The Broad Institute hosts Midsummer Nights’ Science, an annual lecture series on genomics and medicine that is free and open to the public.  Registration is required.  This year, the following lectures will be offered on Wednesdays, 6-7PM, at 415 Main Street in Kendall Square, Cambridge:

• July 12:  Who we are and how we got here:  Ancient DNA and the new science of the human past.  Sold out.
• July 19:  Pre-malignancies and the prevention of cancer.  Register.
• July 26:  Precision medicine in diabetes.  Register.
• August 9:  Robots vs. disease:  How microscopes are aiding the discovery of new medicines.  Register.

The Newton Free Library will hold its 4th annual STEAM Expo for all ages on Saturday, July 15, 12-3PM.  Last year, over 1,500 attended this free gathering of tech enthusiasts, traditional crafters, artists, musicians, educators, tinkerers, hobbyists, museums, engineers, and students. This year’s Expo will include Blue Star Planetarium, a giant inflatable planetarium in which four different shows will be presented, with space for 25 people for each show.  Sign up at the planetarium 30 minutes before each show.

• 12:15PM:  In My Backyard (Grades K-2)
• 1PM:  Oasis in Space (Grades 3+)
• 1:45PM:  Black Holes: The Other Side of Infinity (Grades 6+)
• 2:30PM  Totality: Lunar and Solar Eclipses (All Ages)

The Newton Free Library will host the following STEM events in June. Except as noted, space for these events is limited, and you must pick up tickets 15 minutes beforehand at the Children’s Desk.

• Tuesdays:  Design Squad, 7PM, Grades 5-7. Registration required; waiting list.
• July 10:  MOS Science Magic, 4-4:30PM, Grades K and up.
• July 13:  Scratch Club, 7-8PM, Grades 3-4.
• July 15:  STEAM Expo, 12-3PM, all ages.
• July 19:  Chemistry and Cake, 4PM, Grades K-2.
• July 20:  KIBO Robots, 4PM, Grades K-1.
• July 31:  Bubbleology, 7-8PM, all ages.

Boston Tech Mom (“a parent’s guide to raising a future techie”) is a great resource for all things STEM around Boston — including her monthly posts about STEM Events for Kids in Boston. Here’s her July list of STEM events, with her list of Girls Who Code clubs.

The Newton Free Library will hold its 4th annual STEAM Expo for all ages on Saturday, July 15, 12-3PM.  Last year, over 1,500 attended, and this year’s Expo is expected to be even bigger. This STEM + Arts Expo is a gathering of tech enthusiasts, traditional crafters, artists, musicians, educators, tinkerers, hobbyists, museums, engineers, and students. This year’s Expo includes a giant inflatable planetarium, LED light-up necklaces, an augmented-reality sandbox, and much, much more.

The Clay Center Amateur Radio Club — a public outreach STEM program of the Dexter Southfield school — will host the Amateur Radio Relay League (ARRL), Field Day on June 24 (3-6PM) and June 25 (9AM-Noon) at the Clay Center Observatory, on the Dexter Southfield campus (20 Newton Street in Brookline; 5th floor).  The ARRL Field Day is the most popular on-the-air operating event in Amateur Radio, involving tens of thousands of amateur radio operators from across the country and lots of public demonstrations.  It’s free and open to the public, and you do not need a radio license to participate. If you’re bringing a group of more than five people, please email Bob Phinney to let him know.

The Clay Center Observatory, on the campus of Dexter Southfield School (20 Newton Street in Brookline; 5th floor), will hold Public Telescope Nights 8PM to 9PM on these Tuesdays:  July 11, 18, 25 and August 1 and 8.  Register in advance.  Events are canceled if weather is rainy or overcast:  Call 617-454-2795 one hour before the event for a recorded message.  The Clay Center offers a range of Outreach Programs for community groups.  Check the Center’s calendar for future events.