screens, you might have thought the micro machine trend was dead. Turns out, the world of micro tech has only been getting bigger. Nowadays, there are machines thinner than a strand of hair that are capable of amazing things. In fact, you might even have one in your pocket right now.