Last Updated：2025/12/30
Sentence
Thanks
to
Global
Positioning
Systems
we
can
see
that
Europe
and
North
America
are
parting
at
about
the
speed
a
fingernail
grows—roughly
two
yards
in
a
human
lifetime.
If
you
were
prepared
to
wait
long
enough,
you
could
ride
from
Los
Angeles
all
the
way
up
to
San
Francisco.
It
is
only
the
brevity
of
lifetimes
that
keeps
us
from
appreciating
the
changes.
Quizzes for review
Thanks to Global Positioning Systems we can see that Europe and North America are parting at about the speed a fingernail grows—roughly two yards in a human lifetime. If you were prepared to wait long enough, you could ride from Los Angeles all the way up to San Francisco. It is only the brevity of lifetimes that keeps us from appreciating the changes.
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