Drexel’s Imaging Agent Uses Why societies collapse | Jared Diamond 1 day ago   02:03

Drexel University
Using the electrical impulses generated by the heart to carefully illuminate the picture, an ultrasound contrast dye created by Drexel University researchers Steven Wrenn, PhD, and Brett Angel, PhD, is giving doctors a clearer look at the most camera-shy organ in the body. Enabling the heart to take a selfie, of sorts, means doctors could eventually be able to see the early signs of heart disease and treat it before it becomes deadly.

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Why societies collapse | Jared Diamond Drexel’s Imaging Agent Uses 1 day ago   19:49

TED
http://www.ted.com Why do societies fail? With lessons from the Norse of Iron Age Greenland, deforested Easter Island and present-day Montana, Jared Diamond talks about the signs that collapse is near, and how -- if we see it in time -- we can prevent it.