It is interesting that although image search does not have feature of finding recent images, when you do a web search for recent pages, you could get a "onebox" of image results... presumably the images in this onebox are from "recent" pages. That's one part of the point I want to make.

The other part is this... when I searched for a term "worst nightmare" within last 1 year, I got a onebox that contained an adult pic. Try it out... safe search breached?

correction, my safe search was off during the search.