Can you connect a mic to a bass amp?

I love my SM-57. Its got a huge range and is totally the best universal mic that can get anything from an amp to a snare to vocals. Unless you really need high end gear for really serious recording, I'd go with a versitile mic. I imagine though if you're asking on here, you are not doing something so serious to drop a few grand on a ultra high end (low end :) ) mic.