Cambridge Police report officers found two spent shell casings at the park entrance at York and Hamlin streets after somebody called about gunfire just before 3:30 a.m. Read more.

People will be running around Cambridgeport Saturday morning while pushing, pulling or pedaling homemade sculptures, including:

Dizzy, the kinetic bird-batting cat built by teens; a square-wheeled sailboat made by Harvard students; a tiny wheeled creature that audibly interacts with audiences; a 23' giant fish; and a boat with flapping wings.

People's Sculpture Racing starts at 11 a.m. at the south corner of University Park Commons.

Cambridge Day reports what started out as a quiet update by the principals of the city's upper-grade schools to the School Committee escalated quickly when one of the principals finished a prepared report, then launched into an attack on both the School Committee and the parents he said had constantly tried to undercut him by always running to the School Committee.

Martin Luther King Jr. School on Putnam Street. Photo by Juan Carmona.

Jackie Geilfuss looked down from her Kendall Square office around 11 a.m. to see a car turned turtle on Broadway.

Cambridge Police report: Read more.

Cambridge Police say there won't be anything to be alarmed about on Saturday when you see large clouds of steam erupting out of the Veolia power plant in Kendall Square on Saturday.

Veolia Energy will be conducting a procedure known as steam blowing Saturday, May 30, between 8:00am-6:00pm. ... This operation involves flowing steam through a pipe for the purpose of pipe cleaning. The cleaning will result in large clouds of steam, which may cause curiosity and/or phone calls from the general public.

The Harvard Gazette tells the story of some of the church bells across Cambridge that will be rung this morning after Harvard commencement.

The bells will begin to ring at 11:30 a.m., just after the sheriff of Middlesex County declares the Commencement Exercises adjourned. They will ring for approximately 15 minutes.

Thanks to Kevin Church for discovering this charming exchange of ideas on a Cambridge street: Read more.

The Globe reports the people who work in and around Kendall Square are fed up with sitting in traffic. Sure, there's talk of more buses and better switches on the Red Line, but then there's Robert A. Weinberg, director of the Weinberg Laboratory of Cancer Biology at Whitehead Institute: Read more.