https://quarelia.com/https://quarelia.com/a-propos/https://quarelia.com/confidentialite/https://quarelia.com/contact/https://quarelia.com/en/https://quarelia.com/en/about/https://quarelia.com/en/contact/https://quarelia.com/en/legal/https://quarelia.com/en/newsletter/https://quarelia.com/en/oddities/https://quarelia.com/en/privacy/https://quarelia.com/en/quarelia/https://quarelia.com/en/questions/https://quarelia.com/en/search/https://quarelia.com/en/universes/https://quarelia.com/en/universes/chroneve/https://quarelia.com/en/universes/chroneve/why-did-the-vikings-reach-america-nearly-500-years-before-christopher-columbus/2026-05-24T00:00:00.000Zhttps://quarelia.com/en/universes/chroneve/why-empires-collapse/2026-04-30T00:00:00.000Zhttps://quarelia.com/en/universes/chroneve/why-the-keyboard-isnt-in-alphabetical-order/2026-04-17T00:00:00.000Zhttps://quarelia.com/en/universes/chroneve/why-time-speeds-up-with-age/2026-04-24T00:00:00.000Zhttps://quarelia.com/en/universes/chroneve/why-we-talk-about-left-and-right/2026-05-06T00:00:00.000Zhttps://quarelia.com/en/universes/corallis/https://quarelia.com/en/universes/corallis/why-the-sea-is-salty/2026-04-27T00:00:00.000Zhttps://quarelia.com/en/universes/corallis/why-there-are-tides/2026-04-20T00:00:00.000Zhttps://quarelia.com/en/universes/corallis/why-waves-arrive-parallel-to-the-shore/2026-05-03T00:00:00.000Zhttps://quarelia.com/en/universes/cosmira/https://quarelia.com/en/universes/cosmira/why-planets-are-round/2026-05-07T00:00:00.000Zhttps://quarelia.com/en/universes/cosmira/why-stars-twinkle/2026-05-01T00:00:00.000Zhttps://quarelia.com/en/universes/cosmira/why-sunsets-are-red/2026-04-25T00:00:00.000Zhttps://quarelia.com/en/universes/cosmira/why-the-sky-is-dark-at-night/2026-04-18T00:00:00.000Zhttps://quarelia.com/en/universes/evelie/https://quarelia.com/en/universes/evelie/why-is-roland-garros-named-after-a-pilot/2026-05-28T00:00:00.000Zhttps://quarelia.com/en/universes/evelie/why-mirrors-flip-left-right/2026-05-02T00:00:00.000Zhttps://quarelia.com/en/universes/evelie/why-the-week-has-seven-days/2026-04-19T00:00:00.000Zhttps://quarelia.com/en/universes/evelie/why-we-play-april-fools/2026-04-26T00:00:00.000Zhttps://quarelia.com/en/universes/evelie/why-we-say-hello-on-the-phone/2026-05-08T00:00:00.000Zhttps://quarelia.com/en/universes/lumera/https://quarelia.com/en/universes/lumera/wheres-the-internet-actually/2026-04-15T00:00:00.000Zhttps://quarelia.com/en/universes/lumera/why-does-a-voice-assistant-struggle-to-truly-understand/2026-06-04T00:00:00.000Zhttps://quarelia.com/en/universes/lumera/why-we-get-goosebumps/2026-05-04T00:00:00.000Zhttps://quarelia.com/en/universes/lumera/why-we-hear-an-inner-voice-when-we-read/2026-05-09T00:00:00.000Zhttps://quarelia.com/en/universes/lumera/why-yawning-is-contagious/2026-04-21T00:00:00.000Zhttps://quarelia.com/en/universes/lumera/why-your-voice-sounds-strange-recorded/2026-04-28T00:00:00.000Zhttps://quarelia.com/en/universes/plumaire/https://quarelia.com/en/universes/plumaire/why-aircraft-windows-are-round/2026-04-28T00:00:00.000Zhttps://quarelia.com/en/universes/plumaire