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1859
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explained in the last chapter, 1859 1860 1861 1866 1869
has been explained, 1872

through natural selection 1859 1860 1861 1866
OMIT 1869 1872

←Subtitle not present 1859 1860 1861 Single Centres of supposed Creation . — 1866 1869 1872
distinctly limited in 1859 1860 1861 1866
clear in the case of 1869 1872

such cases as 1859 1860 1861 1866
OMIT 1869 1872

having been formerly united to Europe, and consequently 1859 1860 1861 1866
OMIT 1869 1872

quadrupeds. 1859 1860 1861 1866
quadrupeds with the rest of Europe, for they were no doubt once united. 1869 1872

is also obvious that the individuals of the same species, though now inhabiting distant and isolated regions, must have proceeded from one spot, where their parents were first produced: for, as explained in the last chapter, it is incredible that individuals identically the same should
ever
ever
have been produced through natural selection from parents specifically distinct.
We are thus brought to the question which has been largely discussed by naturalists, namely, whether species have been created at one or more points of the
earths
earth's
surface. Undoubtedly there are
very
very
many cases of extreme
difficulty
difficulty,
in understanding how the same species could possibly have migrated from some one point to the several distant and isolated points, where now found. Nevertheless the simplicity of the view that each species was first produced within a single region captivates the mind. He who rejects it, rejects the
vera
vera
causa
causa
of ordinary generation with subsequent migration, and calls in the agency of a miracle. It is universally admitted, that in most cases the area inhabited by a species is continuous; and
that when
when
a plant or animal inhabits two points so distant from each other, or with an interval of such a nature, that the space could not
have been
be
easily passed over by migration, the fact is given as something remarkable and exceptional. The
incapacity
capacity
of migrating across
a wide
the
sea is more distinctly limited in terrestrial
mammals
mammals,
than perhaps
with
in
any other organic beings;
and
and,
accordingly, we find no inexplicable
instances
cases
of the same
mammals
mammal
inhabiting distant points of the world. No geologist
will
will
feels
feel
any difficulty in such cases as Great Britain having been formerly united to Europe, and consequently possessing the same quadrupeds. But if the same species can be produced at two separate points, why do we not find a single mammal common to Europe and
Australia
Aus- tralia