Colorful
poison
frogs
in
the
Amazon
owe
their
great
____________________
to
ancestors
that
leapt
into
the
region
from
the
Andes
Mountains
several
times
during
the
last
10
million
years
,
a
new
study
from
The
University
of
Texas
at
Austin
suggests
.
This
is
the
?
rst
study
to
show
that
the
Andes
have
been
a
____________________
source
of
diversity
for
the
Amazon
basin
,
one
of
the
largest
____________________
of
biological
diversity
on
Earth
.
The
?
nding
runs
____________________
to
the
idea
that
Amazonian
diversity
is
the
result
of
evolution
only
within
the
____________________
forest
itself
.
"
Basically
,
the
Amazon
basin
is
a
'melting
pot'
for
South
American
frogs
,
"
says
graduate
student
Juan
Santos
,
lead
author
of
the
study
.
"
Poison
frogs
there
have
come
from
multiple
places
of
origin
,
notably
the
Andes
Mountains
,
over
many
millions
of
years
.
We
have
shown
that
you
cannot
understand
Amazonian
biodiversity
by
looking
only
in
the
____________________
.
Adjacent
regions
have
played
a
major
role
.
"
