You know Darwin sailed, famously, on The Beagle. But did you know he also sailed on another boat? Check it out.
More Bird Body Part Blogging: Spurs and blades on the wings of jacanas, lapwings, sheathbills and archaeotrogonids (clubs, spurs, spikes and claws part II)
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There's an interesting question in the comments of the last solar sail post:
I have a question that's been bugging me about solar sails for ages: what about the fact that light pressure falls off over distance? Every time I see the idea discussed, this is never mentioned...
"Greatness is not in were we stand, but in what direction we are moving. We must sail sometimes with the wind, and sometimes against it - but sail we must. And not drift, nor lie at anchor." –Oliver Wendell Holmes
Last week I spent some time writing about Dimetrodon and the various functions paleontologists ascribed to