> Fortunately we have astronomic events. That may help with some things, though it's not at all clear it's sufficient to verify a true theory that "explain[s]

> Fortunately we have astronomic events. That may help with some things, though it's not at all clear it's sufficient to verify a true theory that "explain[s] everything we know exists." It brings to mind the graviton, which I've read would be practically impossible to detect: you could detect one graviton every ten years with a Jupiter-mass detector placed very close to a neutron star, but the shielding needed to exclude the noise would cause it to collapse into a black hole.