Rock and Metal have changed a lot through time. The most famous bands in metal history were classic rock, Trash metal, psychedelic. Now at days rock and metal aren't famous but the most known are: speed metal, hard rock, and thrash metal.

There are a lot of bands, for example:

Pink Floyd:

Pink floyd were an English rock band formed in London in 1965. They emerged from London's underground music scene during the late 1960s, and became one of the most commercially successful and influential groups in popular music history.

 Metallica:

The band was formed in 1981 in Los Angeles by vocalist/guitarist Hetfield and drummer Lars Ulrich, and has been based in San Francisco for most of its career.The group's fast tempos, instrumentals and aggressive musicianship made them one of the founding "big four" bands of thrash metal

 

Megadeth:

Is an American heavy metal band from Los Angeles, California. Guitarist Dave Mustaine and bassist David Ellefson formed the band in 1983 shortly after Mustaine's dismissal from Metallica.

Talking about known genders lets talk about famous bands like Megadeth and Metallica, these are one of the top metal bands in the world. These two bands become big around the ’80s, and they are still really famous, lots of people go to their concerts and still listening to their music even though they are old. This phenomenon shows us how rock and metal can still be alive and rock over the years. And how people have passion and loyalty for what they listen, because maybe it has a big meaning for them in their lifes; maybe because they born listening to rock and metal or they had really good times listening to it, the point is that rock and metal are still alive no matter what.