Meet Mark Siddall-a leech expert by profession and a culinary adventurer on the side. He is one of the scientists that we are profiling on "The Secret Life of Scientists," a web-exclusive series from NOVA. Every two weeks on our website, pbs.org/nova/secretlife, you'll have a chance to meet a new scientist or engineer. Watch their collection of short videos. Ask them questions. Find out how their surprising secret lives fuel their science, and vice versa.

"The Secret Life of Scientists" is produced for NOVA by Seftel Productions. Visit pbs.org/nova/secretlife.

Exclusive funding for "The Secret Life of Scientists" provided by the Alfred P. Sloan Foundation to enhance pubic understanding of science and technology and to portray the lives of men and women engaged in scientific and technological pursuit.