Calendar: June 28-July 4
Wednesday, June 29
FEARSOME OR FRIENDLY?
Come face to face with the world's most infamous fish at a free screening of a new
SCIENCE OF THE SCOOP
Who knew that sculpting ice cream into a hot-dog shape and plopping it into a sponge-cake bun would count as science? After five mouthwatering years of formulating hypotheses about ice cream, cake, and chocolate, inventor Peter Franklin finally came up with the recipe for COOL DOGS. He'll be on hand today to explain the chemistry and properties of his ingredients, the special equipment he designed, and the scientific method's place in the kitchen. Free samples will be available for taste tests. ''COOL DOGS," The Discovery Museums, 177 Main St., Acton. At 10 a.m. Free with admission. For more information, call 978-264-4200.
REPLACEMENT PARTS
Farmers already breed livestock to yield the tastiest steak or the best barbecue, so why not breed pigs with human hearts or sheep with human livers for transplantation? In ''The Xeno Chronicles," G. Wayne Miller tells the story of xenotransplantation, or cross-species transplants. This afternoon, Miller is joined by Dr. David Sachs, head of the Transplantation Biology Research Center at Massachusetts General Hospital, to discuss the ongoing quest to create animals that could shorten the human transplant wait list and decrease problems with immune rejection. Borders, 10 School St., Street, Boston. At noon. Free. Call 617-557-7188 for more information.
Friday, July 1
SURVIVING WORSE WINTERS
And you thought winters were rough in Boston. To survive on the edge of the Arctic Circle in Alaska, animals don't just gripe about the weather, they actually undergo physiological changes. Take a break from the summer's sweltering heat to learn about freeze-tolerant frogs, ''supercooling" insects, and the biochemistry of hibernation with an Alaskan scientist working to uncover the genetic assets that keep these animals alive in harsh condi-tions. ''Overwintering in the Arctic: Animal Strategies for Surviving the Long, Cold, and Dark," Marine Biological Laboratory, Lillie Auditorium, Marine Biological Laboratory Street, Woods Hole. At 8 p.m. Free. Call 508-289-7725 for information.
Sunday, July 3
PULSE OF THE PLANET
Earthquakes, volcanoes, lightning, and fire made Earth what it is, sculpting the oceans, the continents, and sparking life itself. Today, the tectonic drama goes largely unnoticed until a dramatic event like the Dec. 26 tsunami in Indonesia, or the recent landslide in California provide sobering reminders of the planet pulsing beneath our feet. Tonight, a new episode of ''Forces of the Wild" will show how scientists put these powerful forces under the microscope, to better understand how they are shaping the Earth. ''Playing With Fire," WGBH-TV (Channel 2), at 8 p.m.
Event notices may be sent to healthscience@globe.com. 
