CLEVELAND (March 27, 2025) – Celebrate the “ship that built Cleveland” and explore the past, present and future of Great Lakes freighters when Great Lakes Science Center debuts Steam and Steel: Propelling the Future of the Great Lakes on Friday, May 23. The new special exhibit is the centerpiece of a summer Centennial celebration of the Science Center’s historic Steamship William G. Mather, which launched 100 years ago on May 23, 1925.