<p>We ask Pascal Cotte, an engineer who specializes in light, how his multi-spectral camera has unveiled Leonardo's methods when painting the famous Mona Lisa.</p>

What's the Difference Between a Turtle and a Tortoise?

We hear amazing questions in the exhibit halls of the Museum of Science, Boston. Do woodpeckers get headaches? How many colors are in the rainbow? Who gets to drive the Mars rovers? Pulsar features short interviews with our education staff along with scientists, engineers, and experts from around the world in order to find the answers.