Precambrian time covers the vast bulk ... The earliest living organisms were microscopic bacteria, which show up in the fossil record as early as 3.4 billion years ago. As their numbers multiplied ...

A groundbreaking fossil which is estimated to be 555 million years old has shed light on one of the biggest mysteries in evolution - the origins of Ecdysozoa, which includes insects, crustaceans ...

SYDNEY, April 4 (Xinhua) -- A research team constructed a detailed evolutionary timeline of bacteria ... had been challenging due to incomplete fossil evidence, said Professor Phil Hugenholtz ...

Professor Phil Hugenholtz from UQ's School of Chemistry and Molecular Biosciences said establishing accurate timescales for how bacteria evolved before, during and after the GOE had been difficult ...