For the twentieth-century naturalist and poet Loren Eiseley, the relationship between human beings and the natural world has become unnatural, divided by the era of modern technology. Loren Eiseley's Writing across the Nature and Culture Divide analyses how the philosopher of science becomes a boundary crosser in time and space. Qianqian Cheng points to Eiseley's method of uniting science and the humanities to reflect on human evolution and the past and future role of science with a visionary and poetic imagination. Seizing the connectedness of living beings, Eiseley, and now Cheng, makes us aware of the presence of nature even in daily urban life. Qianqian Cheng unveils Eiseley's merits, showing the poet as a necessary voice in the urgent mission to make individuals realize their responsibility to respond ethically to the living world.