Ancient microbe fossils show earliest evidence of shell making
809-million-year-old eukaryotes turned calcium phosphate into armor
![microbe fossils](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2016/09/092716_ts_first-shells_free.jpg?fit=860%2C460&ssl=1)
SHELL GAME Roughly 809-million-year-old microbe fossils, such as this one found in Canada, may be the oldest evidence of organisms creating minerals for protection against predators. The shells take many shapes, including this honeycomb pattern.
P. Cohen