Токсичность океанов могла заторомозить распространение сложной жизни

[Cirill]

 

http://www.sciencedaily.com/releases/2013/02/130228113447.htm

A new model suggests that inhospitable hydrodgen-sulphide rich waters could have delayed the spread of complex life forms in ancient oceans. The research, published online this week in the journal Nature Communications, considers the composition of the oceans 550-700 million years ago and shows that oxygen-poor toxic conditions, which may have delayed the establishment of complex life, were controlled by the biological availability of nitrogen.