Len Zon: 30 Second Science

(electricity crackling) (curious instrumental music) - I'm a hematologist oncologist at Children's Hospital, and I take care of children who have blood diseases or cancer.

I work on blood stem cells, and I'm trying to understand how they're made and how to use them in marrow transplantations.

I also work on the zebra fish as a model.

Zebra fish are completely transparent, and you can see all the organs develop, and we're studying human diseases in the zebra fish to try to find new therapies for patients who are getting transplanted for leukemia or lymphoma.

Good?