Scientists have long wondered why Earth's overall makeup doesn't fully match the mix of materials found in ancient meteorites. One hypothesis has been that our proto-Earth (what the earliest stages of ...

Researchers have discovered chemical fingerprints of Earth's earliest incarnation, preserved in ancient mantle rocks. A unique imbalance in potassium isotopes points to remnants of “proto Earth” ...

Before Earth, there was “proto Earth,” a primitive hunk of rock that formed four and a half billion years ago. It was drastically different to the Earth we know today, heaving with lava and rock all ...

Millions of years before blue oceans and wandering continents, the Earth in its early days was a molten, tumultuous planet — a roiling mixture of rock and metal condensing within the nascent solar ...