Manuscripts are collected by historians, archaeologists, and epigraphists. A manuscript is a written record of historical events that was historically handwritten but is now typewritten. Manuscripts can be as small as a notebook or as large as a volume of encyclopedias. In the modern world, most manuscripts are still letters, notes, or books from people who want to share their thoughts with others. But manuscripts also include legal documents such as wills and contracts, as well as recipes, maps, and even mathematical formulas. In addition to people, animals, and insects also collect manuscripts. Animals write using their feet, and insects use their bodies to store food for later consumption or disposal. The term "insect handwriting" has been used to describe the handwriting produced by certain species of insect including aphids, scale insects, and cockroaches. Insects only write in response to some form of stimulation; they do not produce writings as part of their normal behavior. However, some species of insect may choose to leave their mark on non-living objects such as wood or paper if given the opportunity. For example, a colony of carpenter ants will often build themselves a nest of wood chips near where they live. Inside the nest, the workers will sometimes leave their calling cards by writing the word "ant" inside their shelter.