Physicists have created the state of matter thought to have filled the Universe just a few microseconds after the big bang and found it to be different from what they were expecting. Instead of a gas, it is more like a liquid. Understanding why it is a liquid should take physicists a step closer to explaining the earliest moments of our Universe.
Not just any old liquid, either. Its collective movement is rather like the way a school of fish swims ‘as one’ and is a sign that the fluid possesses an extremely low viscosity, making it what physicists call a perfect fluid. In fact, tentative calculations suggest its extraordinarily low viscosity makes it the most perfect fluid ever created.
Researchers had confidently believed it would be something like ‘steam’, consisting of free quarks and gluons. “No one predicted that it would be a liquid,” said Professor John Nelson from the University of Birmingham, who heads the British involvement in the STAR Collaboration, a multinational experiment. “This aspect was totally unexpected,” said Professor Nelson, “and will lead to new scientific research regarding the properties of matter at extremes of temperature and density, previously inaccessible in a laboratory.”
Natasha Richardson | alfa
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