Examples of sketches by great scientists

NAME FIELD
TIME & PLACE
EXAMPLE SOURCE
Crick biology
1916-2004
U.K. DNA helix Christie's
Einstein physics
1878-1955
U.S. light deflection Max-Plank-Institute
Poincaré mathematics 1854-1912 France sketch Miller (1996)
Edison inventor 1847-1931 U.S. designs for filaments Israel (1998)
Darwin biology
1809-1882
England abstract tree Wikipedia
Lomonosov meteorology
1711-1765
Russia drawing of aurora Northwestern University
Leibniz mathematics
1646-1716
Germany notebook Ritterkatalog
Newton physics
1643-1727
England flow around a cylinder Trinity notebooks
Descartes mathematics
1596-1650
France sketch of a field Gaukroger (1998)
Galileo astronomy
1564-1642
Italy sketch of saturn Rice University
da Vinci art, science
1452-1519
Italy eclipse, optics... Codex Leicester

These examples show that the distinction between science and art is illusory.
Artists need to know 'some science,' scientists need practical artistic experience.
Indeed, everyone needs both.