This is The Guardian.

On Tuesday morning, a box the size of a filing cabinet, weighing one ton, was lifted by crane, slowly moved, and then placed very carefully in the back of an

unassuming lorry. It was very exciting and before such a day you don't have a lot of sleep.

Inside was an extremely precious and unusual cargo.

If the stuff being transported touched anything, even the container it was contained in,

it would have completely ceased to exist.

We have to tie it down, then we drive off.

92 antiprotons were taken for a 30 minute we have to tie it down, then we drive off.

92 antiprotons were taken for a 30-minute gentle spin around the campus of CERN,

the particle physics laboratory in Geneva.

Today was really the, let's say, for us it's a historic moment that we left with the trapped antimatter for the first time the antimatter factory building of CERN.

But did 92 antiprotons return?

Today I hear from science editor Ian Sampal about CERN's groundbreaking anti-matter road trip

and why they're so keen to transport the most exotic material on Earth.

From The Guardian, I'm Madeleine Finley, and this is Science Weekly.

Ian, I think we need to start this episode with a bit of a primer on antimatter. Yes, so antimatter is an unusual substance, and it's one of my favorite examples of where

mathematics shows that something is possible, and then physics confirms that that is actually

the reality. And this all came about when Paul Dirac in 1928 was doing work for which he got the Nobel Prize. And he got

that for marrying quantum theory, theory of subatomic particles, with Einstein's special

relativity, his theory of space and time. And what dropped out of that was that not only

there the particles that we're aware of,

you know, your electrons, your protons, your neutrons,

...