 |
| Previous Image | Next Image |
| Description: Mass Extinctions Mass extinctions indicate very stressful times for the biosphere. There have been five major mass extinctions during the last 540 million years. Picture Stats: Views: 611 Filesize: 131.73kB Height: 1070 Width: 1402 Source: https://biology-forums.com/index.php?action=gallery;sa=view;id=18981 |