Word: theorists
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...equally well, mathematically, when the direction of time is reversed. Yet no one has ever been able to travel back in time. Theoretical physicists find the situation intriguing: if the laws that govern nature really permit time reversal, there should somehow be a way to achieve it. Now a theorist at Princeton University has come up with a way that travel into the past might, in principle, be accomplished, even if it may not be practical...
...than they had seemed. In the former category, for example, is the 1936 discovery of a new particle, the muon, an elementary particle similar to the electron but more massive. Existing theories had predicted no such thing, and its appearance greatly complicated high-energy physics. "Who ordered that?" grumbled theorist I.I. Rabi at the time. But the muon and its kin led eventually to a new understanding of the subatomic world...
...ONLY Tocqueville could have been there. The 19th century French theorist who warned against excessive democracy would have marveled at the spectacle of consumer rights advocate Ralph Nader leading some 200 Harvard students in a rally for more openness and inclusion in the University's presidential selection process...
...scientific theorist is not to be envied," Einstein said in a 1922 lecture. "For Nature, or more precisely experiment, is an inexorable and not very friendly judge of his work...
...what's a string theorist to do? Rather than beg their respective governments to fund a particle accelerator stretching to the edge of the universe, physicists have taken a different tack--looking backwards in time...