Physicist Geoffrey West has found that simple, mathematical laws govern the properties of cities — that wealth, crime rate, walking speed and many other aspects of a city can be deduced from a single number: the city’s population. In this mind-bending talk from TEDGlobal he shows how it works and how similar laws hold for organisms and corporations.
http://www.ted.com/talks/geoffrey_west_the_surprising_math_of_cities_and_corporations.html
Tagged with ted cities urbanisation population corporations
The face of nuclear terror has changed since the Cold War, but disaster-medicine expert Irwin Redlener reminds us the threat is still real. He looks at some of history’s farcical countermeasures and offers practical advice on how to survive an attack.
About Irwin Redlener
Dr. Irwin Redlener spends his days imagining the worst: He studies how humanity might survive natural or human-made disasters of unthinkable severity.
http://www.ted.com/talks/irwin_redlener_warns_of_nuclear_terrorism.html