A couple of years ago, a group of entrepreneurs successfully Kickstarted a little something known as the Chameleon Pen. In a nutshell, it's an art pen that changes color tone as you draw – for example ...

It's every fashionista's dream, said Marc Bain at Quartz: a coat that can change color so it always complements the rest of your outfit. Such chameleon clothing is now closer to reality, thanks to a ...