Explore the profound questions surrounding the nature and definition of life in this thought-provoking 44-minute talk by science writer Carl Zimmer. Delve into the ambiguities and complexities of determining life's boundaries, from viruses to consciousness, as Zimmer discusses his book "Life's Edge: The Search for What It Means to Be Alive." Examine the characteristics of life, the intersection of science and art in understanding living systems, and contemplate the implications of our evolving comprehension of life. Consider intriguing topics such as the possibility of extraterrestrial life, common superstitions about life and death, and the human fascination with the afterlife and supernatural phenomena. Gain insights into why, despite significant scientific advancements, a comprehensive theory of life remains elusive, and reflect on the profound impact this ongoing quest has on our understanding of existence itself.