Thomas Laakso, Andrew H. Knoll, and colleagues calculated the amount of phosphorus sedimentary rocks deposited toward the end of the Proterozoic Eon and early Phanerozoic Eon.

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 ...

The first was the Neoproterozoic or the “great” oxygenation event which brought oxygen to Earth’s ... The search for animal fossils from the Proterozoic eon is hampered by uncertainty about ...

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 ...

With this new study, the chart of life now includes life forms from the Proterozoic Eon, 2,500 million to 539 million years ago. Proterozoic life was generally smaller and squishier ...

Together, the data provides further evidence that Earth's oxygen increased in a stepwise fashion, as opposed to being constrained to two major events capping the Proterozoic (a geological epoch ...

Seldom during this long history have the dance's tempo and the dramatic heights of the jeté leaps exceeded those that occurred near the end of the Proterozoic eon, which spanned the time from 2.5 ...

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 ...

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 ...

In 1998, Shuhai Xiao and colleagues reported finding thousands of 600 million year old embryo microfossils in the Neoproterozoic Doushantuo Formation, a fossil site near Weng'an, South China. But ...