Letters

The eyes have it
Just finished the latest issue of your spectacular magazine. I’ve been a reader for many years, but this is the first time I’ve felt compelled to write in. In the article about the tadpole (“Tiny voltage grows eyes in strange places,” SN: 12/31/11, p. 5), the final sentence is a quote from Coffman: “The fact that a narrow range of voltage is enough to specify an eye is kind of amazing.”