ITA Matrix is an advanced search tool that helps narrow down flight availability based on a number of specific factors. Here's what you need to know about it.

Is there such a thing as animated QR codes? And could they work? Even those who may not know how exactly QR codes work have pretty much been exposed to them by now.

Perhaps a combination of IR reflective and absorbing material could make large codes without being visible to the human eye. How would you make a machine-washable, machine-readable visual code?