Oct. 8 & 15 (different times). Adults & teens invited to learn woodcarving basics, then carve a small pumpkin to take home. 5:30–7:30 p.m. (Oct. 8) & 2–4 p.m. (Oct. 15), AADL Downtown, Secret Lab. Free. (734) 327–4200.  

Every Thurs., Sat., & Mon. (different AARC locations). Runners of all abilities invited to join a 5K mapped route (Thurs. & Mon.) or either a beginner or advanced group run (Sat.). AARC Colonnade (6 p.m. Thurs.), 2621 Plymouth Rd.; AARC Traver Village (7 a.m. Sat.), 901 W. Eisenhower; and Corner Brewery (6 p.m. Mon.), 720 Norris, Ypsi. Free. annarborrunningcompany.com.  

Every Sat. All invited to join a timed but noncompetitive 5K run/walk. 9 a.m., Lillie Park South, 4365 Platt. Free, but first-timers are requested to preregister at parkrun.us/lillie and arrive at 8:45 a.m. [email protected]. 

Every Sat. Moderate-paced ride, 20 miles or more, to Dexter and beyond. Pack something to eat or stop in Dexter or Chelsea for coffee or breakfast. Note: Riders should be prepared to take care of themselves on all AABTS rides. Carry a water bottle, a spare tire or tube, a pump, a cell phone, and snacks. See aabts.org for weather cancellations or delays. 9 a.m. sharp, meet at Barton Nature Area parking lot, W. Huron River Dr. near Bird. Free. (734) 649–9762, [email protected].

Every Fri., Sat., & Wed. All invited to play one of 200 songs, with melodies transcribed in numbers, on the 17-bell chime’s numbered keys. Ambitious players can add chords. Kids welcome. noon–12:30 p.m. (Fri. & Wed.) & 10:30–11 a.m. (Sat.). Free. [email protected].   

Oct. 3, 17, & 31. A popular series of talks aimed at general audiences by U-M and visiting scholars.

Oct. 3: “Do People Really Believe That? The Science of Survey Research.” U-M communication professor Yanna Krupnikov discusses how seemingly small survey design decisions can have big consequences when measuring public opinion.

Oct. 17: “Dark Matter, Dark Energy, and Einstein’s Cosmological Constant.” Kansas State University physics professor Bharat Ratra discusses the astronomical data that persuades cosmologists that dark matter and the as-yet-undetected dark energy are by far the main components of the universe.

Oct. 31: “Spooky, Spectacular Halloween Demo Show.” Family-friendly Halloween-themed physics demonstrations by U-M physics faculty.

10:30 a.m., 170 Weiser Hall, 500 Church St. Also via livestream; see bit.ly/saturdayphysics. Free. (734) 764–4437.

Every Sat., except Oct. 3 (different times). Hour-long docent-led tours exploring “Magic in the Ancient World” (Oct. 10, 11:15 a.m.), “Egyptian Gods and Animals” (Oct. 10, 2 p.m.), “Egypt 101” (Oct. 17, 11:15 a.m.), “Spooky, Weird, and Magical: Halloween with the Kelsey” (Oct. 24, 2 p.m.), and “Dangers Lurking Around Every Corner” (Oct. 31, 2 p.m.), a look at artifacts that people in ancient Egypt, Mesopotamia, and Rome believed could help protect them from various diseases and dangers. Various times, 434 S. State. Free. (734) 764–9304.