The creation of one of the oldest surviving astronomical documents, from the Babylonian library of Ashurbanipal around 1600 BC - a 21-year record of the appearances of Venus (which the early Babylonians called Nindaranna).
... this time are passed on to ferredoxin, and then to an enzyme called NADP+ reductase[?] which uses them to drive the reaction
NADP+ + H+ + 2e- → NADPH
Thi ...