Google has a new thing where you put in a search term and it tells you what other terms showed a similar pattern of search over time since 2004, at least in the US. So of course I played around with it for way too long, but pretty much nothing of interest turned up. Except for one, strange thing. It seems that the time pattern shown by searching for the term “seed bank” is very highly correlated with a number of permutations of the search for “vitamin D deficiency.” Any idea why that should be?