Okay kiddo, let's talk about progressive rock and its timeline.
Imagine a big tree that grows and changes over time. That's kind of like progressive rock - it started in the late 1960s and grew and changed over the years.
In the beginning, progressive rock was a new kind of music that combined elements of rock and roll with things like jazz and classical music. Bands like Pink Floyd and King Crimson were really important in the early days of progressive rock.
As the 1970s came along, progressive rock started to branch out and become more diverse. Some bands, like Yes and Genesis, started to use more complex instruments and longer songs. Others, like Rush and Jethro Tull, began to combine elements of folk and blues with their progressive rock sound.
Over time, progressive rock became even more experimental and took inspiration from all sorts of different sources. Bands like Frank Zappa and King Gizzard & the Lizard Wizard explored new musical styles and experimented with different sounds.
Today, progressive rock is still evolving and changing. There are new bands like Tool and Porcupine Tree that are carrying on the progressive rock tradition while also putting their own spin on it.
So that's the timeline of progressive rock, kiddo. Just like a tree, it's always growing and changing, and there's no telling where it will go next!