BAR HARBOR — The topic of the MDI Science Café from 5-6 p.m. on Monday, April 12 will be “A Conceptual History of Animal Regeneration: From Imagining & ‘Knowing’ to Thinking & Experimenting,” presented by Chuck Dinsmore, Ph.D. The program is free and is offered over Zoom. Regenerative biology and medicine have become the focus of global efforts at elucidating mechanisms underlying the fundamental processes by which regeneration unfolds.