The 96,631‐square‐foot Ernest E. Tschannen Science Complex at California State University, Sacramento (Sac State), designed by Los Angeles‐based CO Architects, had its ceremonial topping out event recently. The new five‐story, $91.5‐million building will feature a state‐of‐the‐art, energy‐efficient, light‐filled science facility providing teaching and research laboratories for the College of Natural Sciences and Mathematics.