What we see, even on the brightest summer's day, is only a fraction of what is really there. But we have been inventing new ways of seeing, delving ever deeper into the invisible world, for more then a century now. We can now 'see' heat, sound and all manner of exotic energies and radiations. We can look deep into our minds and witness fleeting thoughts. We can look back in time to the dawn of the universe and we can even see the particles that we think might be the fundamental building blocks of reality. And computer simulations powered by 21st-century mathematics are hinting that there are still greater truths to be glimpsed beyond the clumsy realms of light and matter. With over 100 incredible images that take us from inside the atom to the edge of our universe and beyond, this book explores our journey into worlds inaccessible to our natural senses.