London - We accept having fingerprints taken and eyeballs scanned by airport security.

But we might have to reveal our knees, too.

Scientists claim each of us has a unique kneecap and that an MRI scan could positively identify us.

Researcher Lior Shamir, of Lawrence University in the US, says: “The test is perfect for airport security. Contact lenses can fool iris recognition systems and passports can be forged but it’s difficult to alter your kneecaps.”

The system is not yet perfect as MRI scanners are slow. But the technology is improving, so get ready to put your knees on show. - Daily Mail