It looks like this is a web page, not a feed. I looked for a feed associated with this page, but couldn't find one. Please enter the address of your feed to validate.

Source: https://mit-edu-7890524136-gov.caltech-edu.pp.ua/post/714350607152

  1. <!DOCTYPE html><html lang="en-US"><head><title>Just a moment...</title><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><meta http-equiv="X-UA-Compatible" content="IE=Edge"><meta name="robots" content="noindex,nofollow"><meta name="viewport" content="width=device-width,initial-scale=1"><style>*{box-sizing:border-box;margin:0;padding:0}html{line-height:1.15;-webkit-text-size-adjust:100%;color:#313131;font-family:system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,Noto Sans,sans-serif,Apple Color Emoji,Segoe UI Emoji,Segoe UI Symbol,Noto Color Emoji}body{display:flex;flex-direction:column;height:100vh;min-height:100vh}.main-content{margin:8rem auto;max-width:60rem;padding-left:1.5rem}@media (width <= 720px){.main-content{margin-top:4rem}}.h2{font-size:1.5rem;font-weight:500;line-height:2.25rem}@media (width <= 720px){.h2{font-size:1.25rem;line-height:1.5rem}}#challenge-error-text{background-image:url(data:image/svg+xml;base64,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);background-repeat:no-repeat;background-size:contain;padding-left:34px}@media (prefers-color-scheme:dark){body{background-color:#222;color:#d9d9d9}}</style><meta http-equiv="refresh" content="390"></head><body class="no-js"><div class="main-wrapper" role="main"><div class="main-content"><noscript><div class="h2"><span id="challenge-error-text">Enable JavaScript and cookies to continue</span></div></noscript></div></div><script>(function(){window._cf_chl_opt={cvId: '3',cZone: "mit-edu-7890524136-gov.caltech-edu.pp.ua",cType: 'managed',cRay: '90ffec59abc2d693',cH: 'skn26rYZyAfO4j3SDFgZgS9EifeaIspvei0fVN0wgOE-1739230606-1.2.1.1-0D8Fu9TElhMhktswQMFjbkGfGP7LAsauyTCuUbphqmVSZP68G8aDu3tarYdDox3I',cUPMDTk: "\/post\/714350607152?__cf_chl_tk=B8OvPMl5GAYDlIEdjXqCLVRdy9RBjPnqST7plp7fbHU-1739230606-1.0.1.1-j1e.zrih0fLkO6gffLaDMs4LsDoJ5KHLa1lWEg3vI9U",cFPWv: 'g',cITimeS: '1739230606',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/post\/714350607152?