It's taken yoga several thousand years to journey from a handful of monasteries dotting the Himalayas to the myriad studios of London, Lower Manhattan, and beyond. Whether bathing with holy men in the Ganges or joining the chorus of a thousand voices chanting "om," photographer Michael O'Neill decided to devote himself to experiencing and recording the world of yoga at this critical juncture in its history. The result is a powerful photographic tribute to the age-old discipline turned global phenomenon, with over 250 million practitioners united in physical, spiritual, and mindful practice worldwide.