Abiogenesis: Closer To Understand It

"Diverse microbial life existed on Earth at least 3.75 billion years ago, suggests a new study led by UCL researchers that challenges the conventional view of when life began. 

"For the study, published in Science Advances, the research team analyzed a fist-sized rock from Quebec, Canada, estimated to be between 3.75 and 4.28 billion years old. In an earlier Nature paper*, the team found tiny filaments, knobs, and tubes in the rock which appeared to have been made by bacteria. 

"However, not all scientists agreed that these structures – dating about 300 million years earlier than what is more commonly accepted as the first sign of ancient life – were of biological origin. 

"Now, after extensive further analysis of the rock, the team has discovered a much larger and more complex structure – a stem with parallel branches on one side that is nearly a centimeter long – as well as hundreds of deformed spheres, or ellipsoids, alongside the tubes and filaments." (link)