Before I get blasted by anyone, I just wanted to say that I'm asking this as a matter of curiosity and am in no way suggesting that some people/academic subjects are "better" or "worse" than others. It's strictly an intellectual question for me with no personal meaning or any other type of value attached to it. With that said, I'm curious if there's some kind of hierarchy of difficulty within the sciences? For example, I'll sometimes hear (again, nothing personal here, but just speaking non-judgmentally and as a matter of fact) that biology is one of the "easier" sciences, while math and physics are considered the hardest. Of course, this seems relative to the person and not necessarily inherent in the sciences themselves. But, nevertheless, the general view I get is that sciences like geology, biology, oceanography, etc. are comparatively easier than ones like engineering, mathematics, physics, etc. First, are these opinions quite popular in your own circles? And, if so, what seems to be the reasoning behind them? In other words, why is math considered harder than biology and so on? What characteristics of it make for a more difficult subject? Hopefully no one takes offense to this question. It's just one of those things I hear a lot and have actually wondered about myself. I don't have a ton of science experience, but I do sometimes sit back and wonder if one is just harder than another for me and why that is.