Rapidly evolving camera technology is changing our very notion of photography.
Modern illumination is not only much more efficient, but increasingly responsive to the rhythms of human life.
For most organisms the absence of light is vital, too.
One of the basic certainties that unites all life on this planet: night follows day follows night. But then we started to mess with it.
Everywhere you turn, optical engineering is at the heart of new technologies. No wonder 2015 has been named the Year of Light.