What is consciousness?

Understanding what consciousness is, and why and how it evolved, is perhaps the greatest mystery known to science. Click here to subscribe to The Economist on YouTube: http://econ.trib.al/rWl91R7 Check out Economist Films: http://films.economist.com/ Check out The Economist’s full video catalogue: http://econ.st/20IehQk Like The Economist on Facebook: https://www.facebook.com/TheEconomist/ Follow The Economist on Twitter: https://twitter.com/theeconomist Read our Tumblr: http://theeconomist.tumblr.com/ Follow us on Instagram: https://www.instagram.com/theeconomist/ Check out our Pinterest: https://uk.pinterest.com/theeconomist/ Follow us on LINE: http://econ.st/1WXkOo6