Time for some link stuff again!

First of all, in case you're looking for a plane, or if you are plain curious to know how much is in the air at a given moment: planefinder.net shows planes in real time, plus their flight path and information about both the plane and the distance, height, and so on. It's rather chilling to see how many airplanes are over Europe...

It looks like there might be a way to increase how well humans can see in the dark - though at the moment, it's mostly documented as a side effect of a specific cancer treatment, which is obviously not the thing one would want.

The bibliothèque numérique de Lyon has 55 digitised manuscripts in its collection, dating to the 5th to 10th century, as well as a large number of miniatures from manuscripts of the 5th to 16th century. And because they are wonderful people, the images are open licence, so you are free to use them however you want.

Not medieval at all, but still interesting: Here is a map of the different types of moccasins in North America, with linked instructions on how to make center-seam type shoes of that kind. And I instantly felt transported back to my teenage years, when I had a phase (a rather long one, actually) of being totally into Native American stuff, and tried to make my own shoes and clothes and stuff.