Philadelphia Science Festival 2025. The science history institute is a free museum and library that collects, preserves, interprets, and shares the stories behind the science. The philadelphia science festival is an annual event that celebrates the power of science and technology and their impact on everyday life.

“this is our eighth year,” says. As we look forward to the 2025 phs philadelphia flower show, the theme, gardens of tomorrow, invites you on a journey into the future of gardening.