--- title: "Meaning & Key Takeaway of: When you look at the calculation, it's…" description: "\"When you look at the calculation, it's amazing that every time you try to prove or disprove time travel, you've pushed Einstein's theory to the very li..." image: "https://sms4smile.com/quotes/i/c62/michio-kaku-907_amazing_when-you-look-at-the-calculation-it-s-am_1184772.png" --- # When you look at the calculation, it's amazing that every… ![“When you look at the calculation, it's amazing that every time you try to prove or disprove time travel, you've pushed Einstein's theory to the very limits where quantum effects must dominate. That's telling us that you really need a theory of everything to resolve this question. And the only…” quote by Michio Kaku](https://sms4smile.com/quotes/i/c62/michio-kaku-907_amazing_when-you-look-at-the-calculation-it-s-am_1184772.png) [Download](https://sms4smile.com/quotes/i/c62/michio-kaku-907_amazing_when-you-look-at-the-calculation-it-s-am_1184772.png) [Open image](https://sms4smile.com/quotes/i/c62/michio-kaku-907_amazing_when-you-look-at-the-calculation-it-s-am_1184772.png) > “When you look at the calculation, it's amazing that every time you try to prove or disprove time travel, you've pushed Einstein's theory to the very limits where quantum effects must dominate. That's telling us that you really need a theory of everything to resolve this question. And the only candidate is string theory.” [Michio Kaku](https://sms4smile.com/quotes/author/michio-kaku/) ## About This Quote This interpretation was drafted with AI assistance. It is one reading of the quote, not the author's own explanation. The quote argues that attempts to test time travel push Einstein’s relativity to quantum scales, implying a unified theory—likely string theory—is needed. **In simple terms:** Testing time travel shows relativity meets quantum limits, needing a unified theory. Key Takeaway Seek a theory of everything. Themes physics quantum mechanics relativity philosophy cosmology Mood curious thoughtful inquisitive Type scientific philosophical inspirational When to use this quote - research proposals - academic conferences - science education - popular science talks - policy discussions on funding Key Concepts string theory unification quantum gravity Questions to Reflect On - How can we test string theory experimentally? - What alternatives exist to a theory of everything? A Different Perspective String theory is unproven and faces experimental challenges. ★ ★ ★ ★ ★ No ratings yet [Amazing](https://sms4smile.com/quotes/about/amazing/) [Calculation](https://sms4smile.com/quotes/about/calculation/) [Candidate](https://sms4smile.com/quotes/about/candidate/) [Disprove](https://sms4smile.com/quotes/about/disprove/) [Limits](https://sms4smile.com/quotes/about/limits/) [Physics](https://sms4smile.com/quotes/about/physics/) [Quantum](https://sms4smile.com/quotes/about/quantum/) [Resolve](https://sms4smile.com/quotes/about/resolve/) [String theory](https://sms4smile.com/quotes/about/string-theory/) [Time](https://sms4smile.com/quotes/about/time/) [Time travel](https://sms4smile.com/quotes/about/time-travel/) [Travel](https://sms4smile.com/quotes/about/travel/) ## Related quotes > [Once again, my colleague Stephen Hawking has upset the apple cart. The event horizon surrounding a black hole was once though to be an…](https://sms4smile.com/quotes/michio-kaku/once-again-my-colleague-stephen-hawking-has-upset-the-apple-cart-the/) [Michio Kaku](https://sms4smile.com/quotes/author/michio-kaku/) > [I had two passions when I was a child. First was to learn about Einstein's theory and help to complete his dream of a…](https://sms4smile.com/quotes/michio-kaku/i-had-two-passions-when-i-was-a-child-first-was-to-learn-about/) [Michio Kaku](https://sms4smile.com/quotes/author/michio-kaku/) > [We need a theory that goes before the Big Bang, and that's String Theory. String Theory says that perhaps two universes collided to create…](https://sms4smile.com/quotes/michio-kaku/we-need-a-theory-that-goes-before-the-big-bang-and-that-s-string/) [Michio Kaku](https://sms4smile.com/quotes/author/michio-kaku/) > [String theory is based on the simple idea that all the four forces of the universe: gravity, the electromagnetic force and the two nuclear…](https://sms4smile.com/quotes/michio-kaku/string-theory-is-based-on-the-simple-idea-that-all-the-four-forces-of/) [Michio Kaku](https://sms4smile.com/quotes/author/michio-kaku/) > [Time travel