.news-img {
    width: 100%;
    height:170px;
    background-image: url('images/chiron.jpg');
    transition-property: all;
    transition-duration: 1000ms;
    transition-timing-function: ease-in-out;
}
.news-img:hover {
    background-image: url('images/royale.jpg');
}
I've watched a few tutorials about transitions, read some posts here and I still can't understand why my transition works? I've tried as well with:
transition: all 1s ease-in-out;
I know it's the same thing, but still doesn't work..
 
    