Science used to be considered as second philosophy. PhD, the highest title for a scientist, is a Doctor of Philosophy. However, some philosophers opine that philosophy is not science. So, is asking on philosophy on topic here?
Philosophy and History of Philosophy I would consider off topic and is better for Philosophy.SE.
This is because that is still in scope at Philosophy.SE. On the other hand
History of Philosophy of Science and Mathematics should be considered on-topic. This includes meta-mathematics, meta-physics, scientific method etc.