--- title: "4 Christophe Galfard Quotes - Famous Physicist" description: "French physicist and writer... | Christophe Galfard is a French physicist and writer. Browse 4 Christophe Galfard quotes." image: "https://sms4smile.com/quotes/i/c1d/christophe-galfard-64130_space_sound-does-not-spread-in-the-vacuum-of-s_1089659.jpg" --- # Christophe Galfard (1976) Physicist **4** quotes in **50** categories Rate this collection: ★ ★ ★ ★ ★ No ratings yet Christophe Galfard is a physicist. ## Quick Facts About Christophe Galfard Born March 30, 1976 Profession Physicist ## About Christophe Galfard French physicist and writer... \| Christophe Galfard is a French physicist and writer. ## Quotes by Christophe Galfard > [“sound does not spread in the vacuum of space.”](https://sms4smile.com/quotes/christophe-galfard/sound-does-not-spread-in-the-vacuum-of-space/) [Christophe Galfard](https://sms4smile.com/quotes/author/christophe-galfard/) [Sound](https://sms4smile.com/quotes/about/sound/) [Image](https://sms4smile.com/quotes/i/c1d/christophe-galfard-64130_space_sound-does-not-spread-in-the-vacuum-of-s_1089659.jpg) > [“Even today, more than eighty years after Oort's bold guess, we still don't have a clue what this dark matter is made…](https://sms4smile.com/quotes/christophe-galfard/even-today-more-than-eighty-years-after-oort-s-bold-guess-we-still/) [Christophe Galfard](https://sms4smile.com/quotes/author/christophe-galfard/) [Clue](https://sms4smile.com/quotes/about/clue/) [Image](https://sms4smile.com/quotes/i/975/christophe-galfard-64130_clue_even-today-more-than-eighty-years-after_1665499.jpg) > [“Everyone should be very grateful radioactivity exists at all. It can kill you, yes, but without it you wouldn't have been born…](https://sms4smile.com/quotes/christophe-galfard/everyone-should-be-very-grateful-radioactivity-exists-at-all-it-can/) [Christophe Galfard](https://sms4smile.com/quotes/author/christophe-galfard/) [Atoms](https://sms4smile.com/quotes/about/atoms/) [Image](https://sms4smile.com/quotes/i/8a2/christophe-galfard-64130_atoms_everyone-should-be-very-grateful-radioac_2313297.jpg) > [“Our image is here and will for ever stay, and there is comfort in knowing that the memory of our lives will…](https://sms4smile.com/quotes/christophe-galfard/our-image-is-here-and-will-for-ever-stay-and-there-is-comfort-in/) [Christophe Galfard](https://sms4smile.com/quotes/author/christophe-galfard/) [Astronomy](https://sms4smile.com/quotes/about/astronomy/) [Image](https://sms4smile.com/quotes/i/f2d/christophe-galfard-64130_astronomy_our-image-is-here-and-will-for-ever-stay_2578849.jpg) ```json { "@context": "https://schema.org", "@graph": [ { "@type": "ItemList", "@id": "https://sms4smile.com/quotes/author/christophe-galfard/#itemlist", "name": "Christophe Galfard Quotes", "numberOfItems": 4, "itemListElement": [ { "@type": "ListItem", "position": 1, "item": { "@type": "Quotation", "text": "“sound does not spread in the vacuum of space.”", "creator": { "@type": "Person", "name": "Christophe Galfard" }, "url": "https://sms4smile.com/quotes/christophe-galfard/sound-does-not-spread-in-the-vacuum-of-space/", "image": { "@type": "ImageObject", "@id": "https://sms4smile.com/quotes/i/c1d/christophe-galfard-64130_space_sound-does-not-spread-in-the-vacuum-of-s_1089659.jpg", "contentUrl": "https://sms4smile.com/quotes/i/c1d/christophe-galfard-64130_space_sound-does-not-spread-in-the-vacuum-of-s_1089659.jpg", "url": "https://sms4smile.com/quotes/i/c1d/christophe-galfard-64130_space_sound-does-not-spread-in-the-vacuum-of-s_1089659.jpg", "width": 1080, "height": 1080, "caption": "“sound does not spread in the vacuum of space.” — Christophe Galfard", "creditText": "SMS4Smile Quotes", "creator": { "@id": "https://sms4smile.com/quotes/#organization" } } } }, { "@type": "ListItem", "position": 2, "item": { "@type": "Quotation", "text": "“Even today, more than eighty years after Oort's bold guess, we still don't have a clue what this dark matter is made of. We know it exists. We know where it is. We have maps of its presence within and around galaxies throughout the universe. We even have stringent constraints on what it is not , but we have no clue what it is. 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It can kill you, yes, but without it you wouldn't have been born in the first place. On Earth, deep under your feet, our planet happens to contain many atoms that do decay, all the time. Less so now than in the past, but still, Earth's mantle is radioactive. When atoms decay there, the particles they emit bump into their neighbours and generate heat, the very heat that contributes to keeping our planet warm. Without radioactivity, there would be no seismic or volcanic activity. The surface of the Earth would have been dead cold billions of yeras ago. Life as we know it would probably not exist at all.”", "creator": { "@type": "Person", "name": "Christophe Galfard" }, "url": "https://sms4smile.com/quotes/christophe-galfard/everyone-should-be-very-grateful-radioactivity-exists-at-all-it-can/", "image": { "@type": "ImageObject", "@id": "https://sms4smile.com/quotes/i/8a2/christophe-galfard-64130_atoms_everyone-should-be-very-grateful-radioac_2313297.jpg", "contentUrl": "https://sms4smile.com/quotes/i/8a2/christophe-galfard-64130_atoms_everyone-should-be-very-grateful-radioac_2313297.jpg", "url": "https://sms4smile.com/quotes/i/8a2/christophe-galfard-64130_atoms_everyone-should-be-very-grateful-radioac_2313297.jpg", "width": 1080, "height": 1080, "caption": "“Everyone should be very grateful radioactivity exists at all. 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