Astronomers see stellar self-control in action

Many factors can limit the size of a group, including external ones that members have no control over. Astronomers have found that groups of stars in certain environments, however, can regulate themselves.

Volcano knocks Mauna Loa carbon monitoring station offline

The eruption of Hawaii's Mauna Loa volcano has temporarily knocked off power to the world's premier station that measures heat-trapping carbon dioxide in the atmosphere, but officials Wednesday say it won't be a problem.

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Gas

In physics, a gas is a state of matter, consisting of a collection of particles (molecules, atoms, ions, electrons, etc.) without a definite shape or volume that are in more or less random motion.

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