Habitat Healers will meet again at Crossroads at Big Creek on May 7 to continue their land-restoration efforts. Volunteers of all ages are invited to help every Saturday, 9:30-11:30 am. Instruction, equipment, gloves, cookies and lemonade will be provided. Wear clothing that can get dirty and wet.

Saturday Science will also meet May 7, 2 pm, with a focus on all things trees. This weekly program is designed for school-aged children, but all are welcome. Participants will go outside, weather permitting. Meet in the Collins Learning Center’s lab.

The public is invited to the monthly meeting of the Door Peninsula Astronomical Society on May 10, 7 pm, when the program will be  “Learning with Lasers.” Speaker Tom Minahan will discuss light waves, diffraction in astronomy, refraction and quantum physics. Meet at the Stonecipher Astronomy Center, 2200 Utah St. in Sturgeon Bay.

Learn more about Crossroads at Big Creek, 2041 Michigan St. in Sturgeon Bay, at