The Proterozoic Eon, spanning from 2,500 million to 539 million years ago, marked a transformative chapter in Earth's history. Often overshadowed by the more data-rich Phanerozoic Eon, this period ...

Advanced tools and expanded fossil datasets have painted a clearer picture of the eukaryotic diversity of the Proterozoic eon ...

A single enzyme found in early single-cell life forms could explain why oxygen levels in the atmosphere remained low for two billion years during the Proterozoic eon, preventing life colonizing land.

Land rising above the sea 2.4 billion years ago changed planet Earth ... archaea and bacteria, thrived in water, to the Proterozoic Eon, when eukaryotes, such as algae, plants and fungi, ...

Right between those active mountain-forming eras, crustal thickness plummeted through the Proterozoic eon (2.5 billion to 0.5 billion years ago), reaching a low during Earth's "middle age." The ...

Advanced tools and expanded fossil datasets have painted a clearer picture of the eukaryotic diversity of the Proterozoic eon, which has been hard to quantify. The findings show that Earth's ...

Mountain-Building Stalled for Nearly an Eon During Earth’s Most Boring Period. New research suggests that virtually no new mountains were created during the Proterozoic era, halting the evolution of ...

1. Archean-Proterozoic. You should be able to: describe the differences between Archean and Proterozoic rocks, and what they tell us about changes in plate tectonic processes; use what you know about ...

From the hellish conditions of the Hadean eon, ... During the Proterozoic eon, ... U.S. Strategic Command and Russia's Strategic Missile Forces want to be able to use their vulnerable land-based ...

More than an eon ago, the sun shone dimmer than it does today, but the Earth stayed warm due to a strong greenhouse gas effect, geoscience theory holds. Astronomer Carl Sagan coined this "the ...