For more and more of us, climate change is shifting from a shadowy fear in the backs of our minds to something we feel we need to get a handle on. Climate change may be a horror story, but, as Our Biggest Experiment shows, the tale of how we discovered it isn't. The discovery of climate change didn't feature a Eureka! moment it was a slow and gradual realisation as each new generation pieced together a little more information. A history of the the climate crisis.