… million years. 9.) Sea Sponges. Pinterest Sea sponges are ancient, dating back around 760 million years. Their linage is traced back to the first non-micro organisms on the planet. 10.) Bacteria. Pinterest Bacteria are one of the most basic and oldest forms of life on Earth. These tiny creatures ruled the world for the last 3.5 billion years. They’re also terrifying because they can cause a wide variety of deadly diseases. 11.) Jellyfish. …
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