David Kaiser

I wasn't the only person in the United States who counted an extra reason to enjoy the parades and festivities this week. The announcement at CERN that two independent experimental groups had each collected convincing evidence that the long-sought Higgs particle had been found prompted the physicist and blogger Matthew Strassler to declare 4 July ‘IndependHiggs Day’. I couldn't imagine a better reason for fireworks.

One of the T-shirts you’ll see quite often around MIT says: ‘Speed limit: 186,000 miles per second. It’s not just a good idea. It’s the law.’ The speed in question is the speed of light, and the law comes from Albert Einstein’s theory of relativity. Relativity is predicated on the notion that the speed of light is unsurpassable, and most of modern physics is predicated on relativity. So this morning’s announcement that a team of physicists at CERN may have measured tiny particles, known as neutrinos, travelling faster than light has the potential to eclipse all other news that ever has or may yet come out of CERN – Higgs particles, supersymmetry and all else combined. The key word, though, is ‘potential’. By the physicists’ own reckoning, their results require a lot more scrutiny before anyone concludes that physics has one fewer leg to stand on.

Last week a team of physicists based at CERN announced that they had coaxed a handful of elusive antihydrogen atoms into existence: 38 of them, to be exact. Simply creating antimatter is no longer newsworthy; a competing team fabricated tens of thousands of antihydrogen atoms using a different method back in 2002. What’s new about the latest experiment – the result of five years’ work – is that the fragile atoms stuck around for as long as 172 milliseconds: nearly one-fifth of a second, about half as long as the blink of an eye. And when it comes to atoms of antimatter, that is an astonishingly long time.