#SciAmBlogs Friday - near-death on Titanic, invention of modern physics, PIN numbers, lousy social networks, planet-eating stars, and more.

Bora ZivkovicAbout the Author: Bora Zivkovic is the Blog Editor at Scientific American, chronobiologist, biology teacher, organizer of ScienceOnline conferences and editor of Open Laboratory anthologies of best science writing on the Web. Follow on Twitter @boraz.

The views expressed are those of the author and are not necessarily those of Scientific American.

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