The song "Watching The Grass Grow" by Hawkwind describes the experiences of survivors who have travelled through time and are now living in a post-apocalyptic world. The lyrics speak of various scientific and technological advancements, such as Particle Accelerators, Morality Degenerators, and Hyperspatial Conflagrators. The song also refers to the aftermath of a neutron bomb exploding and wiping out all history and mystery. Despite the destruction, the survivors are now trying to create a better world by letting nature take its course and watching the grass grow. However, they are aware of the media's power to manipulate and destroy, causing the flowers to be blown away. The song also mentions the post-future reality and a surreal world, highlighting the uncertainty and chaos of the survivors' existence. The lyrics end with a question of whether they will survive, to which the answer is always yes. Overall, "Watching The Grass Grow" resonates with themes of survival, resilience, and the fragility of life in a post-apocalyptic world.