"Quest," the Emmy Award-winning science series produced by KQED and five public media partners, will celebrate a milestone on Wednesday when it airs its 100th episode (7:30 p.m., Channel 9).

"'Quest' has come a long way since it launched in 2007," says Sue Ellen McCann, who runs KQED's Science Unit. "We have not only earned the highest accolades and awards for our science reporting, but we have also expanded the series to other regions in the U.S., and 'Quest' helped to create the largest science and environment reporting unit in California.

"We are thrilled to achieve this milestone in our science reporting with outstanding contributions from our partner stations."

Over the past seven years, "Quest" has reported on a wide variety of topics, from edible insects, to plans by private companies to launch rockets to the moon. Among the honors collected by the multimedia series are two American Association for the Advancement of Science (AAAs) awards for science journalism; 11 Regional Emmys; six Society of Environmental Journalists national awards; and 12 awards from the Society of Professional Journalists.

Wednesday's 100th episode, "Inventing the Future: Bikes, Bugs and Fashionistas," includes a behind-the-scenes report on a North Carolina inventor who builds sun-powered "carcycles." Also featured: An Ohio engineer transforming flies into fishmeal, and a Nebraska textile engineer working to convert corn husks into fibers for clothing.

Next week's installment includes a San Francisco-based story about new hydrogen-powered cars that only emit water vapor.

This spring's episodes, says "Quest" executive producer Jason Black, will explore "the complex tapestry of biodiversity in America, the essential roles that humans, animals and plants are playing in efforts to slow climate change, and the remarkable innovations being pioneered by scientists and engineers to secure a sustainable future,"

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