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Bad Astronomy | Earth's ozone layer was weaker in the distant past

About 2.5 billion years ago, the Earth did not look at all like it does today.

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Research questions 'whiff of oxygen' in Earth's early history

HANOVER, N.H. – January 5, 2022 – Evidence arguing for a “whiff of oxygen” before the Earth’s Great Oxygenation Event 2.3 billion years ago are

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Life on Earth needs iron to survive; do aliens?

You probably know that the human body needs iron to keep going. However, if Earth wasn’t fortified with iron (kind of like your cereal), life here might have never existed.

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How changing levels of iron shaped the evolution of life on Earth — and why alien hunters should take note

During the development of life on planet Earth over billions of years, iron deficiency may have stimulated evolution.

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How changing levels of iron shaped the evolution of life on Earth – and why alien hunters should take note

Life doesn’t just need water and oxygen to thrive, it also needs iron.

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