Earth at 3 billion-years.

3 billion-year-old Earth had water everywhere, but not one continent, study suggests

By Mindy Weisberger - Senior Writer 3 hours ago

Chemicals in rocks hinted at a world without continents.

What did Earth look like 3.2 billion years ago? New evidence suggests the planet was covered by a vast ocean and had no continents at all.

Continents appeared later, as plate tectonics thrust enormous, rocky land masses upward to breach the sea surfaces, scientists recently reported./.../