Hi,
Go to the curriculum guide and click on History. Then click on one of the modules ‘details.’ I just browsed through and I think that the module which includes the rennaissance (spelling?) has the most scientist’s bios. Sonya also typed up a list of Sower Series bios (not all scientists, but quite a few)by time period which you can see in the post below that is titled “Selections for all ages.” There are other biographies to be had, of course; these were just some suggestions.
Blessings,
Cindy