For billions of years after the origin of life, the only living things on Earth were tiny, primitive cells resembling today’s bacteria. But then, more than 1.5 billion years ago, something remarkable ...

For billions of years after the origin of life, the only living things on Earth were tiny, primitive cells resembling today’s bacteria. But then, more than 1.5 billion years ago, something remarkable ...

Molecules found in 1.6-billion-year-old Australian rocks are believed to be remnants of a “lost world” of ancient organisms that comprised the earliest complex life. “We say they are a lost world, ...