If you're worried about a dystopian future where robots take over the earth, perhaps this will calm your nerves. Twitter user Nathan Lawrence, a self-described "connoisseur of weird robot vacuum ...

What do door springs do? Apparently, more than just stop your door from causing damage! Those door springs attached to the walls in your home are there to protect your wall and paint from scratches ...

Many people have door springs in their homes to stop their doors from banging against the walls, causing all sorts of damage. And some children might have discovered the satisfaction in twanging them ...