and teleportation will have to wait. It may take centuries to master these technology. But within the coming decades, we will understand…](https://sms4smile.com/quotes/michio-kaku/time-travel-and-teleportation-will-have-to-wait-it-may-take-centuries/) [Michio Kaku](https://sms4smile.com/quotes/author/michio-kaku/) > [For bedtime reading, I usually curl up with a good monograph on quantum physics or string theory, my specialty. But since I was a…](https://sms4smile.com/quotes/michio-kaku/for-bedtime-reading-i-usually-curl-up-with-a-good-monograph-on/) [Michio Kaku](https://sms4smile.com/quotes/author/michio-kaku/) > [“String theory promises to take a further step beyond that taken by Einstein's picture of force subsumed within curved space and time geometry. Indeed,…](https://sms4smile.com/quotes/john-d-barrow/string-theory-promises-to-take-a-further-step-beyond-that-taken-by/) [John D. Barrow](https://sms4smile.com/quotes/author/john-d-barrow/) > [The beauty of string theory is the metaphor kind of really comes very close to the reality. The strings of string theory are vibrating…](https://sms4smile.com/quotes/brian-greene/the-beauty-of-string-theory-is-the-metaphor-kind-of-really-comes-very/) [Brian Greene](https://sms4smile.com/quotes/author/brian-greene/) > [According to String Theory, what appears to be empty space is actually a tumultuous ocean of strings vibrating at the precise frequencies that create…](https://sms4smile.com/quotes/roy-h-williams/according-to-string-theory-what-appears-to-be-empty-space-is-actually/) [Roy H. Williams](https://sms4smile.com/quotes/author/roy-h-williams/) > [In the book, I make the point that here we have string theory and here we have twistor theory and we don't know if…](https://sms4smile.com/quotes/roger-penrose/in-the-book-i-make-the-point-that-here-we-have-string-theory-and-here/) [Roger Penrose](https://sms4smile.com/quotes/author/roger-penrose/) > [Every string theory that's been written down says the speed of light is universal. But other ideas about quantum gravity predict the speed of…](https://sms4smile.com/quotes/lee-smolin/every-string-theory-that-s-been-written-down-says-the-speed-of-light/) [Lee Smolin](https://sms4smile.com/quotes/author/lee-smolin/) > [In many ways, string theory attempts to go beyond Einstein's dream... an all-encompassing description of nature that works at large distances where gravity becomes…](https://sms4smile.com/quotes/ashoke-sen/in-many-ways-string-theory-attempts-to-go-beyond-einstein-s-dream-an/) [Ashoke Sen](https://sms4smile.com/quotes/author/ashoke-sen/) > [The full name of string theory is really superstring theory. The 'super' stands for this feature called supersymmetry, which, without getting into any details,…](https://sms4smile.com/quotes/brian-greene/the-full-name-of-string-theory-is-really-superstring-theory-the-super/) [Brian Greene](https://sms4smile.com/quotes/author/brian-greene/) > [I spent most of my career doing high-energy physics, quarks, dark matter, string theory and so on.](https://sms4smile.com/quotes/geoffrey-west/i-spent-most-of-my-career-doing-high-energy-physics-quarks-dark/) [Geoffrey West](https://sms4smile.com/quotes/author/geoffrey-west/) > [We do not know how to formulate string theory nor do we know its underlying principles. Surprisingly, this fact does not stop us from…](https://sms4smile.com/quotes/nathan-seiberg/we-do-not-know-how-to-formulate-string-theory-nor-do-we-know-its/) [Nathan Seiberg](https://sms4smile.com/quotes/author/nathan-seiberg/) ## More by Michio Kaku > [“My fundamental premise about the brain is that its workings—what we sometimes call “mind”—are a consequence of its anatomy and physiology, and nothing more.…](https://sms4smile.com/quotes/michio-kaku/my-fundamental-premise-about-the-brain-is-that-its-workings-what-we/) [Michio Kaku](https://sms4smile.com/quotes/author/michio-kaku/) > [I have nothing against investment banking, but it's like massaging money rather than creating money.](https://sms4smile.com/quotes/michio-kaku/i-have-nothing-against-investment-banking-but-it-s-like-massaging/) [Michio Kaku](https://sms4smile.com/quotes/author/michio-kaku/) > [I am a figure skater, which helps me appreciate Newton's theory of mechanics.](https://sms4smile.com/quotes/michio-kaku/i-am-a-figure-skater-which-helps-me-appreciate-newton-s-theory-of/) [Michio Kaku](https://sms4smile.com/quotes/author/michio-kaku/) > [If space is a fabric, then of course fabrics can have ripples, which we have now seen directly. 