can
a
smile
from
a
distance
of
90
meters
.
It's
one
of
the
oldest
and
most
basic
forms
of
.
Smiles
and
laughs
mean
the
same
thing
in
all
cultures
.
It
doesn't
matter
if
you
are
in
London
or
Lisbon
,
New
York
or
New
Delhi
,
we
all
understand
what
they
mean
.
They
joy
without
words
.
They
are
signs
of
peace
and
happiness
.
A
smile
or
a
laugh
can
be
.
Maybe
you
have
that
when
people
around
us
smile
or
laugh
,
we
usually
do
the
same
.
This
type
of
interests
gelotologists
:
specialists
who
study
the
and
effects
of
smiles
and
laughter
.
They
believe
that
millions
of
years
ago
,
before
languages
started
to
,
these
helped
humans
to
form
.
Nowadays
,
the
same
gestures
can
help
us
in
our
stressful
lives
.
Studies
show
that
people
live
longer
when
they
more
time
with
groups
of
happy
friends
.
But
why
exactly
are
smiling
and
laughing
good
for
our
health
?
Is
there
a
scientific
?
Well
,
according
to
experts
,
there
is
.
Studies
have
shown
that
laughter
and
smiles
both
the
brain
to
"
happy
"
chemicals
into
the
body
.
These
chemicals
stress
and
help
to
the
body's
.
The
same
chemicals
can
also
reduce
.
Laughing
is
also
good
for
your
heart
and
lungs
,
and
20
seconds
of
laughter
has
the
same
health
as
three
minutes
of
exercise
.
Because
of
these
healthy
effects
,
laughter
has
become
more
and
more
popular
.
Laughter
yoga
,
for
example
,
was
started
by
an
Indian
doctor
in
Mumbai
in
1995
and
there
are
now
more
than
8
,
000
groups
around
the
world
.
At
laughter
yoga
sessions
,
people
meet
,
play
,
and
laugh
.
As
a
result
,
they
feel
happier
and
healthier
.
Laughter
therapy
is
also
in
hospitals
now
.
The
idea
of
"
clown
care
"
started
in
New
York
in
1978
,
when
a
doctor
named
Patch
Adams
started
to
dress
as
a
clown
and
make
sick
children
laugh
.
in
a
hospital
are
usually
and
often
bored
,
but
hospital
clowns
can
help
them
to
be
happier
and
more
,
and
this
helps
people
to
get
better
faster
.
So
,
if
we
smile
more
,
we
might
all
be
a
lot
happier
and
healthier
.
Strangely
,
it
seems
that
if
we
or
a
smile
,
it
can
have
exactly
the
same
effects
as
a
real
smile
.
So
if
you're
unhappy
,
just
smile
or
try
to
laugh
and
you
should
feel
better
.
A
smile
makes
the
world
a
warmer
place
,
and
because
smiles
and
laughter
are
free
,
maybe
we
should
be
more
with
them
.
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