__cf_chl_f_tk=B8OvPMl5GAYDlIEdjXqCLVRdy9RBjPnqST7plp7fbHU-1739230606-1.0.1.1-j1e.zrih0fLkO6gffLaDMs4LsDoJ5KHLa1lWEg3vI9U",md: "vjYKNRIZ9PWCVEOparQuCUldlfGsMNsBxT_ConvhcMQ-1739230606-1.2.1.1-jfB7p4v1MEl_GxVM.SqPnyFlN0t8i6JRZswhVtOuJ226_RiLeC7OatrzSmLSfC2Wrf8G2cHZmsd7W7aKmfO5_G9T0Yt9IjRnoAb1zbKDBPydE6Vjg_bKXsy4QzgFLIBO7DoPBCv.NU2ntcnqPrLoPlKD3KXi7gD3CjV0ArsEA0yhzJ8vm3PcoyVgz.HLlApdhMr739ymKy64mguxDPENDLbGWPoz4xaVpm8iqETEqipBLFv8W9IEZ3HzHq9uarF8UJ1Bp5gHQ6oVU2fDh8EYT5zGw39A_UxH.N4TUCqFOHyLZGGVbMtBCEFGbBOpbaaLOg7llw494LHs_dDzZWwbtfeFJ3UbFakLKb8Ili1yT6kbjImITG5a6HcevLyWX0f5C5B5mn9eplR7P1sKSmKe._ULo0BEMsMCT8EsSorV3J09oKwAlidB_u4SKtG2cEm_wg0kvnWRryfNMt34fA1Ta9eiPd7f2yByhBYpcZk1GWmdPpJ81boxAmGSTv2C.7Z0oueEHs0JNvnoSv3gkoZY.3yAgBN5iPFxeTyHfA9wZU1QZjRMFLrTW8V.eyMrdEmyWX1tt1Gfkczq3vCk6veYnr2qHjpu0GFrkUNWdWCqxjYZ1vaQNnLjHfV1rytu1A.ha0umM0qwQdP3B2sKSdPxfXxCeECCQK5.8ylEQBurl_YpQBu8InXVdmdH7APitDoWjT8Ux2rdNugI2HCzViSfBRqbUol9kjda9.LbCla4yuAZLMU63Y3xySICDnqcdflHos4kgiYnQV9fbYOq8wm4qqwBG7VIb5dMn5WrLhy6ZNSfLgWCJtdzXNPDVtN5au6luxXqM5jd4o7ql._izvzoS8rh8DfBhIAn0DbgAJw5euZe0rZ7rlpbZvbYI4J3dbuJ0ngDQcQ3o30C5pI8yxzirtGF1dRYXOIrbPbH6X4XOY4jQsrUZ4vaGdH99LChUjxLf7NYTymrXlBhDb8FJsnfm38mOCXWeWY7Zm.4895sSBRRgFERJ4lgsGthZW99iBn8JjEyjE.L8YKwFaf49HrgTiWI9QEL0BzosTLObIngi0_aM7C9oTpMEWFB1pFzysR8713fzkYjaQ2pHx9gHKUWMNBLRz4VBZ.8BgdiaVsRVnWYUjNq6MadgfJrztpq9hfFjAGXhki2_nv3C81qAgW83IODuo2.LUGVxWxCbvfMnwLfDSChg3pqZ1XOHpSi0AFX7WGplkQ4j5cabHkjjYe2xMbZZNfsL0CkIspPFe_iuO3NYAbBjdR7yyJn6P2MDcujGo3zjs6z6VALUbBhGETBr7.3FbnU3QuCEGWTZ7Ljq11jO8kBrCdKUvuIaRf2r4cnn2h7JWx6zFyauvrqiyZ9nUIpPk22RWNNNMooDWvJVgKE5wR7AFGZk8b2R5.wZS5QRXrtWq85wtQeRSxOZiB6w8kYLAayrVmU58lkeVxLEx1fDMAtVnKyCVaObYsBAdxsjz_ZkeQb9gju0fj73cvgPeYI656nKj5hD623R6mAGZMNMdzus7NWzaDiJjKNTRujQOhDtJQdgqgipPtuFvfTzbxeBHzN2TVQvmZf7Zx2ure7rH17cBA8vv4FGshe8.09aUXgeZG0KarU5MdwdeiKSrPOMiu9YVjbAe8os8mvs8Rs3El3yphA3aixI5IKjY0s.WzYEyWOGOnwVJuXCGKvQ7U0gW0iYUdDOzzhxynZZYLMBpnX71z_Bos3B4.au4bpHUyycCcw8TL4Nz3AkyruWMrswV4C2pMeAJL90Q_ldXvsHMmSZM3grWpRbD6OuFSDgKwUBiSNWEsjbSm30qaEwv.cA0wFQX1b_MsD7u3F1K11MRMC6m_gETKSkiYSS.EXucUWM0GH9cNQWuVNJf.dDml7.iaFDL0DaK47CYxgn2q_e.OOPnnTjv18gvIIMsYE77X7gt1D_zqLHQj2UxaUN0p6CQGHAJ0xdlLnCR2s5aKBVN_pssQwf9hqeU6OSW6jzKXe4kEpQo3YPdt5WD3sjxqasrynBZtUclRUMSa0lCJmNZ6OfS7MskDLxNkqOonPFmlW1t8Z9s_Z.TKa64P0vIgSmk41cenRO36.0tjzgE41l60VR8gEFb9WuWiusbVA72.0tjtkIdNK1RS8G31pdpk9BmdTV7s5Rx4AnWrOurIsD2qKt.HiqA44TExceTuwe41_1PPXJTRjEscr2J00FZ24FYlzRNP0sENcLnwLbqsNpYbPjd0xGfe7ko9DPQKPOnHfW7yuo_U01C.VpifcDA",mdrd: "vj67XU_85ZTZ1lgpeWFn9SQenaIWlMfeymz.qT8NK94-1739230606-1.2.1.1-6ho3AWm5sVN4AFsUJwxxwgwKSsAfeltFaQodJjWPdSIAjjn.VJBHltJMSBNbUhYfMpFstHU33RSOKPSKZCLLQTp8rs13yKrUmDh_II4ld2oFC3uT5PJhwKI1uieO7pdNfOo3TEzb8v_Vjv.IQfuGLhLuFFM2mURHuE7qgSZJAdefL80utqvHKZ94fulCtEgtWIRBT9MSsMSqkeL4.Igqdjwp.iGId0.mpk6SUaM7oes6qtha6vJ88B59r7X3FRckTGhWx6kOccgtLq7zSpLdiXWQ_GhZHCHyZNUh6oHDfhdSGpNSweinyy5d82oUiW9BzrqfaVG9289rGOaVdNnHInM8jPLfJR6wQr8Z7wCcDlW0YI3f0oAPMwqAeROrEtwvW6buSFgopWyQIc0RtawKS1avbbdexY3cRtUC52vu9RVm8Vw.t2KPSWG7rie1jbcjmKWWvERy7BB7MYdYFwxL2CXZUId4DjjTg7smDVRDLP05wgbvdeUpiAGK2hxkjqrhv1Ek.I1SG4XCvuRuIuhZrxouv4soEeMY1d4Jh_7FeOWUzqXE5uqK7b0T0hDzeH.X0zWVytfRkExROthxepSc7cM7Z06Ez1N_QpJ81uKW.q46r48K0SgHG_2CSYy377TTQrPruHnSQcIqXgaCA2dqPS3xeOPh_qDby1grc5AZI4dGHWbNlWLSldUKvZIGBd1fETxsC4BH_clUWAqSWXP6Z2EN2WmhlFI1NCbk7QT2YYuWybQ8eA4Qo1iz5M5J79Pxgymr9p2uq8SKV0wJ9xfngml5oPbP5ux8ABiPgGUXXzIDnTU8d_Jv_d2lLovRwRffCuveURnhg6yxX5FbCQT1XdJ_KdMqrIZn0ie6IlCRVW0A8tDcW6Qvm_qTRwBdpqQujyT5voDUr_d9Mk29jO1QiScFrgCtB8gJzuNcbQaSmHfjozXKoKfF.emNMFdRPOWnuR4V7C9_4bycY7Sp.JG53PlpV9jZImil7sm3WsDArcEFysuE2T3lGT.Sm55b6qBaNvDXdpF9VonSlpKiEUppgnY1n1hawWwPp9MtgTS1Nni5UC6XYuDRQGoGdxrrWhUwF76KgzwF7KKAVYHClQFfKozpCXOrE8I7K5W7GQu4JfdMYK.P.6DEQZKshKi2CyCWNzFTW7LTHyiblfpa3DdwgVtt1fBfvuXOfrr9DtvHFF9Zei8GEKyI0lZUOTf78NkadDV_JpFE.tQPkjp7qwCgLcIw.Zu8DgtEbCzZgn.mng4U6tMMxcTUwEp_20EN8NjDSqibrpvIIW0XLxbiBVXUB6P5ozDGKPgPSr1KAvLYS2MKHZxhou5FK588oSLz.G8Vmurfm.A1zszjMW6IDnXZj_WcrhLx8ozz0qnE7Ff_aTaxJBRHiO53AMk9zlP2OAW.sGZMqQLrwu.K7hXrYJogGo_Tcg390Rc3V30rgemmlsn7hcienyEhoB7CNnobPKnBBgGZf_hgs1X0kWQ_E.qx8vH4cbfUqlLkTEJ_HuejzdCiEfVHU8xDizeZFAe8KD6dKuz9ZSZ3qZuzdv6s6djXhJAiR48I2HuD6CwUduvCI4G4js9DF0HIPBmpmudpc9d2nTECvvnc66StlmTbSWB7Uz293StxrCv6NMhvnmf3eIlPnAE.kNRl6h9gJGEEJAQbB46c8lmWC04u_wwzBCqXO6PyULyrazsZwo5tgjs0bTh9A2C436iVQ03V5Tn8.U52zQujUv8om5RH2gI62KCtzPWyyifcb3hy56zeGRr3RrIaeoUosWDWE71OBav6bYZfLlO416g9aBtbD5lArhuWQeIHviG_vj.WT_uA3t480cp5.u6tOurPk9ulaSVtXKYo"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=90ffec59abc2d693';window._cf_chl_opt.cOgUHash = location.hash === '' && location.href.indexOf('#') !== -1 ? '#' : location.hash;window._cf_chl_opt.cOgUQuery = location.search === '' && location.href.slice(0, location.href.length - window._cf_chl_opt.cOgUHash.length).indexOf('?') !== -1 ? '?' : location.search;if (window.history && window.history.replaceState) {var ogU = location.pathname + window._cf_chl_opt.cOgUQuery + window._cf_chl_opt.cOgUHash;history.replaceState(null, null, "\/post\/714350607152?__cf_chl_rt_tk=B8OvPMl5GAYDlIEdjXqCLVRdy9RBjPnqST7plp7fbHU-1739230606-1.0.1.1-j1e.zrih0fLkO6gffLaDMs4LsDoJ5KHLa1lWEg3vI9U" + window._cf_chl_opt.cOgUHash);cpo.onload = function() {history.replaceState(null, null, ogU);}}document.getElementsByTagName('head')[0].appendChild(cpo);}());</script></body></html>
Copyright © 2002-9 Sam Ruby, Mark Pilgrim, Joseph Walton, and Phil Ringnalda