Ice clouds in marine regions at high latitudes might form in warmer and drier air than was previously believed because of freezing induced by airborne particles that contain organic materials from ...

Contributed by Mario J. Molina, December 19, 2019 (sent for review September 23, 2019; reviewed by Robert L. McGraw and Fangqun Yu) High concentrations of ultrafine particles (UFPs), approaching 1 ...

Researchers have detected particle pairs emerging directly from the vacuum during high-energy proton collisions, providing the clearest evidence yet that mass can arise from empty space. The finding ...

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Seemingly empty vacuums are actually teeming with perturbations known as virtual particles that are nearly impossible to detect. Virtual particles vanish quickly, but by smashing protons at ...