A team of researchers challenged the belief that complex life forms first emerged on Earth 635 million years ago, saying life ...

Most experts believe complex life on Earth can be traced back roughly 635-to-800 million years ago to the Cambrian Period—but some researchers say they now possess evidence that dramatically ...

Precambrian time covers the vast bulk of the Earth's history, starting with the planet's creation about 4.5 billion years ago and ending with the emergence of complex, multicelled life-forms ...

Turns out we might be very wrong about how life arose on Earth. For decades now, the prevailing scientific theory explaining the Precambrian Avalon explosion — in short, the era dating back to ...

Do you know what Precambrian refers to? A unit of geologic time, it corresponds to the earliest part of Earth’s history. It is named so because it extends from about 4.6 billion years ago, the ...