Sleep          is              one            of   
        those           funny          things
about          being           a              human
        being           -              you  
have           to              do             it.  
        Have            you            ever 
wondered       why?            And            what 
        about           the            crazy
dreams         everyone        has?           Like 
        the             one            where
a              bad             person         is   
        chasing         you            and  
you            can't           run            or   
        yell.           Does           that 
make           sense?          We             all  
        know            how            sleep
looks.         When            we             see  
        someone         sleeping       we   
recognize      the             following      characteristics:
        If              possible,      the  
person         will            lie            down 
        to              go             to   
sleep.         The             person's       eyes 
        are             closed.        The  
person         doesn't         hear           anything
        unless          it             is   
a              loud            noise.         The  
        person          breathes       in   
a              slow,           rhythmic       pattern.
        The             person's       muscles
are            completely      relaxed.       If   
        sitting         up,            the  
person         may             fall           out  
        of              his            or   
her            chair           as             sleep
        deepens.        Occasionally   during
sleep          the             person         rolls
        over            or             reconfigures
his            or              her            body.
        This            happens        approximately
once           or              twice          an   
        hour.           This           may  
be             the             body's         way  
        of              making         sure 
that           no              part           of   
        the             body           or   
skin           has             its            circulation
        cut             off            for  
too            long            a              period
        of              time.          In   
addition       to              these          outward
        signs,          the            heart
slows          down            and            the  
        brain           does           some 
pretty         funky           things.        In   
        other           words,         a    
sleeping       person          is             unconscious
        to              most           things
happening      in              the            environment.
        The             biggest        difference
between        someone         who            is   
        asleep          and            someone
who            has             fainted        or   
        gone            into           a    
coma           is              the            fact 
        that            a              sleeping
person         can             be             aroused
        if              the            stimulus
is             strong          enough.        If   
        you             shake          the  
person,        yell            loudly         or   
        flash           a              bright
light,         a               sleeping       person
        will            wake           up.  
For            any             animal         living
        in              the            wild,
it             just            doesn't        seem 
        very            smart          to   
design         a               mandatory      8-hour
        period          of             near-total
