From the Editor's Desk

Will physics ever prove that gravitons are real?

In 2009, the British journalist Ian Betteridge wrote an article in which he asserted his maxim that any headline ending in a question mark can be answered with a no. The maxim has come to be called Betteridge’s law, but this article will demonstrate that, as with so many other proverbs, the truth gets murkier once applied to real-world situations.

Gravitons are theoretical subatomic particles that some scientists think transmit the force of gravity. If they exist, they are vanishingly small and have no mass or electric charge. To generate gravity, the thinking goes, gravitons jump from one massive object to another, drawing the objects ever closer to each other. Although no experimental evidence for gravitons exists, they remain a respectable concept in the world of professional physicists.

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