By Rachel Feltman
Scientists have released a new version of the tree of life, showing everything we know about how the living things of Earth are related to one another. With 2.3 million species and counting, it’s the most complete model of its kind — but there’s a lot more work to do.
Continue reading This new, ‘complete’ tree of life shows how 2.3 million species are related
 
		


 Kurtz, a professor of arts at the New York State University, was detained and interrogated for 22 hours as a bioterrorism suspect.
Kurtz, a professor of arts at the New York State University, was detained and interrogated for 22 hours as a bioterrorism suspect.

