Uncovering the neural basis of consciousness is a major challenge to neuroscience. In this Perspective, Tononi and colleagues describe the integrated information theory of consciousness and how it might be used to answer outstanding questions about the nature of consciousness.

What is time? Is time real, or a mere illusion? We seem to feel the passage of time in our consciousness but are doomed to encounter great difficulty when trying to get a deeper grip on the nature of time. As Augustine famously remarked, "if no one asks me about what time is, I know what it is, but if I wish to explain it to him who asks, I do not know". The present essay does not aim so much (...) at giving a complete answer to this intricate and difficult question as to focus on Zhuangzi to excavate the idea of time inherent in his philosophical writings. A second aim is to show how it relates to some of the contemporary concerns about time. More specifically, our concern is not about... (shrink)