Hosted on MSN2mon
Geologists Found Remnants Of Earth's Mantle That Have Lasted Over 2.5 Billion Years And Challenge Previous Beliefs About Our Planet's Oxidation Processes
That means something must have changed between now and the Archean Eon, which was over 2.5 billion years ago. Experts have proposed that changes in Earth's oxygen may have led to the shift.
Nature3y
Earth's Earliest Climate
This paper will take you as far back in the climate record as is currently possible, to the Archean Eon, from 3.9 to 2.5 billion years ago (Bya) (Figure 1). Peering so deeply back in time ...
Nature3y
Major events in the evolution of amino acid synthesis
The Hadean eon represents the time from which Earth first formed. The subsequent Archean eon (approximately 3,500 million years ago) is known as the age of bacteria and archaea. The Proterozoic ...
Felix3d
Earth’s oldest fossil
In 1993 Schopf published a paper about some microfossils he had found in Early Archaean rocks, which he claimed were the ...