Ancient squirrel poop reveals Ice Age secrets; scientists explore body regeneration and mutations

From the frozen burrows of the Yukon to the cellular machinery of the living human body, a recent episode of CBC's Quirks & Quarks traced the long arc of biological discovery — reminding us that life keeps its secrets in unexpected places, from ancient squirrel droppings to the quiet mutations accumulating in our own cells. Scientists are learning to read these hidden records not merely as curiosities, but as maps toward a medicine that works with the grain of life rather than against it. The past, it seems, is not only preserved in ice — it is still shaping what we might become.