milking this idea for all it's worth

These are two other designs I did, Charles Lyell the geologist and Louis Pasteur, who invented/discovered(?) the process of pasteurization - wahay who knew? Claire: I think the Louis design is just for you, because you are the person that comes to mind when I think of poking bacteria around, and I heard your milkshake isn''t bad either

I have done these in colour to see what they look like that way, and I'm not quite decided which I prefer so any input on this is appreciated. Also if you can think of a better line for Charles Lyell then I challenge you to say it, because I have had people questioning that one. Any further recommendations should be mentioned in the comments and I will do my best to create them. Cheerio!