“I always found it satisfying that gravity was described by Einstein's geometric theory of general relativity.” FoundTheorySatisfyingGravityRelativityGeometricGeneral Relativity Author:Antony Garrett Lisi
“We could tell them [alien civilization] things that we have discovered in the realm of mathematical physics, but there is stuff that I would like to know. There are some famous problems like how to bring gravitation and quantum physics together, the long-sought-after theory of quantum gravity. But it may be hard to understand the answer that comes back.” KnowsMayLongHardProblemTogetherStuffAnswersTheoryCivilizationPhysicsAliensMathematicalRealmsGravityQuantumQuantum PhysicsGravitation Author:Paul Davies
“Relativity. Gravity. Quantum. Electrodynamics. Evolution. Each of these theories is true, whether or not you believe in them.” BelieveReligionAtheismTheoryEvolutionGravityQuantumRelativity Author:Neil deGrasse Tyson
“Superstring theories provide a framework in which the force of gravity may be united with the other three forces in nature: the weak, electromagnetic and strong forces. Recent progress has shown that the most promising superstring theories follow from a single theory. For the last generation, physicists have studied five string theories and one close cousin. Recently it has become clear that these five or six theories are different limiting cases of one theory which, though still scarcely understood, is the candidate for superunification of the forces of nature.” MayStillsDifferentLastsThreeStrongForceUnitedCasesClearFiveProgressGenerationsTheorySixUnderstoodWeakCandidatesStringsGravityCousinPhysicistFrameworkForces Of NatureString Theory Author:Edward Witten
“However, one new theory says that dark matter may be ordinary matter in a parallel universe. If a galaxy is hovering above in another dimension, we would not be able to see it. It would be invisible, yet we would feel its gravity. Hence, it might explain dark matter.” IfsFeelsMayMatterMightWould BeAbleUniverseDarkTheoryOrdinaryInvisibleDimensionsGravityGalaxyParallelsHoveringParallel UniverseDark Matter Author:Michio Kaku
“Well, evolution's just a theory.' And, I'm thinking to myself, 'Well, thank goodness gravity's a law.'” ThinkingWellsHumorFunnyLawTheoryEvolutionGoodnessGravity Author:Marc Maron
“But actually theory is very practical. Gravity is a theory, for example. It allows you to predict that if you step off a cliff you will fall; you don't have to collect data on that.” IfsFallStepsExampleTheoryPracticalsDataGravityCliffs Author:Clayton Christensen
“We can summarize electricity, magnetism and gravity into equations one inch long, and that's the power of field theory. And so I said to myself: I will create a field theory of strings. And when I did it one day, it was incredible, realizing that on a sheet of paper I can write down an equation which summarized almost all physical knowledge.” WritingLongSaidI CanRealizingFieldsTheoryOne DayPaperIncrediblesStringsGravityInchesElectricitySheetsEquationsMagnetismElectricity And Magnetism Author:Michio Kaku
“We went to the moon using just Newton's laws of motion and gravity. Newtonian dynamics we call it. So then we find out, "Well, this works because there's certain regimes we've never tested it in." Had we done so, we would show that it didn't work: For example, at very high speeds, very high gravity, Newton's laws fail. They just fail. You need Einstein's laws of motion and gravity. Those would be his special theory of relativity and general theory of relativity. Now you invoke those and it works.” NeedsWellsDoneShowsWould BeLawCertainFailingSpecialExampleTheoryMoonSpeedRegimesGravityTestedNewtonRelativityDynamicsInvokeHigh SpeedTheories Of RelativityLaws Of MotionNewton's Laws Author:Neil deGrasse Tyson
“I met a guy who had the same theory and wrote a book about it. His name is Walter C. Wright Jr. His book is called Gravity Is a Push. I wrote to him and told him about my father, and he said he wished he'd met him. My father died quite a while ago.” SaidBookGuyFatherNamesTheoryMetsDiedGravityFather DiedMy Father Died Author:Paul Laffoley