The hosts push back on criticism, voiced by science communicator Sabina Hossenfelder, that the IceCube Nobel Prize for neutrino detection taught us nothing new because neutrinos were already known to exist. They counter with historical precedent: the 1947 Lamb shift measurement by Willis Lamb confirmed a tiny hydrogen energy-level splitting that physicists suspected but hadn't measured, which falsified parts of existing theory and helped drive quantum electrodynamics forward, and similarly the Higgs boson's mass had to be measured at CERN decades after its existence was first theorized. They argue that confirming or precisely measuring already-predicted phenomena still constrains physics and can lead to unforeseen technology, noting that earlier physics breakthroughs translated quickly into things like transistors and GPS, while today's open questions require higher energies and longer timelines. They also touch on debates over string theory's lack of experimental testability and funding share, and argue experimentalists have an obligation to keep pushing regardless of what theorists predict.
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They cite physicist Rabi's famous reaction, 'Who ordered that?', to the unexpected discovery of the muon as an example of experimental findings arriving with no theoretical prediction at all.
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They mention Andrea Ghez's 2020 Nobel for work on the Milky Way's central black hole and an earlier Nobel for discovering the universe's accelerated expansion as the most recent prior astrophysics-related physics Nobels.
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They debate whether string theory draws disproportionate funding and attention within theoretical physics despite not yet being experimentally testable.
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They name LIGO, the gravitational wave detector, as a favorite physics experiment, though they say the full story belongs to a previous episode.
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