The Cambridge Science Festival will be back, in-person, October 6-9 at the Kendall/MIT Open Space (292 Main Street, Cambridge), with a different emphasis each day. Admission is free.

• October 6: Science + Climate — dedicated to all things environmental, renewable, and sustainable
• October 7: Science + Food — the latest in edible chemistry, at a “farmer’s market of the future”
• October 8: Science + Fashion — runway shows, exhibitions, discussion and interaction with designers, makers, engineers, brands, artisans, influencers and the public
• October 9: Science + Carnival — a family-friendly, science-themed, Great American Carnival, noon-4PM featuring a Main Stage, Midway, Side Shows, Walk-abouts, with “competitions and challenges, interactive engineering and hands-on experiments, design workshops and demonstrations, from telescopes to microscopes, from celestial bodies to synthetic bodies, lasers, DNA, the brain, from marine biology to biological machines, from circuit-boards to circus-shows… and very many robots!”