Don Lincoln

thumb|Don Lincoln Don Lincoln (born 1964) is an American experimental physicist, science communicator, and author of popular books about physics. He is a Fellow of both the American Physical Society and the American Association for the Advancement of Science. Quotes One very interesting idea is that when we get to the smallest size of all, we don't find a particle, but rather an ultra-tiny vibrating string. Superstrings January 12, 2015 Fermilab, YouTube https://www.youtube.com/watch?v=CaQnC_UmxA4&t=202s (quote at 3:22 of 8:20 in video) Two well-regarded measurements for the expansion rate of the universe disagree, leaving cosmologists very puzzled. It may be that something large has been overlooked in our theory of the Big Bang. This discrepancy is called the Hubble tension and it has led to a very interesting conversation within the cosmology community. 10.1119/1.5145465 58 4 April 2020 The Physics Teacher Is Modern Cosmology in Crisis? https://pubs.aip.org/aapt/pte/article-abstract/58/4/234/674496/Is-Modern-Cosmology-in-Crisis?redirectedFrom=fulltext I'm not personally a fan of the idea of SUSY and I never have been. But it's possible and we should continue to look for it. For one thing, if supersymmetry is false, then superstring theory is false. I don't believe in superstring theory either, but I like it. I kind of hope it's right. But hope isn't good enough in science. 32 Subatomic Stories: Is supersymmetry real? Fermilab, YouTube November 18, 2020 https://www.youtube.com/watch?v=QHhjMFfXaek&t=301s (quote at 5:01 of 14:12 in video) The history of particle physics can be considered nothing less than a huge triumph for science. Over the course of a little more than a century of effort, our understanding of the world of atomic and subatomic physics went from a vague understanding of atoms, to one that is much more detailed. Early in this hundred-year-long period, we learned about electrons (1897), then how they circle a dense nucleus (1911), followed by the discovery of the protons (1917) and neutrons (1932) that form the nucleus. From the 1930s onward, researchers used both cosmic rays and particle accelerators to discover antimatter (1932), and particles that don’t exist in atoms (e.g., the muon [1936] and neutrino [1956], as well as a huge number of others). The Physics Teachwe 59 7 521–524 October 2021 10.1119/10.0006457 Particle accelerators and their triumphant history https://pubs.aip.org/aapt/pte/article-abstract/59/7/521/364180/Particle-Accelerators-Their-Triumphant-History-and?redirectedFrom=fulltext One of the first scientific concepts taught to children is the idea that matter can be a solid, liquid, or gas. Indeed, if you were to ask most American adults how many phases of matter there are, the most likely answer you would get is three. It would not be unreasonable to consider this to be common knowledge.Yet the scientifically savvy know of far more phases of matter than the familiar three. Plasma (physics) Plasma is another, as is superfluid. And there are many more that exist at extreme temperatures or pressures. Change the conditions under which matter finds itself, and it will act in unexpected ways. Quark/Gluon Plasma: When Protons Melt The Physics Teacher 62 550–554 October 2024 10.1119/5.0235509 https://pubs.aip.org/aapt/pte/article/62/7/550/3313860 We are pretty confident at this point that the Accelerating expansion of the universe expansion of the universe is speeding up, and the thing driving it is dark energy. Now, what is dark energy? I don't know. Biggest Mysteries in Physics: Antimatter, Dark Energy & ToE - Don Lincoln Lex Fridman Podcast #497 May 29, 2026 Lex Fridman, YouTube https://www.youtube.com/watch?v=1M3Vdl6DRkU&t=8019 (quote at 2:13:39 of 2:53:42 in video) External links Category:Academics from the United States Category:Science authors from the United States Category:Physicists from the United States Category:1964 births Category:Living people Category:University of Notre Dame faculty Category:YouTubers