/why-birds-sing-at-dawn/2026-05-10T00:00:00.000Zhttps://quarelia.com/en/universes/plumaire/why-clouds-stay-up/2026-05-05T00:00:00.000Zhttps://quarelia.com/en/universes/plumaire/why-flamingos-stand-on-one-leg/2026-04-22T00:00:00.000Zhttps://quarelia.com/en/universes/plumaire/why-is-the-sky-blue/2026-04-15T00:00:00.000Zhttps://quarelia.com/en/universes/sylvora/https://quarelia.com/en/universes/sylvora/why-dogs-circle-before-lying-down/2026-04-29T00:00:00.000Zhttps://quarelia.com/en/universes/sylvora/why-fungi-arent-plants-or-animals/2026-04-23T00:00:00.000Zhttps://quarelia.com/en/universes/sylvora/why-leaves-turn-red-in-autumn/2026-05-05T00:00:00.000Zhttps://quarelia.com/en/universes/sylvora/why-trees-dont-grow-infinitely-tall/2026-04-16T00:00:00.000Zhttps://quarelia.com/en/universes/tendrille/https://quarelia.com/en/universes/tendrille/why-do-kids-keep-saying-6-7-right-now/2026-05-14T00:00:00.000Zhttps://quarelia.com/en/universes/tendrille/why-kids-ask-so-many-questions/2026-04-21T00:00:00.000Zhttps://quarelia.com/en/videos/https://quarelia.com/en/videos/why-aircraft-windows-are-round/2026-05-01T00:00:00.000Zhttps://videos.quarelia.com/pourquoi-les-hublots-davion-sont-ronds/poster-en-17d2b6e125.jpgWhy are airplane windows round?A story of cracks and cabin pressure.https://videos.quarelia.com/pourquoi-les-hublots-davion-sont-ronds/master-en-1080.mp4602026-05-01T00:00:00+00:00plumaireyesnohttps://quarelia.com/en/videos/why-do-kids-keep-saying-6-7-right-now/2026-05-25T00:00:00.000Zhttps://videos.quarelia.com/pourquoi-les-enfants-disent-tous-6-7-en-ce-moment/poster-en-f4fd7da3a9.jpgWhy are kids everywhere saying “6-7” right now?A song by rapper Skrilla went viral on TikTok, turning the phrase into a trend. It doesn't mean anything specific — and that's exactly why it spreads.https://videos.quarelia.com/pourquoi-les-enfants-disent-tous-6-7-en-ce-moment/master-en-1080.mp4332026-05-25T00:00:00+00:00tendrilleyesnohttps://quarelia.com/en/videos/why-dogs-circle-before-lying-down/2026-05-06T00:00:00.000Zhttps://videos.quarelia.com/pourquoi-les-chiens-tournent-en-rond-avant-de-se-coucher/poster-en-f0b8a6a346.jpgWhy do dogs circle before lying down?A wolf's legacy, in 43 seconds.https://videos.quarelia.com/pourquoi-les-chiens-tournent-en-rond-avant-de-se-coucher/master-en-1080.mp4432026-05-06T00:00:00+00:00sylvorayesnohttps://quarelia.com/en/videos/why-is-roland-garros-named-after-a-pilot/2026-05-29T00:00:00.000Zhttps://videos.quarelia.com/pourquoi-roland-garros-porte-le-nom-aviateur/poster-en-012ccdbf64.jpgWhy is Roland-Garros named after a pilot?Because the stadium built in 1928 for the Davis Cup was named after Roland Garros, a World War I aviator killed in 1918, at the insistence of his former classmate who had become president of the Stade Français sports club. The pilot had no connection to tennis.https://videos.quarelia.com/pourquoi-roland-garros-porte-le-nom-aviateur/master-en-1080.mp4312026-05-29T00:00:00+00:00evelieyesnohttps://quarelia.com/en/videos/why-stars-twinkle/2026-04-29T00:00:00.000Zhttps://videos.quarelia.com/pourquoi-les-etoiles-scintillent/poster-en-fb84374189.jpgWhy