News tagged with animal evolution

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 oxygen-poor ...

dateJan 05, 2011 in Earth Sciences
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MicroRNA: A glimpse into the past

The last ancestor we shared with worms, which roamed the seas around 600 million years ago, may already have had a sophisticated brain that released hormones into the blood and was connected to various sensory organs. The ...

dateFeb 01, 2010 in Biotechnology
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