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Consciousness two is where we understand our position in society: who's top dog, who's underdog…](https://sms4smile.com/quotes/michio-kaku/consciousness-one-level-is-understanding-where-we-are-in-space/) [Michio Kaku](https://sms4smile.com/quotes/author/michio-kaku/) > [It would take a civilization far more advanced than ours, unbelievably advanced, to begin to manipulate negative energy to create gateways to the past.…](https://sms4smile.com/quotes/michio-kaku/it-would-take-a-civilization-far-more-advanced-than-ours-unbelievably/) [Michio Kaku](https://sms4smile.com/quotes/author/michio-kaku/) > [A human body can think thoughts, play a piano, kill germs, remove toxins, make a baby all at once. Once it's doing that your…](https://sms4smile.com/quotes/michio-kaku/a-human-body-can-think-thoughts-play-a-piano-kill-germs-remove-toxins/) [Michio Kaku](https://sms4smile.com/quotes/author/michio-kaku/) > [“I’m as fond of my body as anyone, but if I can be 200 with a body of silicon, I’ll take it. —DANIEL HILL,…](https://sms4smile.com/quotes/michio-kaku/i-m-as-fond-of-my-body-as-anyone-but-if-i-can-be-200-with-a-body-of/) [Michio Kaku](https://sms4smile.com/quotes/author/michio-kaku/) > [Science is about principles. It's about concepts. It's not about memorizing the parts of a flower. 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Brooks } says that this will probably not…](https://sms4smile.com/quotes/michio-kaku/but-on-the-question-of-whether-the-robots-will-eventually-take-over/) [Michio Kaku](https://sms4smile.com/quotes/author/michio-kaku/) > [The idea that excites me the most concerns the two greatest puzzles in science: the origin of the universe, and the origin of consciousness.…](https://sms4smile.com/quotes/michio-kaku/the-idea-that-excites-me-the-most-concerns-the-two-greatest-puzzles/) [Michio Kaku](https://sms4smile.com/quotes/author/michio-kaku/) [Explore all 328 Michio Kaku quotes ](https://sms4smile.com/quotes/author/michio-kaku/) ## More Amazing quotes > [My favorite galaxy of all is called the Sombrero, NGC 4594. It's an amazing galaxy that is really two galaxies in one.](https://sms4smile.com/quotes/sandra-faber/my-favorite-galaxy-of-all-is-called-the-sombrero-ngc-4594-it-s-an/) [Sandra Faber](https://sms4smile.com/quotes/author/sandra-faber/) > [I don't own designer clothes, or a sports car, or a huge house, but I am seeing the world, experiencing amazing things, and I…](https://sms4smile.com/quotes/roz-savage/i-don-t-own-designer-clothes-or-a-sports-car-or-a-huge-house-but-i-am/) [Roz Savage](https://sms4smile.com/quotes/author/roz-savage/) > [There is something about the South that accepts the supernatural. If you don't accept it and you're having a conversation with someone who does,…](https://sms4smile.com/quotes/alice-englert/there-is-something-about-the-south-that-accepts-the-supernatural-if/) [Alice Englert](https://sms4smile.com/quotes/author/alice-englert/) > [Yoga's an amazing release.](https://sms4smile.com/quotes/monica-keena/yoga-s-an-amazing-release/) [Monica Keena](https://sms4smile.com/quotes/author/monica-keena/) > [I struggled and I did theater for 10 years, for 15 years, I tried to get little parts here and there in TV shows.…](https://sms4smile.com/quotes/james-tupper/i-struggled-and-i-did-theater-for-10-years-for-15-years-i-tried-to/) [James Tupper](https://sms4smile.com/quotes/author/james-tupper/) > [I think cricket is there in Usain Bolt's blood. Since I got to watch from close quarters, it was amazing to see him run…](https://sms4smile.com/quotes/harbhajan-singh/i-think-cricket-is-there-in-usain-bolt-s-blood-since-i-got-to-watch/) [Harbhajan Singh](https://sms4smile.com/quotes/author/harbhajan-singh/) > [Literally every person in my life is so amazing. I even don't understand how I am so blessed](https://sms4smile.com/quotes/anonymous/literally-every-person-in-my-life-is-so-amazing-i-even-don-t/) [Anonymous](https://sms4smile.com/quotes/author/anonymous/) > [I got to travel a lot and meet amazing people. That was a lot of fun.](https://sms4smile.com/quotes/bhavish-aggarwal/i-got-to-travel-a-lot-and-meet-amazing-people-that-was-a-lot-of-fun/) [Bhavish Aggarwal](https://sms4smile.com/quotes/author/bhavish-aggarwal/) > [Under Thatcher, who ruled us with an iron rod, great art was made. Amazing designers and musicians. Acid house was born. 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