body{
    background-image: url(../img/fondo_einstein.jpg);
    flex-wrap: wrap;
    display: flex;
}

h1{
    font-size: 4em;
    text-align: center;
    background-image: url(../img/titulo.jpg);
    color:white;
    width: 100%;
}

p{
    background-color: white;
}

img{
    margin: 10px auto;
    border: 5px solid gray;
}