Sunday, March 17, 2013

A Tangle of Spines

It makes you wonder why cactus grow in impenetrable clumps? What is the reason for such huge masses of spines? My guess is that they derive some advantage in extra protection from the accumulation of spines, giving them an edge in survival. But perhaps it is just a fluke and like large cities, a reaction to a whole multitude of forces, both seen and unseen. 

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