Mass Rarity (image) Yale University Share Print E-Mail Caption When fossils, disappear, the world changes. Today's mass rarity of marine and terrestrial species may already have a mass extinction-like fossil record. Acting to save the fossil record of today by restoring species abundance and range could ensure the stability of the biosphere. Credit Nicolle R. Fuller/Sayo-Art Usage Restrictions None Share Print E-Mail 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.