Earth's breathable atmosphere tied to plate tectonics?

The rise of oxygen is one of the biggest puzzle in Earth's history. Our planet's atmosphere started out oxygen-free. Then, around 3.5 billion years ago, tiny microbes called cyanobacteria (or blue-green algae) learned out ...

Scientists narrow global warming range

(Phys.org) —Australian scientists have narrowed the predicted range of global warming through groundbreaking new research.

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