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Physics World reveals its top 10 breakthroughs for 2010

1st place: Antihydrogen success

The antihydrogen breakthroughs scooped our first prize because it ought now be possible to carry out the first detailed studies of the energy levels in antihydrogen. Any slight differences in the levels compared to ordinary hydrogen could shed light on one of the biggest mysteries in physics – why there is so much more matter than antimatter in the universe.