Yes! Manhole Covers are Round because Sewers are Cylindrical!

Image via Wikipedia I swear this was my answer the first time I heard the question: Round Manhole Covers, or: If Richard Feynman applied for a job at Microsoft :: hebig.org/blog Q: Why are manhole covers round? A: We have to look at what is under the cover to answer that question. The hole below the cover is round [...]