Both groups of life forms are at least 500 million years old. Using a bigger data set, this group of researchers favors the sponges. But we surely haven’t heard the last of it.
Instead of looking for fossil at that age, the researchers looked for biomarkers: Rather than searching for conventional body fossils, the researchers have been tracking molecular signs of animal life, called biomarkers, as far back as 660-635 million years ago during the Neoproterozoic Era. In ancient rocks and oils from Oman, Siberia, and India, they found a […]