University of California - Riverside

Oxygen's challenge to early life

The conventional view of the history of the Earth is that the oceans became oxygen-rich to approximately the degree they are today in the Late Ediacaran Period (about 600 million years ago) after staying relatively ...

Jan 05, 2011
4.4 / 5 (15) 10 | with audio podcast

How Social Insects Recognize Dead Nestmates

(PhysOrg.com) -- When an ant dies in an ant nest or near one, its body is quickly picked up by living ants and removed from the colony, thus limiting the risk of colony infection by pathogens from the corpse.

May 05, 2009
4.3 / 5 (6) 1