The Cistercian numerals are a forgotten number system, developed by the Cistercian monastic order in the early thirteenth century, much more compact than Arabic or Roman numerals: with a single character you could write any integer from 1 to 9999 [more: https://t.co/8TS1FZChbW]
Boiling coffee with a moka. This is a movie made with neutron images that shows the coffe making process. The movie was made by A. Kaestner at the cold neutron imaging beam line ICON at the Paul Scherrer Institute
[full video: https://t.co/uAw2TvPUAe]