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Why you need a good night's sleep
BBC Learning English · health & sleep
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The
question
of
why
humans
sleep
is
not
easy
to
answer.
Yozib olish va solishtirish
In
terms
of
evolution,
why
would
it
make
sense
to
go
unconscious
every
night,
leaving
yourself
vulnerable
to
danger?
It
can
only
mean
that
the
benefits
gained
from
sleep
are
huge.
Here,
science
journalist
Ginny
Smith
explains
some
of
these
benefits
to
BBC
Radio
4
programme,
Inside
Science.
So
we've
probably
all
experienced
this,
that
if
you've
had
a
bad
night's
sleep
and
then
you
try
and
do
some
work,
you
just
can't
concentrate.
Your
brain
isn't
in
the
right
state
to
take
in
new
information.
But
we
also
need
to
sleep
after
we've
learnt
new
things,
because
that's
when
our
brain
consolidates
the
information
-
takes
it
from
short-term
storage
to
long-term
storage,
fits
it
in
with
other
things
we
already
know,
that
old
adage
of
if
you've
got
a
problem,
sleep
on
it
-
your
brain
does
actually
work
on
things
during
the
night,
and
you
can
often
wake
up
and
have
solved
the
problem
in
your
sleep.
When
we
sleep,
our
brains
refresh,
leaving
us
feeling
rested
in
the
morning.
But
after
a
bad
night's
sleep,
it's
more
difficult
to
concentrate
-
we
can't
take
in,
or
understand,
new
information.
We
also
have
the
saying
if
you've
got
a
problem,
sleep
on
it.
To
sleep
on
it
means
to
delay
making
a
decision
until
you've
had
time
to
think
about
it.
But
that
also
turns
out
to
be
true,
scientifically
speaking.
During
sleep,
your
brain
really
can
work
out
problems
and
find
solutions.
Bugun
Speaking
Shadowing
Lug'at
Slang
Grammatika