The cyanobacteria have an extensive fossil record. The oldest known fossils, in fact, are cyanobacteria from Archaean rocks of western Australia, dated 3.5 billion years old.This may be somewhat surprising, since the oldest rocks are only a little older: 3.8 billion years old!he cyanobacteria have an extensive fossil record. The oldest known fossils, in fact, are cyanobacteria from Archaean rocks of western Australia, dated 3.5 billion years old.
A Seraph Weapon. Seraph (sometimes referred to as pink) is an item rarity first released with Captain Scarlett and Her Pirate's Booty. Seraph items are between unique and legendary items, with impressive stats but with some form of drawback such as low accuracy or projectile speed. Seraph items are obtained.
The sentinel lymph node is the hypothetical first lymph node or group of nodes draining a cancer. In case of established cancerous dissemination it is postulated that the sentinel lymph node/s is/are the target organs primarily reached by metastasizing cancer cells from the tumor. Thus, sentinel lymph nodes can be totally void of cancer because they were detected prior to dissemination.