Those funky circles and squares you might see on a car’s bumper aren’t just for show—they actually come in handy if you ever need your car towed.

One example is the squares and circles that are often seen on a vehicle's bumper that, at first glance, don't seem to do anything at all. As it turns out, these seemingly random shapes on rear ...

Bumpers used to be a sometimes-unsightly part of cars, and now they’re integrated. Get the Popular Science daily newsletter💡 Breakthroughs, discoveries, and DIY tips sent every weekday.