By studying galaxy clusters separated by hundreds of millions of light-years, Penn physicist Patricio Gallardo and ...
Plasma, the fourth state of matter, consists of a gas in which electrons are no longer bound to atoms, which allows ...
The most precise measurement yet shows the Universe is expanding faster than expected, deepening the Hubble tension. The ...
Researchers have developed a way to flip time to move backward in a quantum system. This level of control could lead to ...
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