Why is the universe expanding at an even faster rate? What is the nature of the 'dark matter' that makes up almost a quarter of the universe? Why does the universe appear fine-tuned for life? And are there other universes besides our own? In this timely and original book, science writer Anil Ananthaswamy sets out in search of the world's most audacious physics experiments: the telescopes and detectors that promise to shed new light on dark matter, dark energy and quantum gravity - and answer some of the most profound questions that confront humanity. Weaving together stories about the people and places at the heart of this research, while beautifully explaining the problems that scientists are trying to solve, Ananthaswamy provides a unique portrait of the universe and our quest to understand it. An atmospheric, engaging and illuminating read that shows us that, at its heart, science is a field that attracts us all. The Edge of Physics brings cosmology - with all its rarefied concepts - back down to earth.