On Tuesday, June 20 and on Wednesday, June 21, outboard motor historian Larry Stevenson will present two talks exploring major innovations in outboard motor design in the early 20th century.

For one night only this summer, Darrows Barn at Round Top Farm in Damariscotta will be transformed into a celebration of all things Thai in honor of a local organization that helps young women from Northern Thailand escape the threat of human trafficking.

Pemaquid Watershed Association will host a grand opening celebration at Pemaquid Pond Preserve in Bremen, one of its newest nature preserves, on Saturday, June 10 from 11 a.m. to noon.

Ferns are among the most diverse plants to be found adorning the forest floor in midsummer. They occupy a wide range of substrates from rock ledges and glacial erratics, where polypody ferns thrive, to wetlands with their fiddleheads of ostrich ferns and dry areas with abundant bracken ferns, to bogs and marshes sporting tall cinnamon and royal ferns.

The Lincoln County Fish and Game Association and Medomak Valley Land Trust will host the annual Youth Spring Fishing Day at the Waldoboro Quarry on Depot Street in Waldoboro on Saturday, May 27 from 8 a.m. to 1 p.m.

On Friday, May 26 at 4 p.m., Lincoln Academy in Newcastle will dedicate its new John Bowers Baseball Field. John Bowers was a Lincoln Academy graduate in the Class of 1975 who was an avid baseball player. He served on the Lincoln Academy Board of Trustees for many years before passing away in 2011.

A historic photography exhibit titled “Lincoln County Through Eastern’s Eye” will be on display at Boothbay Railway Village May 27-June 29. A related illustrated talk by Penobscot Marine Museum photo archivist Kevin Johnson will take place at 7 p.m. on Tuesday, June 6 at the same location; admission to the talk is free, with a suggested $5 donation.