do stars twinkle… but not planets?Earth's atmosphere makes their light dance.https://videos.quarelia.com/pourquoi-les-etoiles-scintillent/master-en-1080.mp4472026-04-29T00:00:00+00:00cosmirayesnohttps://quarelia.com/en/videos/why-the-keyboard-isnt-in-alphabetical-order/2026-06-08T00:00:00.000Zhttps://videos.quarelia.com/pourquoi-le-clavier-nest-pas-dans-lordre-alphabetique/poster-en-02262f7f5d.jpgWhy isn't the keyboard in alphabetical order?Because the QWERTY layout was frozen in 1873 on the first commercial mechanical typewriters, where some letters had to be kept apart so that the type bars wouldn't jam. The technical need vanished a century ago, but the muscle memory of millions of fingers didn't.https://videos.quarelia.com/pourquoi-le-clavier-nest-pas-dans-lordre-alphabetique/master-en-1080.mp4322026-06-08T00:00:00+00:00chroneveyesnohttps://quarelia.com/en/videos/why-your-voice-sounds-strange-recorded/2026-06-03T00:00:00.000Zhttps://videos.quarelia.com/pourquoi-notre-voix-nous-parait-bizarre-enregistree/poster-en-8eada7da62.jpgWhy does your own voice sound strange when you hear it recorded?Because you hear yourself through two channels at once: air, and the bones of your skull. Bone conduction adds low-frequency warmth that nobody else hears. A recording captures only the air-borne voice: the slimmer, brighter one others have always known.https://videos.quarelia.com/pourquoi-notre-voix-nous-parait-bizarre-enregistree/master-en-1080.mp4342026-06-03T00:00:00+00:00lumerayesnohttps://quarelia.com/insolites/https://quarelia.com/mentions-legales/https://quarelia.com/newsletter/https://quarelia.com/quarelia/https://quarelia.com/questions/https://quarelia.com/recherche/https://quarelia.com/univers/https://quarelia.com/univers/chroneve/https://quarelia.com/univers/chroneve/pourquoi-le-clavier-nest-pas-dans-lordre-alphabetique/2026-04-17T00:00:00.000Zhttps://quarelia.com/univers/chroneve/pourquoi-le-temps-accelere-avec-lage/2026-04-24T00:00:00.000Zhttps://quarelia.com/univers/chroneve/pourquoi-les-empires-seffondrent/2026-04-30T00:00:00.000Zhttps://quarelia.com/univers/chroneve/pourquoi-les-vikings-ont-atteint-lamerique-500-ans-avant-christophe-colomb/2026-05-24T00:00:00.000Zhttps://quarelia.com/univers/chroneve/pourquoi-on-parle-de-gauche-et-de-droite/2026-05-06T00:00:00.000Zhttps://quarelia.com/univers/corallis/https://quarelia.com/univers/corallis/pourquoi-il-y-a-des-marees/2026-04-20T00:00:00.000Zhttps://quarelia.com/univers/corallis/pourquoi-la-mer-est-salee/2026-04-27T00:00:00.000Zhttps://quarelia.com/univers/corallis/pourquoi-les-vagues-arrivent-paralleles-au-rivage/2026-05-03T00:00:00.000Zhttps://quarelia.com/univers/cosmira/https://quarelia.com/univers/cosmira/pourquoi-le-ciel-est-noir-la-nuit/2026-04-18T00:00:00.000Zhttps://quarelia.com/univers/cosmira/pourquoi-le-coucher-de-soleil-est-rouge/2026-04-25T00:00:00.000Zhttps://quarelia.com/univers/cosmira/pourquoi-les-etoiles-scintillent/2026-05-01T00:00:00.000Zhttps://quarelia.com/univers/cosmira/pourquoi-les-planetes-sont-rondes/2026-05-07T00:00:00.000Zhttps://quarelia.com/