HAVE you ever wondered what kinds of animals were on the world first? Experts keep discovering new fossils and finding new evidence that tells us more about early life on Earth.
The first fossils that show life are from about 3.5 billion years ago! They were called stromawtolites. They were sticky clumps of bacteria that sent out filaments.
About 630 million years ago, spongy multi-celled animals such as worms, soft corals, sea fans and sea anemones formed.