What is the most important scientific question of our time? [more inside]
I don't understand physics. How do atomic orbitals work? [more inside]
Physics-filter: in the context of a diatribe against memorization, a physics professor of mine once mentioned that she fell in love with the discipline because all of modern physics can be derived from a few foundational equations. So, what are they? [more inside]
I remember reading a while back, possibly in Cosmic Trigger or some other such book, that the pyramid shape is naturally conducive to the sharpening of blades. According to this source, if you put dull blades inside a pyramid-shaped object, they will naturally sharpen over time. I don't think it matters what material the pyramid is made from, or how big it is. Anyway, as implausible as this idea seems, I know that I've heard it at least a few times, and cannot find anything about it on Snopes. So my question to the MeFi Mythbusters- real or urban legend?