Home > slashdot > Did Sea Life Arise Twice?

Did Sea Life Arise Twice?

August 18th, 2010 08:27 admin Leave a comment Go to comments

eldavojohn writes “Dr. Adam Maloof has found fossils of sea sponges in Australia from 650 million years ago. You might think this is no big deal unless you consider that sea sponges were thought to have arisen 520 million years ago. These fossils predate the oldest hard bodied fossils we have by a hundred million years. Dr. Maloof is now wondering if life might have arisen twice after the first attempt was quashed 635 million years ago: ‘Since animals probably did not evolve twice, we are suddenly confronted with the question of how some relative of these reef-dwelling animals survived the Snowball Earth.’ So how is it that life survived the Marinoan glaciation? The BBC has a video on the topic and Wikipedia has a time line of the Proterozoic Eon into the Paleozoic Era.”

Source: Did Sea Life Arise Twice?

Related Articles:

  1. Study: 650-Million-Year-Old Sponges May Be World’s Oldest Animals
  2. How “Snowball Earth” Could Have Triggered the Rise of Life
  3. Antarctica Was Oasis for Life During “Great Dying” 250 Million Years Ago
  4. Dolphins Protect Themselves With Sponges To Seek Out Bottom-Dwelling Fish
  5. Did Land-Dwellers Emerge 65 Million Years Earlier Than Was Thought?
blog comments powered by Disqus