来自MSN1 年
Researchers uncover source rocks of the first real continents
A major hurdle in understanding how the continents formed during the Archean Eon (4 billion to 2.5 billion years ago) has been identifying the building blocks of Earth's early crust. Much of the ...
Nature3 年
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 ...