A team of researchers challenged the belief that complex life forms first emerged on Earth 635 million years ago, saying life ...

Precambrian time covers the vast bulk of the Earth's history, starting with the planet's creation about 4.5 billion years ago and ending with the emergence of complex, multicelled life-forms ...

Most experts believe complex life on Earth can be traced back roughly 635-to-800 million years ago to the Cambrian Period—but some researchers say they now possess evidence that dramatically ...

The Hunt for Precambrian Life: An Integrated Approach Geological Society of America Annual Meeting: November 2-5, 2003 Seattle, Washington Dear Colleague: ...

Nagoya, Japan -- In the history of life on Earth, a dramatic and revolutionary change in the nature of the sea floor occurred in the early Cambrian (541-485 million years ago): the "agronomic ...

A bizarre, tentacled creature that lived in the deep ocean 560 million years ago may be an ancient relative of modern jellyfish and the earliest known predator in the animal kingdom, analysis of a ...

The longevity of the Precambrian far outstrips the "whole interval of the Cambrian age to the present day", and for at least some of that time the sea did swarm with life.

The riddle of Ediacara (900 mya) Trace fossils of wormlike creatures suggest complex multicellular life evolved as far back as 900 mya. More extensive Precambrian finds, particularly those ...

Earliest Signs of Life on Land Preserved in ca. 3.5 Ga Hot Spring Deposits. Tara Djokic et al. in Nature Communications , Vol. 8, Article No. 15263; May 9, 2017.

The Precambrian eon is vast, almost unimaginably so. In fact, before some fossil discoveries were made late in the 20th century, it was considered unknowable -- evolution's dark ages. The ...