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String
theory,
which
posits
that
all
the
forces
of
nature
stem
from
stringy
thingies
wriggling
in
nine
or
more
dimensions,
implies
that
our
cosmos
is
just
a
hillock
in
a
sprawling
"landscape"
of
universes,
some
with
radically
different
laws
and
dimensions
than
ours.
Chaotic
inflation,
a
supercharged
version
of
the
big
bang
theory,
suggests
that
our
universe
is
a
minuscule
bubble
in
a
boundless,
frothy
sea.
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