Sentences with phrase «complex multicellular creatures»
Although life seems to have only taken 500 million years to arise on Earth, the move from simple bacteria to complex multicellular creatures took another 2.5 billion years, and technological intelligence has appeared on this planet only once.
https://www.scientificamerican.com/ Not exact matches
Although the oldest animal fossils date back 544 million years, most evolutionists agree that complex, multicellular creatures probably appeared at least 150 million years earlier than that.