univers/evelie/https://quarelia.com/univers/evelie/pourquoi-la-semaine-fait-7-jours/2026-04-19T00:00:00.000Zhttps://quarelia.com/univers/evelie/pourquoi-le-poisson-davril/2026-04-26T00:00:00.000Zhttps://quarelia.com/univers/evelie/pourquoi-les-miroirs-inversent-gauche-droite/2026-05-02T00:00:00.000Zhttps://quarelia.com/univers/evelie/pourquoi-on-dit-allo-au-telephone/2026-05-08T00:00:00.000Zhttps://quarelia.com/univers/evelie/pourquoi-roland-garros-porte-le-nom-aviateur/2026-05-28T00:00:00.000Zhttps://quarelia.com/univers/lumera/https://quarelia.com/univers/lumera/pourquoi-internet-nest-pas-dans-le-ciel/2026-04-15T00:00:00.000Zhttps://quarelia.com/univers/lumera/pourquoi-le-baillement-est-contagieux/2026-04-21T00:00:00.000Zhttps://quarelia.com/univers/lumera/pourquoi-notre-voix-nous-parait-bizarre-enregistree/2026-04-28T00:00:00.000Zhttps://quarelia.com/univers/lumera/pourquoi-on-a-la-chair-de-poule/2026-05-04T00:00:00.000Zhttps://quarelia.com/univers/lumera/pourquoi-on-entend-une-voix-interieure-quand-on-lit/2026-05-09T00:00:00.000Zhttps://quarelia.com/univers/lumera/pourquoi-un-assistant-vocal-a-tant-de-mal-a-vraiment-comprendre/2026-06-04T00:00:00.000Zhttps://quarelia.com/univers/plumaire/https://quarelia.com/univers/plumaire/pourquoi-le-ciel-est-bleu/2026-04-15T00:00:00.000Zhttps://quarelia.com/univers/plumaire/pourquoi-les-flamants-roses-se-tiennent-sur-une-patte/2026-04-22T00:00:00.000Zhttps://quarelia.com/univers/plumaire/pourquoi-les-hublots-davion-sont-ronds/2026-04-28T00:00:00.000Zhttps://quarelia.com/univers/plumaire/pourquoi-les-nuages-tiennent-en-lair/2026-05-05T00:00:00.000Zhttps://quarelia.com/univers/plumaire/pourquoi-les-oiseaux-chantent-le-matin/2026-05-10T00:00:00.000Zhttps://quarelia.com/univers/sylvora/https://quarelia.com/univers/sylvora/pourquoi-les-arbres-ne-poussent-pas-infiniment-haut/2026-04-16T00:00:00.000Zhttps://quarelia.com/univers/sylvora/pourquoi-les-champignons-ne-sont-ni-plante-ni-animal/2026-04-23T00:00:00.000Zhttps://quarelia.com/univers/sylvora/pourquoi-les-chiens-tournent-en-rond-avant-de-se-coucher/2026-04-29T00:00:00.000Zhttps://quarelia.com/univers/sylvora/pourquoi-les-feuilles-rougissent-en-automne/2026-05-05T00:00:00.000Zhttps://quarelia.com/univers/tendrille/https://quarelia.com/univers/tendrille/pourquoi-les-enfants-disent-tous-6-7-en-ce-moment/2026-05-14T00:00:00.000Zhttps://quarelia.com/univers/tendrille/pourquoi-les-enfants-posent-tant-de-questions/2026-04-21T00:00:00.000Zhttps://quarelia.com/videos/https://quarelia.com/videos/pourquoi-le-clavier-nest-pas-dans-lordre-alphabetique/2026-06-08T00:00:00.000Zhttps://videos.quarelia.com/pourquoi-le-clavier-nest-pas-dans-lordre-alphabetique/poster-89c587e0b5.jpgPourquoi le clavier n'est pas dans l'ordre alphabétique ?Parce que la disposition QWERTY a été figée en 1873 sur les premières machines à écrire mécaniques, où certaines lettres devaient être éloignées pour éviter que les tiges ne se coincent. Le besoin technique a disparu il y a un siècle, l'apprentissage de millions de doigts a