Light and Dark is essentially the story of everything we know about the Universe. And everything we still don't know about it.

Light is such an organic, integral part of the mechanism by which we perceive the world around us that we take it for granted.

And it is not.

See how our knowledge of light was expanded by the findings of Galileo, Kepler, Hooke, Newton and Young, among others. Find out how many discoveries are yet to come.

What is dark matter? What is the source of mysterious cosmic signals? How did the first galaxies form? Many questions still await answers.