Discovery: 1 Billion-Year-Old Micro-Fossil (VIDEO) Virginia Tech This video is under embargo. Please login to access this video. Caption Virginia Tech paleontologists have made a remarkable discovery in China: 1 billion-year-old micro-fossils of green seaweeds that predate the first green land plants that developed 450 million years ago. They hypothesize this is where modern green plants and trees come from. Credit Virginia Tech Usage Restrictions Credit Virginia Tech License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.