An anonymous reader writes: Sabine Hossenfelder at the blog Backreaction has this curious story of a new paper which makes an experimental test of the "multiverse" in string theory:
"In a recent paper, William Kinney from the University at Buffalo put to test the multiverse-entanglement with the most recent cosmological data.
The brief summary is that not only hasn’t he found any evidence for the entanglement-modification, he has ruled out the formerly proposed model for two general types of inflationary potentials...
Much to my puzzlement, his analysis also shows that some of the predictions of the original model (such as the modulation of the power spectrum) weren’t predictions to begin with...To add meat to an unfalsifiable idea that made predictions which weren’t, one of the authors who proposed the entanglement model, Laura Mersini-Houghton, is apparently quite unhappy with Kinney’s results and tries to use an intellectual property claim to get his paper removed from the arXiv. I will resist the temptation to comment on the matter and simply direct you to the Wikipedia entry on the Streisand Effect. Dear Internet, please do your job."