where they can deliver antimatter to your door
You mean if you live on the 4km loop 'serviced' by BASE-STEP?
I shudder to think of the paperwork the EU would require for authorization to transport antimatter off-campus. But they have hauled it around for up to 20 minutes (https://www.antimatter.hhu.de/en/about-us/base-step) so in principle it could go a bit farther!
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