The Cloud of Unknowing is a late medieval English mystical text; it has inspired Catherine Keller's title Cloud of the Impossible. A cloud seems fairly diffuse; territory sounds more solid: terra-Earth. However, The Territories of Science and Religion is unsettling for those who assume to be on firm ground when reflecting on religion and on science. And if one considers the articles in this issue, we are in cloudy territory: What have atoms, demons, and E-meters to do with each other? In this issue of Zygon: Journal of Religion and Science, we continue half a century of studies and discussions, all in one way or another engaging science and technology, religions and worldviews, and contemporary societies and individuals.