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 ...

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 ...

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 ...

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.

It dates to around 570 million years ago, and it sparked a revolution of our understanding of Precambrian life. Before ... They were bound to the sea floor via a holdfast and didn’t move around.

Following the Precambrian, the world entered into what is known as the Paleozoic Era, a geological period that lasted nearly 300 million years.During this time, the diversity of marine life on the ...