In celebration of its 40-year anniversary, the Haines Sheldon Museum will resume its “Brown Bag Lunch” lecture series this Friday, Jan. 10, with a presentation by museum director Helen Alten titled “The Science of Snow.”

“I intend to talk about how crystals form differently at different temperatures and what that impact might be,” Alten said.

The talks will continue every other Friday through April, and feature a local speaker on relevant community topics, according to museum assistant Niall Hackett. Other upcoming topics will include beekeeping, jewelry making, heart health and good eyesight.

On the docket for later this month is Mark Cozzi, who will discuss “Fun Food and Staying Alive in Alaska” on Jan 24.

Cozzi, who’s lived in Haines for 18 years, said he intends to share personal anecdotes and tips on how to make a fire, get fresh water, and find your direction in the wilderness.

The talks are free and held from noon to 1 p.m. in the museum’s upstairs gallery. Residents are encouraged to bring their own lunches.