In what may be the most audacious scientific courier job ever attempted, physicists at CERN are preparing to load antimatter into a van and drive it across the facility's campus. It's a feat that sounds like science fiction - and until now, it was.
Antimatter, the mirror-image counterpart to normal matter, annihilates instantly on contact with regular atoms in a burst of energy. For decades, the handful of laboratories worldwide that can create it have kept it magnetically suspended in ultra-high vacuum chambers, isolated from any surface that would destroy it. Moving it anywhere seemed impossible.
But the BASE-STEP project at CERN has developed a portable trap that can hold antiprotons - the antimatter equivalent of protons - stable for hours while being transported. The engineering challenge is staggering: the trap must maintain a vacuum a trillion times thinner than Earth's atmosphere while keeping the antimatter suspended in magnetic fields, all while bouncing along in a vehicle.
Why transport antimatter at all? The answer lies in one of physics' deepest mysteries. According to the Standard Model, the Big Bang should have created equal amounts of matter and antimatter. They should have annihilated each other completely, leaving nothing but radiation. Yet here we are, in a universe made almost entirely of matter.
Somewhere, somehow, matter and antimatter must behave slightly differently. The BASE experiment measures antimatter properties with exquisite precision, looking for even the tiniest asymmetry. But CERN's antimatter factory sits above ground level, where cosmic rays and other particle interactions create a noisy background that limits measurement sensitivity.
The solution: drive the antimatter to a quieter location. By moving antiprotons to underground facilities or specialized low-background laboratories, physicists can perform measurements that are currently impossible. It's the scientific equivalent of taking your telescope to a dark-sky site - except your telescope contains the most volatile substance known to physics.
The first transport test will be modest: moving antiprotons a few hundred meters across CERN's campus. But if successful, it opens extraordinary possibilities. Antimatter could be transported to atomic clocks for precision tests of fundamental physics, or to labs studying whether antimatter falls up or down in Earth's gravity field - a question that remains experimentally unanswered.
There's also the sheer cost factor. Antimatter is phenomenally expensive to produce - estimates suggest a gram would cost trillions of dollars to make, though nobody has ever made anywhere close to that amount. CERN's antiproton factory is one of only a few facilities worldwide that can create it. Being able to transport antimatter means more labs can study it without building their own trillion-dollar production facilities.
