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The article is quoted from the source VOA to serve English learners to practice listening and reading through daily news.

How Did a Man's Brain Turn to Glass 2000 Years Ago?

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2025-03-13 23:30:14
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How Did a Man's Brain Turn to Glass 2000 Years Ago?
Source: VOA
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audio
ago
ago
audio
story
story
audio
regular
regular
audio
long
long
audio
fire
fire
audio
wide
wide
audio
ago
ago
audio
story
story
audio
regular
regular
audio
long
long
audio
fire
fire
audio
wide
wide
audio
great
great
audio
into
into
audio
research
research
audio
bring
bring
audio
near
near
audio
middle
middle
audio
high
high
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building
building
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window
window
audio
know
know
audio
there
there
audio
human
human
audio
happen
happen
audio
amount
amount
audio
year
year
audio
because
because
audio
more
more
audio
other
other
audio
good
good
audio
alone
alone
audio
difficult
difficult
audio
people
people
audio
mean
mean
audio
during
during
audio
explain
explain
audio
black
black
audio
famous
famous
audio
keep
keep
audio
behind
behind
audio
also
also
audio
day
day
audio
little
little
audio
only
only
audio
modern
modern
audio
area
area
audio
than
than
audio
love
love
audio
help
help
audio
water
water
audio
usually
usually
audio
according to
according to
audio
air
air
audio
fast
fast
audio
quickly
quickly
audio
city
city
audio
think
think
audio
very
very
audio
today
today
audio
most
most
audio
old
old
audio
february
february
audio
before
before
audio
never
never
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audio
space
space
audio
lead
lead
audio
remain
remain
audio
mostly
mostly
audio
ever
ever
audio
extremely
extremely
audio
space
space
audio
lead
lead
audio
remain
remain
audio
mostly
mostly
audio
ever
ever
audio
extremely
extremely
audio
likely
likely
audio
process
process
audio
above
above
audio
case
case
audio
study
study
audio
over
over
audio
found
found
audio
attention
attention
audio
condition
condition
audio
almost
almost
audio
even
even
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audio
original
original
audio
such
such
audio
town
town
audio
ad
ad
audio
piece
piece
audio
rapidly
rapidly
audio
original
original
audio
such
such
audio
town
town
audio
ad
ad
audio
piece
piece
audio
rapidly
rapidly
audio
shortly
shortly
audio
writer
writer
audio
actually
actually
audio
leave
leave
audio
natural
natural
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audio
author
author
audio
glass
glass
audio
state
state
audio
wonder
wonder
audio
form
form
audio
then
then
audio
author
author
audio
glass
glass
audio
state
state
audio
wonder
wonder
audio
form
form
audio
then
then
audio
complex
complex
audio
whole
whole
audio
heat
heat
audio
surprise
surprise
audio
nature
nature
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audio
amazing
amazing
audio
brain
brain
audio
did
did
audio
a
a
audio
years
years
audio
man's
man's
audio
amazing
amazing
audio
brain
brain
audio
did
did
audio
a
a
audio
years
years
audio
man's
man's
audio
turn to
turn to
audio
how
how
audio
bed in
bed in
audio
paolo
paolo
audio
what
what
audio
it
it
audio
words
words
audio
disasters
disasters
audio
could
could
audio
from
from
audio
places
places
audio
have
have
audio
moving
moving
audio
and
and
audio
moves
moves
audio
volcano
volcano
audio
covering
covering
audio
fuego
fuego
audio
networks
networks
audio
unlikely
unlikely
audio
truly
truly
audio
layer
layer
audio
needed
needed
audio
italian
italian
audio
unexpected
unexpected
audio
animal tissue
animal tissue
audio
threat
threat
audio
proposed
proposed
audio
1960s
1960s
audio
something of
something of
audio
buried
buried
audio
lying
lying
audio
to the ground
to the ground
audio
thousands
thousands
audio
will
will
audio
finding
finding
audio
would
would
audio
resist
resist
audio
been
been
audio
occurrence
occurrence
audio
when
when
audio
lava
lava
audio
documentary film
documentary film
audio
published
published
audio
studied
studied
audio
temperatures
temperatures
audio
poorly
poorly
audio
this
this
audio
causing
causing
audio
fallen
fallen
