Archive: 01/5/2011

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

Where MRSA colonizes on the human body

When methicillin-resistant S. aureus (MRSA) is carried in the nose (nares), it is a risk factor for an invasive infection, including a surgical site infection. Some studies have found that the heavier the carriage of MRS ...

Jan 05, 2011 4.7 / 5 (6) 3 | with audio podcast