Watch this fascinating demonstration of air pressure at work. Notice how the egg vibrates as the heated air escapes around it, and how it gets smoothly pushed into the bottle by atmospheric pressure.

A strange new phase of ice has been discovered during experiments with the world's largest X-ray laser. Meet ice XXI, a ...

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Ever since botanists knew that sap was carried from the roots of a tall tree to the leaves at its top they have wondered what force was responsible for this transportation. One theory held was that ...