
Diverse life forms existed on Earth at least 3.75 billion years ago, much earlier than previously thought, a new study suggests.
Researchers analysed a fist-sized rock from Quebec, Canada, estimated to be between 3.75 and 4.28 billion years old.

Diverse life forms existed on Earth at least 3.75 billion years ago, much earlier than previously thought, a new study suggests.
Researchers analysed a fist-sized rock from Quebec, Canada, estimated to be between 3.75 and 4.28 billion years old.