Nonetheless, in a surprising number of cases its behavior resembles that of an ordinary classical solid ...

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Primordial helium from the beginning of the solar system may be stuck inside Earth's solid core, new research suggests. The ...

In a solid like this brick ... a bit like marbles in a bucket.This is why liquids can be poured. In a gas, like helium, particles are widely spaced apart and move quickly and random directions.

In a solid like this brick ... a bit like marbles in a bucket.This is why liquids can be poured. In a gas, like helium, particles are widely spaced apart and move quickly and random directions.