ke it, they knew the
zebra had no cause for alarm beyond a vague suspicion born of instinct
alone.

[Footnote A: Probably no race of man in all history has so stimulated
the imagination of scientists as that of Cro-Magnon Man. The origin of
the race is lost in antiquity, although its arrival on the scene was
supposed to have taken place between 35,000 and 20,000 B.C. It is
established, however, that hordes of the white-skinned, strong-thewed
cave-dwellers over-ran, long before the dawn of history, what today is
southern Europe and the Mediterranean Basin. This section of the earth's
surface was sparsely populated, at the time, by Neanderthal Man--the
last of the sub-human fore-runners of Homo Sapiens.

Immediate warfare raged between the two. The Cro-Magnards, while lacking
the tremendous muscles and long, ape-like arms of the Neanderthaloids,
were far more intelligent (as witness the dimensions of their heads; a
brain-case exceeding in size that of present day man), and gradually
eliminated the native Neanderthals. Between the two, there was little
difference in man-made weapons. The principal weapon of both was the
club; but, in Cro-Magnon's case, this was augmented by the flint knife,
clumsily shaped but effective. It is entirely possible that the latter
people made use of the rope, both as one of the amenities and as a
weapon of offense.

Cro-Magnon Man was the proud possessor of a virtue both new and
startling in a world given only to the struggle for survival. This
virtue was Leisure--a period in which he was free to do things other
than kill his enemies, hunt, and eat. He used his leisure to develop an
artistic sense that found its expression in the painting of everyday
scenes from his life. The walls of his cave served as a canvas; his
materials, principally ochre, he took from the earth. He was the first
Artist; and his paintings, still admirable considering the lack of
guiding precedence, have endured to this day.

In appearance, Cro-Magnon Man was ruggedly handsome, both in figure and
face. He was long-headed, with a short face patterned on the diamond.
The width was extreme, with high cheek-bones slanting up to a narrowing
forehead, and down to a short, firm chin. Above a long, finely moulded
mouth, the strong, usually prominent nose jutted out imperiously.

The female was considerably smaller than her mate, often reaching no
more than to his shoulders. Possibly she was lovely of face and figure;
we of