The Martians wore no clothing.  Their conceptions of ornament and
decorum were necessarily different from ours; and not only were they
evidently much less sensible of changes of temperature than we are,
but changes of pressure do not seem to have affected their health at
all seriously.  Yet though they wore no clothing, it was in the other
artificial additions to their bodily resources that their great
superiority over man lay.  We men, with our bicycles and road-skates,
our Lilienthal soaring-machines, our guns and sticks and so forth, are
just in the beginning of the evolution that the Martians have worked
out.  They have become practically mere brains, wearing different
bodies according to their needs just as men wear suits of clothes and
take a bicycle in a hurry or an umbrella in the wet.  And of their
appliances, perhaps nothing is more wonderful to a man than the
curious fact that what is the dominant feature of almost all human
devices in mechanism is absent--the _wheel_ is absent; among all the
things they brought to earth there is no trace or suggestion of their
use of wheels.  One would have at least expected it in locomotion.  And
in this connection it is curious to remark that even on this earth
Nature has never hit upon the wheel, or has preferred other expedients
to its development.  And not only did the Martians either not know of
(which is incredible), or abstain from, the wheel, but in their
apparatus singularly little use is made of the fixed pivot or
relatively fixed pivot, with circular motions thereabout confined
to one plane.  Almost all the joints of the machinery present a
complicated system of sliding parts moving over small but beautifully
curved friction bearings.  And while upon this matter of detail, it is
remarkable that the long leverages of their machines are in most cases
actuated by a sort of sham musculature of the disks in an elastic
sheath; these disks become polarised and drawn closely and powerfully
together when traversed by a current of electricity.  In this way the
curious parallelism to animal motions, which was so striking and
disturbing to the human beholder, was attained.  Such quasi-muscles
abounded in the crablike handling-machine which, on my first peeping
out of the slit, I watched unpacking the cylinder.  It seemed
infinitely more alive than the actual Martians lying beyond it in the
sunset light, panting, stirring ineffectual tentacles, and moving
feebly after their vast journey across space.