Witten doesn't ring a bell with me. Googling the name might mean Edward Witten and Tarynn Madysyn Witten. Do you mean either or them or someone else?
I mean Edward Witten, one of the most prominent physicists alive. The fact that his name does not ring a bell is precisely my point. The names that do ring a bell are the names of folks who are "good at the media," not necessarily folks who are the best in their field.
If it's worth saying, but not worth its own post (even in Discussion), then it goes here.