Diane Ackerman is a poet who happens to write about science. Her latest book, The Human Age, is about the unprecedented fact that the human race is now the single dominant force of change on the planet. Humans have “subdued about 75 percent of the land surface, concocted a wizardry of industrial and medical marvels, strung lights all across the darkness.” Ackerman acknowledges the chaos humans have caused to the environment and yet she is still “enormously hopeful,” as she writes in the book, about how positive our interaction with Earth can be. We ask Ackerman about a few little things in this Kirkus TV interview: nature, evolution, humanity.