A pink sponge, photographed at an aquarium today, is not unlike one of the first life forms that appeared in the Precambrian era ... which included sea anemones, corals, and jellyfish, had ...

In a study published in Precambrian Research Monday by scientists from Cardiff University in Wales, researchers found environmental evidence that complex life existed 1.5 billion years earlier ...

The Precambrian eon is vast ... and various asteroids -- forms from interstellar gas and dust. Prelude to life (4,550-3,900 mya) Planet Earth is very hot at its formation. As it cools and its ...

As underwater chimneys called deep-sea vents release dissolved ... suggest complex multicellular life evolved as far back as 900 mya. More extensive Precambrian finds, particularly those ...