Doubling human life expectancy in a century is our greatest achievement, says author Steven Johnson. How did we make it happen -- and can we keep it going? Backed by fascinating historical anecdotes, he shares some life-lengthening innovations and reminds us of three key things needed to make sure all of humanity enjoys these advancements in health.
How humanity doubled life expectancy in a century | Steven Johnson | TED Talks Society and Culture podcast - Listen or read transcript on Metacast
