Precambrian time covers the vast bulk of ... 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 ...

the researchers have struggled with the lack of evidence of ecdysozoan ancestors in the fossil record, despite molecular evidence suggesting they should exist in the Precambrian. The new study ...

At a time when other paleontologists were convinced that the fossil record could best be explained by directed variation, Simpson disagreed. He said that fossil patterns needed no mystical or goal ...

In fact, before some fossil discoveries were ... Hadean Era (4,550-3,850 mya) The Precambrian's oldest era, the Hadean, predates most of the geologic record. During the Hadean, the solar system ...

During the Precambrian-Cambrian transition ... The study underscores the importance of the fossil record in understanding ...

A study published in August 2024 in the journal Precambrian Research detailed how formations in rock samples, thought to be fossils, suggest that the conditions required for life appeared much ...

An analysis of a 30,000-year-old fossil vulture from Central Italy has revealed for the first time that volcanic rock can preserve microscopic details in feathers -- the first ever record of such ...