Tiny changes can have profound effects on life. Lochlan Krupa, an undergraduate working in the lab of Andrés Bendesky, knows this well. He recently discovered that the duplication of a single gene gave fish a new ability to make a vitamin from their food.

His story is the latest in The Science Life, an illustrated series that explores the cutting edge of neuroscience and the people helping us better understand our minds, brains and behaviors. Read more about his research, published in the journal Genetics.