Via The Canadian Press:
Cohen was awestruck when she first looked through a high-powered electron microscope at a rock sample hammered out of the wilderness of the Yukon.
What she saw was 800 million-year-old fossilized evidence that organisms were trying to protect themselves by forming their own shield-like plates.
It is the oldest evidence ever of biomineralization, the use of minerals by a living thing to form a hard shell, similar to the way clams or lobsters form their own protection. The tiny fossils date back between 717 and 812 million years....
