Newly Expanded Tree of Life (image) University of California - Berkeley Share Print E-Mail Caption This is an expanded view of the tree of life, showing that bacteria make up two-thirds of all Earth's biodiversity, half of that from uncultivable bacteria called 'candidate phyla radiation.' The Archaea and eukaryotes, which includes humans, makes up another third. The red dots represent lineages that cannot, at present, be isolated and grown in the lab. Credit Jill Banfield, UC Berkeley, and Laura Hug, University of Waterloo. 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.