Initially, I was so stunned by the influx of photos that I posted just about anything that came my way. But as the emporium has grown, I’ve become choosier about which ones I post. So if you are considering sending in your own scientific ink, please read these guidelines:

1. I’m most interested in tatoos that tell a story. The most interesting stories are the ones about how people became scientists. I love this one, for example.

2. When you send in pictures, please include a paragraph in which you tell me who you are and explain the significance of the tattoo. I prefer people to tell the story of their tattoo in their own words.

3. If you’ve been so