While your average second-century Roman would be dumbstruck by your car or your smartphone, there is one piece of daily gear he would likely fail to be impressed by: your razor. For all of the industry’s vaunted technological advances, a sharp bit of metal is precisely what he might use to tame his whiskers, too. Surely by the 21st century, we should be shaving with lasers, he might propose, had he any idea what a laser was.
Laser shaving is an idea that’s been considered since the 1970s, first dismissed for the obvious safety challenges, and, a decade ago, proposed again, this time using the light traveling along an optical fiber to do the cutting. It’s still just a concept, great for the next Star Trek movie perhaps. All the 21st century seems to have offered in the shaving department is, well, more sharp bits of metal stacked on top of one another.
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