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What is a light cone?

Simultaneous is not simultaneous. Space and time do not exist. These, and other strange and wonderful things, are the hallmarks of Einsteins Theory of Relativity and what we’re talking about today. A few days ago I got Request a Post which read: ahoy there,...

CERN trap 38 atoms of antimatter

For the first time ever, antimatter has been trapped by a magnetic field allowing it to be studied in detail. The 38 atoms were antihydrogen, theoretically the same as hydrogen but having the opposite charge. Where hydrogen is made of one proton, one electron,...