From Nature:
Desert spiders are master engineers
A spider living in the Sahara Desert excavates its burrow by hauling out bundles of sand fastened with silken cords, while another carries sand balls in a ‘basket’ of its own bristles.
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A similar basket evolved independently in desert ants, the authors note.More.
See also: Evolution appears to converge on goals—but in Darwinian terms, is that possible?