body{
 

    background-image: url(../img/fondo_einstein.jpg);
    display: flex;
    flex-wrap: wrap;
   
}
h1{
    color: white;
    background-image: url(../img/titulo.jpg);
     margin: 15px auto;
     width: 100%;
     text-align: center;
}
p{
    background-color: white;
}
img{
    border: 10px solid grey;
    margin: 10px auto;
}