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 severe ...

A study suggests that around 1 billion years ago, photosynthetic primary producers were likely too small to support the development of animal ecosystems. Approximately between 1.8 and 0.8 billion ...

Laughing gas and the mystery of Carl Sagan's Faint Young Sun Paradox: When the sun shone dimmer an eon ago, Earth remained warm in spite of it likely thanks to a mix of greenhouse gases.

Charnockite formation in the Angul district of Orissa took place between 1088 + 26/- 17 Ma, the U-Pb zircon upper intercept crystallization age of a leptynite neosome, and $957 + 8/ - 4-956 \pm 4$ Ma, ...

Fossilized skeletons and shells clearly show how evolution and extinction unfolded over the past half a billion years, but a new analysis extends the chart of life to nearly 2 billion years ago. The ...

The Journal of Geology, Vol. 112, No. 3 (May 2004), pp. 305-315 (11 pages) Abstract The ages of more than 200 detrital zircons from two Proterozoic quartzites (the Baraboo and Hamilton Mounds ...

If all the world's a stage and all the species merely players, then their exits and entrances can be found in the rock record. Fossilized skeletons and shells clearly show how evolution and extinction ...

(CN) — More than a billion years ago, tectonic activity on Earth may have stopped so completely that no new mountains could be formed on the planet for an entire eon — putting evolution of life on ...