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Dark foliage
Jymesion wrote:
On Fri, 09 Aug 2013 09:29:41 +0100, Jeff Layman wrote: It's interesting that nature didn't come up with the wheel, one of the most energy-efficient ways of moving around (or did I read a few years ago that there was some strange organism which could move like a wheel? That's a question which comes up frequently. There's an interesting paper on it at: http://www.jstor.org/discover/10.230... 102539587717 The current consensus is that the main problem with biological wheels is blood flow, but this author addresses a different argument. I haven't seen this article, I will have a look time permitting. One reason a wheel is not much use for transport biologically is that they require roads to be efficient. Legs are much better on broken ground and can be adapted to climbing, become wings, flippers etc. Also have a look at the bacterial flaggelum, it isn't a wheel that supports weight for transport but it does rotate and it is powered by biochemistry. David |
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