What was Sara Sidle's college major at Harvard?

Sara Sidle majored in physics at Harvard University.

The character’s scientific training helps explain her role as a materials and element analyst in the Las Vegas crime lab. Physics gives Sara a foundation for understanding forces, motion, energy, matter, and the behavior of materials—knowledge that fits the show’s emphasis on evidence-based reconstruction.

Sara’s academic background is part of a broader education story. She attended Harvard before continuing her studies at the University of California, Berkeley. Before joining Gil Grissom’s team in Las Vegas, she worked in San Francisco and developed experience connected to forensic investigation.

Viewers sometimes confuse her major with chemistry because CSI frequently features chemical testing, trace evidence, and laboratory analysis. Those are neighboring forensic disciplines, but the character biography identifies physics as Sara’s Harvard major. Her professional specialty is materials and element analysis, not criminology or biology.