Comment by aleph_minus_one

> mathematicians or physicists fall into this category of knowing a lot about many thing . Sabine videos for example . she knows everything it seems

Sabine Hossenfelder, for obvious reasons, knows quite a bit about physics, though on some physics topics she has opinions that are outside the mainstream. For other areas, I am rather certain that she has a talent to learn about them up to some shallow level quite fast, which suffices to create some video about the respective topic, and then move on.