> what if physics didn't allow transistors?" Yes, because technology is discovered more than invented, this is a more interesting question. What are some other

> what if physics didn't allow transistors?" Yes, because technology is discovered more than invented, this is a more interesting question. What are some others? What if biology didn't allow anesthetics? Or antibiotics? What if geology hadn't split up Pangea? Is there life because of a hospitable environment, or does a hospitable environment exist because of life? Just a quick list. I'm sure readers can add.