Fossils of the largest known among them ... is not unlike one of the first life forms that appeared in the Precambrian era. Photograph by Joel Sartore, National Geographic Photo Ark The earliest ...

More extensive Precambrian finds ... acritarchs and the Ediacaran animals vanish from the fossil record at the end of the Vendian, the period that closes the Proterozoic era.

However, the fossil found, which would be a 555-million-year-old worm, would represent the oldest member of the aforementioned superphylum and the only one from the Precambrian period The fossil ...

the supercontinents of Gondwana 2 and Nuna (Columbia), as well as the geology of the Precambrian era. Earth scientists in the department also closely monitor global issues, such as energy security.

But a UC Riverside-led team has now identified the oldest known ecdysozoan in the fossil record and the only one from the Precambrian period. Their discovery of Uncus dzaugisi, a worm-like ...

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