Every day that you learn something is a good day. Today I stumbled over nature printing, via this slideshow on the Guardian website.
Nature printing means using objects from nature to make produce an image. It ranges from leaves
Which, given the past week's theme, feels like a good full stop.
Sage leaf imprint on a page of Leonardo's Codice Atlantico
Cyanotype from Anna Atkin's 'Photographs of British Algae'
Print made from a slice of a meteorite