Rock music began in the 1960s at a time when musicians were looking to explore new areas other than just the usual romantic themes. The roots of rock music go back to the 1940s rock and roll music besides it is also heavily influenced by folk, blues and jazz. The main feature of rock music is the electric guitar on which the whole setup is usually centered on. After more than 50 years of its birth it has become a highly diverse genre with a lot of differences in styles and compositions. Although mainstream to a large extent, it focuses on live performances which are often accompanied by a display of musicianship which is rare in other forms of music. There are countless groups that have left their mark in this genre of music and here we look at some of the best rock bands of all time.