Free Admission Wednesday at The California Science Center - see INFO below. The Science Center is open to the public seven days a week, 362 days per year, with free general admission to its permanent exhibit galleries. The facility, which opened in February 1998, spans more than 400,000 sq. feet and includes four major exhibit areas. World of Life probes the commonalities of the living world, from the single-celled bacterium to the 100-trillion-celled human being; Creative World examines the ways people employ technology to meet their needs for transportation, communication and structures; and Ecosystems, a major expansion opened in March of 2010, features an unprecedented blend of nearly 400 species of live plants and animals, and hands-on exhibits in 11 immersive environments. Ecosystems highlights include a 188,000 gallon kelp tank populated with live kelp, fish, and other marine life, a desert flash flood, and a special gallery dedicated to the urban ecology of Los Angeles. The Ecosystems experience empowers explorers with the science knowledge to become better stewards of the environment. Additionally, World of Life, Creative World, and Ecosystems each have a Discovery Room intended for children 7 years of age and younger. These specially designed spaces make science more approachable for young learners by focusing on hands-on learning experiences. More Info below.