Does antimatter fall upwards? New CERN gravity experiments aim to get to the bottom of the matter.

No, antimatter will not fall up as that would require negative mass. There is no such thing as negative mass. QED.

Yes, this experiment is still worth doing because if there is even the slightest chance of being wrong, it’d be world-shaking in it import. It would mean that anti-gravity is in principle possible.

But it’ll fall down because that’s just how mass works in this universe.