How 'sticky' is dense nuclear matter?

Colliding heavy atomic nuclei together creates a fluidlike soup of visible matter's fundamental building blocks, quarks and gluons. This soup has very low viscosity—a measure of its "stickiness," or resistance to flow.

Summer in the city: Climate science reveals the impacts of heat

The summer sun beats down. People without air conditioning must find refuge in schools and community centers. Outdoor workers struggle to keep cool. Hot nights interrupt people's sleep, not allowing them to get the rest needed ...

A first look inside radium's solid-state chemistry

For the first time in history, scientists have measured radium's bonding interactions with oxygen atoms in an organic molecule. Scientists have not measured this bonding before because radium-226 is available only in small ...

New insights on the role of nucleon exchange in nuclear fusion

Low-energy nuclear fusion reactions can potentially provide clean energy. In stars, low-energy fusion reactions during the stages of carbon and oxygen burning are critical to stellar evolution. These reactions also offer ...

Seeing the color of entangled photons in molecular systems

Spectroscopy is the study of how matter absorbs and emits light and other radiation. It allows scientists to study the structure of atoms and molecules, including the energy levels of their electrons. Classical optical spectroscopy ...

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