audio
forms
forms
audio
shiny
shiny
audio
some time
some time
audio
arrived
arrived
audio
rocks
rocks
audio
naples
naples
audio
caused
caused
audio
augustus
augustus
audio
must
must
audio
krafft
krafft
audio
news agency
news agency
audio
parts
parts
audio
frozen
frozen
audio
lightning
lightning
audio
suddenly
suddenly
audio
one
one
audio
thought
thought
audio
naturally
naturally
audio
cool down
cool down
audio
made
made
audio
why
why
audio
known
known
audio
truth
truth
audio
adj
adj
audio
history's
history's
audio
maurice
maurice
audio
used
used
audio
crystallization
crystallization
audio
subjects
subjects
audio
collegium
collegium
audio
anthropologist
anthropologist
audio
wooden
wooden
audio
that is
that is
audio
metal
metal
audio
earth
earth
audio
changed
changed
audio
degrees
degrees
audio
ancient
ancient
audio
hot cloud
hot cloud
audio
surprising
surprising
audio
scientific
scientific
audio
covered
covered
audio
minerals
minerals
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pyroclastic flow
pyroclastic flow
audio
houses
houses
audio
adding
adding
audio
fate
fate
audio
theory
theory
audio
sent
sent
audio
were
were
audio
electron microscope
electron microscope
audio
roman emperor
roman emperor
audio
cells
cells
audio
geometrical
geometrical
audio
rock
rock
audio
discovered
discovered
audio
two
two
audio
pieces
pieces
audio
outer
outer
audio
told
told
audio
herculaneum
herculaneum
audio
who
who
audio
guardian
guardian
audio
noticed
noticed
audio
studied'
studied'
audio
about
about
audio
we
we
audio
affecting
affecting
audio
erupt
erupt
audio
clearly
clearly
audio
meteorite
meteorite
audio
blasts
blasts
audio
added
added
audio
run away
run away
audio
turned part
turned part
audio
no time
no time
audio
volcanoes
volcanoes
audio
rare
rare
audio
had
had
audio
intense
intense
audio
his
his
audio
clouds
clouds
audio
by
by
audio
giordano
giordano
audio
victims
victims
audio
forcefully
forcefully
audio
out of
out of
audio
being
being
audio
volcanic
volcanic
audio
citizens
citizens
audio
centimeter
centimeter
audio
mass
mass
audio
v
v
audio
left
left
audio
young man
young man
audio
erupted
erupted
audio
leaving
leaving
audio
bodies
bodies
audio
stayed
stayed
audio
katia
katia
audio
layers
layers
audio
has
has
audio
french
french
audio
eruption
eruption
audio
petrone
petrone
audio
meteorites
meteorites
audio
are
are
audio
settled
settled
audio
guido
guido
audio
these
these
audio
remains
remains
audio
pompeii
pompeii
audio
celsius
celsius
audio
suffer
suffer
audio
worship
worship
audio
nerve
nerve
audio
pier
pier
audio
flee
flee
audio
but
but
audio
hoped
hoped
audio
guatemala's
guatemala's
audio
explosion
explosion
audio
sudden
sudden
audio
reports
reports
audio
called
called
audio
came
came
audio
strange
strange
audio
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supported
audio
preserve
preserve
audio
shapes
shapes
audio
was
was
audio
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up to
audio
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its
audio
volcanologists
volcanologists
audio
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exposed
audio
identifiable
identifiable
audio
rome
rome
audio
tissues
tissues
audio
to send out
to send out
audio
happened
happened
audio
in time
in time
audio
melted
melted
audio
cities
cities
audio
'poorly
'poorly
audio
thick
thick
audio
afp
afp
audio
all
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audio
trying
trying
audio
vesuvius
vesuvius
audio
roman's
roman's
audio
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not
audio
hot blast
hot blast
audio
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can
audio
the first
the first
audio
rewrite
rewrite
audio
hotter
hotter
audio
survivability
survivability
audio
said
said
audio
erupting
erupting
audio
cooling
cooling
audio
burnt
burnt
audio
scientists
scientists
audio
showing
showing
audio
relating to
relating to
audio
mystery
mystery
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spread
spread
audio
with
with
audio
mount
mount
audio
spine
spine
audio
daily life
daily life
audio
spinal
spinal
audio
ash
ash
audio
using
using
audio
which
which
audio
evidence
evidence
audio
they
they
audio
for
for
audio
preserved
preserved
audio
hit
hit
audio
killed
killed
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