UPDATE much later: most of the links in this post are dead, but happily rights to my Cosmos article reverted to me a long time ago, and it’s now freely available here: Click to access wedel-2011-we-are-all-airheads.pdf – – – – – – – – – – – – – – – – – – – – Busy days. I just published a popular article on skeletal pneumaticity as a web feature at the Australian science magazine Cosmos.