continué.https://videos.quarelia.com/pourquoi-le-clavier-nest-pas-dans-lordre-alphabetique/master-1080.mp4332026-06-08T00:00:00+00:00chroneveyesnohttps://quarelia.com/videos/pourquoi-les-chiens-tournent-en-rond-avant-de-se-coucher/2026-05-06T00:00:00.000Zhttps://videos.quarelia.com/pourquoi-les-chiens-tournent-en-rond-avant-de-se-coucher/poster-a9f21cffae.jpgPourquoi les chiens tournent-ils en rond avant de se coucher ?Héritage du loup, en 39 secondes.https://videos.quarelia.com/pourquoi-les-chiens-tournent-en-rond-avant-de-se-coucher/master-1080.mp4392026-05-06T00:00:00+00:00sylvorayesnohttps://quarelia.com/videos/pourquoi-les-enfants-disent-tous-6-7-en-ce-moment/2026-05-25T00:00:00.000Zhttps://videos.quarelia.com/pourquoi-les-enfants-disent-tous-6-7-en-ce-moment/poster-8396c8c56d.jpgPourquoi les enfants disent tous "6-7" en ce moment ?Une chanson du rappeur Skrilla devenue virale sur TikTok a propulsé l'expression. Elle ne veut rien de précis — et c'est précisément ce qui la fait circuler.https://videos.quarelia.com/pourquoi-les-enfants-disent-tous-6-7-en-ce-moment/master-1080.mp4302026-05-25T00:00:00+00:00tendrilleyesnohttps://quarelia.com/videos/pourquoi-les-etoiles-scintillent/2026-04-29T00:00:00.000Zhttps://videos.quarelia.com/pourquoi-les-etoiles-scintillent/poster-ec9c024c4c.jpgPourquoi les étoiles scintillent-elles ?L'atmosphère terrestre fait danser leur lumière.https://videos.quarelia.com/pourquoi-les-etoiles-scintillent/master-1080.mp4502026-04-29T00:00:00+00:00cosmirayesnohttps://quarelia.com/videos/pourquoi-les-hublots-davion-sont-ronds/2026-05-01T00:00:00.000Zhttps://videos.quarelia.com/pourquoi-les-hublots-davion-sont-ronds/poster-0da7fd1cf7.jpgPourquoi les hublots d'avion sont-ils ronds ?Une histoire de fissures et de pression cabine.https://videos.quarelia.com/pourquoi-les-hublots-davion-sont-ronds/master-1080.mp4632026-05-01T00:00:00+00:00plumaireyesnohttps://quarelia.com/videos/pourquoi-notre-voix-nous-parait-bizarre-enregistree/2026-06-03T00:00:00.000Zhttps://videos.quarelia.com/pourquoi-notre-voix-nous-parait-bizarre-enregistree/poster-1292503adb.jpgPourquoi notre voix nous paraît bizarre quand on l'entend enregistrée ?Parce que vous vous entendez par deux chemins en même temps : l'air et les os du crâne. Les vibrations osseuses ajoutent du grave que les autres n'entendent pas. L'enregistrement, lui, ne capte que la voix aérienne, celle, plus aiguë, que les autres connaissent.https://videos.quarelia.com/pourquoi-notre-voix-nous-parait-bizarre-enregistree/master-1080.mp4332026-06-03T00:00:00+00:00lumerayesnohttps://quarelia.com/videos/pourquoi-roland-garros-porte-le-nom-aviateur/2026-05-29T00:00:00.000Zhttps://videos.quarelia.com/pourquoi-roland-garros-porte-le-nom-aviateur/poster-4250134bc8.jpgPourquoi Roland-Garros porte le nom d'un aviateur ?Parce que le stade construit en 1928 pour la Coupe Davis porte le nom de Roland Garros, aviateur mort en 1918, à la demande de son ancien camarade de promotion devenu président du Stade Français. L'aviateur n'avait aucun lien avec le tennis.https://videos.quarelia.com/pourquoi-roland-garros-porte-le-nom-aviateur/master-1080.mp4352026-05-29T00:00:00+00:00evelieyesno