Here are all the clues we've found about Snapchat's secret smart glasses

Snapchat's hardware ambitions are supposed to be a secret. Yet, there have been enough clues left behind (thanks to a combination of LinkedIn and the Sony hack) for us to begin piecing together a picture of what exactly Snapchat is up to.

The company started its eyewear ambitions as early as 2014, and most recently joined a Bluetooth special interest group as an "adopter" - an indicator that it's going to use that technology potentially in its secret glasses.

Here's what we know so far about Snapchat's secretive hardware plans: