White House spokeswoman Jen Psaki said Sunday she has tested positive for COVID-19, after deciding not to travel to Europe with US President Joe Biden when members of her family contracted the virus.
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Scientists Achieve Time-Reversal Symmetry With Kagome Superconductor
A team at the Paul Scherrer Institute ( PSI ) in Switzerland has achieved a breakthrough with a Kagome superconductor (RbV3Sb5) that demonst...
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