The Cambridge Science Festival is the national leader in its field, with over 160 activities and events spanning 10 days, April 14-23.  You can filter this year’s online schedule of events by date or by age (family/teens/adults) — and browse the list of recurring programs and events, Museum of Science activities and exhibits, and week-long youth workshops. Some events require pre-registration or tickets, and most are free, including:

• The opening-night symposium on April 14, 7:30-9:30PM at Harvard’s Sanders Theater:  Are We Alone? Exploring the Possibility of OTher Intelligent Life in the Universe
• The Science Carnival and Robot Zoo on Saturday, April 15, 12-4PM at the Cambridge Public Library and Rindge & Latin High School

It’s too much to keep in your head.  You can print out the 30-page program (PDF) or use the guidebook app for your iPhone or Android device.