The last one was accused of being "too easy" - although only one person deemed to try and guess it. It's not like it was Darwin easy! So here's another one. A certain type of biologist should know this one as the guy should be a poster in their bedrooms. So here we go;
This one seems to be proving tricky so I'll give you a more recent picture.
It was Gregor Mendel the macdaddy of genetics and an excellent example of how science and religion can co-exist perfectly. Well done "anonymous Vicky", Bask in yor achievement and feel free to improve your CV with it.
I still think he looks like John Diffley (or vice versa)