Ask HN: Why are physics and math majors omnipresent in diverse research domains?

When I search grad student profiles in CS and financial research groups, I often find that there are students who did their undergrads or even masters in mathematics or physics.

Although they are in minority among a huge number of CS grads, but that is not the point. I don't find that many biology or chemistry majors being everywhere in such an interdisciplinary manner.

What makes physics and math graduates so strong to work in wide variety of domains? What is the skillset they possess?