On Being the Right Size (1926) (irl.cs.ucla.edu)

HTML version: http://irl.cs.ucla.edu/papers/right-size.html

Interesting earlier discussion of the same article here under a different URL: https://news.ycombinator.com/item?id=6545132

And here's another link that includes the same article as well as many others: http://www.arvindguptatoys.com/arvindgupta/rightsize.pdf

This is a classic work, and well worth reading. It puts the lie to the common statements that "if an ant were as big as a man, it could lift incredible loads!" If an ant were as big as a man, it would collapse under its own weight.