Part philosopher, all scientist, Janna Levin is a professor of physics and astronomy at Barnard College in New York. But her career as a scientist began half-way through college when Levin, a then philosophy major, says she was "struck by how powerful physics and math could be." Levin said she found that the sciences could change people's opinions in a way she didn't think philosophy could.
That's when she changed her focus.
When asked about her research, the "why" of what she does, Janna gives an answer that still rings of a philosopher: "What it does is it changes the way we see ourselves in the world. We realize that there are things out there that have not yet been seen, but can be heard. It gives us a deeper understanding into the universe and maybe even the origins of the universe. And I think that's a pilgrimage human beings have been on ever since they started to look out and wonder about the world.