What lifeforms existed in the Precambrian time?

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 almost four billion years later. What Was Happening on Earth at This Time. read more

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 almost four billion years later. read more

These guys: They're called the Edicarian biota. Not much is known about them. They're called biota because nobody's is really sure whether they were animals or plnats or something else entirely. read more

Precambrian time: Precambrian time, period of time extending from about 4.6 billion years ago (the point at which Earth began to form) to the beginning of the Cambrian Period, approximately 541 million years ago. The Precambrian represents more than 80 percent of the total geologic record. read more