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[ScienceD] 'Cascade of events' caused sudden explosion of animal life - Science Daily - 2013-09-20
'Cascade of events' caused sudden explosion of animal life
The explosion of animal life on Earth around 520 million years ago was the result of a combination of interlinked factors rather than a single underlying cause, according to a new study.
http://feeds.sciencedaily.com/~r/sciencedaily/top_news/top_science/~3/xFPVOWIGb8s/130919142202.htm