The Big Debate Over the â€¨Oldest Life on Earth
Oxford paleontologist Martin Brasier asserts that his fossilized cells are the remains of primitive anaerobic bacteria that lived 3.4 billion years ago. Paleobiologist J.W. â€œBillâ€ Schopfâ€™s samples, he believes, are just ancient, patterned rock, with no fossils at all. Settling the debate matters a great deal. At its heart is one of the biggest questions in science: When and where did life begin?