A collection of essays about science, that while covering a wide range of topics is still clearly set at time of writing (the early 1970s). Science moves relatively fast, so it's inevitable that some of what's written here is out of date, but a lot of it still holds up, being concerned with, for instance, developments in the history of science as well as predictions for the far future. In general, I found the future-focused essays more interesting than the science-past theme. Partly this was because a lot of the ground covered in the latter was already known to me, and partly because the former had two areas of interest. There are the predictions themselves, and then there's the more distanced, reader view of looking back at how those predictions match up with the world of 50 odd years ago. Would our view of the amusement parks of the future be any more accurate, I ask myself? I suspect not, but those views would say something about us to our descendants...