Tag Archives: Cambrian

Ancient earth. 3 The air we breath; how our atmosphere evolved

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Our modern land sea and air. But what was it lie 4 billion years ago?

The really ancient earth: How our atmosphere evolved

Take a deep breath. Savour it.  One of the few absolutes of our physical world (that we probably haven’t looked after as well as we might have).  This post continues the theme “The Really Ancient Earth” by looking at what we know about the origin of our atmosphere; some of the evidence and some of the hypotheses.  What was it like on day 1 (about 4600 million years ago) and how did it evolved into our breath-taking world today? Continue reading

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