How 2015 became the year of the hoverboard

They don’t fly, but that hasn’t stopped their endless rise.Christopher Furlong/Getty Images Chances are someone you know unwrapped a hoverboard on Christmas morning. The self-balancing skateboards were among the most popular toys of 2015 — and the most controversial. That’s because they’ve demonstrated an alarming propensity to catch on fire. The federal government is investigating them. Major airlines have banned them. Amazon in the UK told customers who bought hoverboards that, actually, they should probably […]