New posts on SciAm blogs

On the Guest Blog – two posts today.

First, in a response to an SA article that was perhaps a little bit too optimistic, Joseph A. Dick offered a detailed analysis – Helium Hokum: Why Airships Will Never Be Part of Our Transportation Infrastructure

Charles Q. Choi nabbed a big name today – Too Hard for Science? E. O. Wilson–A Vertical Map of Life on Earth.

Over on the Expeditions blog, Wendy Whitcombe – one of the students in the Problems Without Passports course – penned her first post: Some History Should Not Repeat Itself

And on the Anecdotes from the Archive, Mary Karmelek discovered another gem in the SciAm archives: How to Find the True Shape of a Soldier.

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