Access
To read this story in full you will need to login or make a payment (see right).
News and Views
Nature 410, 317-319 (15 March 2001) | doi:10.1038/35066664
Open Innovation Challenges
-
Direct Molecular Detection of Proteins and Nucleic Acids
This Challenge is looking for novel approaches to protein and nucleic acid detection. This is an Id...
-
Methods to Analyze Consumer Emotions
The Seeker is looking for methods to analyze consumer emotions. This Challenge requires only a writ...
- More Challenges
- Powered by:
nature jobs
Assistant / Associate Professor
- Yale University
- New Haven, CT
Postdoctoral Associate in Enzyme Biochemistry
- Cornell University
- Ithaca, New York
Biogeochemistry: Oxygenating the atmosphere
Norman H. Sleep
Abstract
Photosynthesis is the main source of oxygen in Earth's atmosphere. But it may have been geological activity that first allowed an oxygen-rich atmosphere to develop.
We usually give little thought to the air we breathe. Yet the Earth's atmosphere was not always as rich in oxygen as it is today.
To read this story in full you will need to login or make a payment (see right).
