Many major groups of animals that have become a mainstay in modern times first appeared during the Cambrian Explosion.

The Cambrian Explosion is a landmark moment in the history of life on Earth when many of the major groups of animals first ...

During the Ediacaran period, about 635 million to 541 million years ago, oxygen was sparse, the oceans were murky and marine organisms ate by absorbing nutrients floating around in the water.

Quaestio lived some 555 million years ago in the so-called Ediacaran Period, a key time in the history of life when complex, multicellular life first evolved.

Researchers from the Australian National University (ANU) analyzed ancient fossils from the Ediacaran period following their discovery in Russia in 2018. The findings were published in the journal ...

Stromatoveris psygmoglena hails from the Cambrian period, but dozens of similar blob-like fossil imprints have been found among older strata -- rocks from the Ediacaran period, which lasted from ...

The Ediacaran Period was a time of dramatic change for the planet, when the climate was warming after two glacial events and life was evolving from single-celled and microscopic organisms. A ...

“But in the Ediacaran, we had a fascinating period in the development of the deep Earth when processes creating the magnetic field … had become so inefficient after billions of years, that the ...

Animal remains, however, don't appear in the fossil record until 600 million years ago during the Ediacaran period, though there are indirect signs that animal life may have gotten started much ...