Happy birthday to #geochemist Charles David Keeling (1928 - 2005) whose decades long observations of CO2 in air samples from Mauna Loa Observatory were some of the 1st direct data to show the human contribution to greenhouse effect & global warming. The 'Keeling Curve' (in copper & red) shows both the seasonal variations (the wiggles) & the strong upward trend with time as the greenhouse gas built up in the atmosphere. 🧵1/

#linocut #printmaking #climateChange #geochemistry #sciart #MastoArt

Happy birthday to Antonie van Leeuwenhoek (1632 – 1723), the Dutch scientist & progenitor of #microbiology known for his improvements to microscope tech. He was a draper in Delft, then a politician with an interest in lensmaking. Using his handmade #microscopes, he was 1st to observe microorganisms, which he called tiny animals, or "animalcules". He also made pioneering microscopic observations on muscle fibres, bacteria, coffee & … 🧵1/n

#linocut #printmaking #sciart #histstm⁠ #MastoArt