Scientists Discover Traces of Proto-Earth Hidden Deep Within Ancient Rocks MIT Team Uncovers 4.5 Billion Year Old Clues to Earth's Primordial Origins Scientists from MIT and collaborating institutions have uncovered extraordinarily are traces of "proto-Earth," dating back around 4.5 billion years — before a monumental collision reshaped the young planet and gave rise to the Earth we know today. Their findings, published in Nature Geoscience , offer vital clues to the primordial materials that built the early Earth and the wider solar system. Billions of years ago, our solar system existed as a vast, swirling disc of gas and dust. Over time, this matter coalesced into primitive meteorites, which gradually merged to create proto-Earth and its neighbouring planets. During this early phase, Earth was likely a molten, lava-covered world. Less than 100 million years later, a Mars-sized body struck the young planet in a colossal "giant impact," melting its interior a...
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