But not just focus on these old larks
Because after all, the history of modern biology is much more fascinating!
A few examples you might find interesting:
Origin of Electrophoresis
Start of Protein electrophoresis
Slab gel electrophoresis: statch, agarose, PAGE, and then blotting
Capillary gel and rapid DNA sequencing and the human genome project
I feel these can make people appreciate better the ideas in modern biological science.