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-6547013892-gov.caltech-edu.pp.ua/post/440135951970

  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-6547013892-gov.caltech-edu.pp.ua",cType: 'managed',cRay: '910fe92a08dc07e4',cH: '60krM_JwmpSzSJPQkiI0DFTRd5NLHK7qiMzJNOWQtEg-1739398248-1.2.1.1-GeUD4Xa9x2d34reSGMYPnmTsc9DMqV5LkgMI_W1AbnHYRc24uZFHCiR2C91uV5F0',cUPMDTk: "\/post\/440135951970?__cf_chl_tk=bi.XZNfKRz3elH5hoBMeCkC9qv0r2ksLj1B4Jk2snYs-1739398248-1.0.1.1-Ho.mPOmkOOgkZrPFQTDfqoETjchVibLWlFC0vfquqyY",cFPWv: 'b',cITimeS: '1739398248',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/post\/440135951970?__cf_chl_f_tk=bi.XZNfKRz3elH5hoBMeCkC9qv0r2ksLj1B4Jk2snYs-1739398248-1.0.1.1-Ho.mPOmkOOgkZrPFQTDfqoETjchVibLWlFC0vfquqyY",md: "6sd5OGvubVgVZ5rS0Zg_Ggj7LHVCMjyXJDLLKnNE954-1739398248-1.2.1.1-BLDlqpAMVQ3_x80mXjYXnTCBH3CQzUOB3k9J6fFzXEf8ixCEcnUGIVGIN9_7O7Hf.AzCB8tVdAjFI8.ijcmA0zDcmBBDmlaK4lrkg4Svy8_.WJ6q.JEVRd8bfmMdhsOF7FGLstfHIMdwunprwWltRfzM953Ly1fKotX.H5ZOiwpnPBwrf4FTQ8QkW7nm9KMgiqXMaKSfLO7.nddjyVolw947gX.PrVByEoJgwKnjfEhLQI2SXvkJp_8FvoameXYYqCB.aJlDljbMIcWGsbPR_mH7ny879WIFh4idqs82U8r7JkfyRdu2A0p3qRQ3eVZ9PNYorpCtA9rxyf0s0SFX6mEmwBGFEafkx3HGAi8lkr9wmPTeCAo7ZbyOgGM4lcfPGFlh9OyoRT1Qrp4SoAQCZUsNf28EqpEwysF3AVwOb7xyq7jWq9knaYC79XVmiqOEO3QoTPnGTtSHoNGnaxwoT_faOk.Lx_EbajktgwSy4PhXoh5_mTDa.ls_nYxM789D21kIVhssU0zzJWdtfR7bLP1iI2By4WODb8OmmepF3XNMWKx5_2E2EIWbq3nNHW65c5CGf60AfPc_aCbMKaxtKt9dlZYZAixrdZYmbuZT2WJ9s6S8gRlmdzHGHxWvA_nnfJLmgjcAB6lP74.oDAMgXqpARuY9oN5qOtH2bTv.sJ9LVkoZMwls65_uZspZ_d4LrCNqNXOeiIVzXc4nvE5wfQat1k6yNszw1ox386YyPRfjX86ZpMId.X0mrk_M9vzVhn1u0SDERfrOGFQFDzE_LRGTYZE4JkJF1NfMeUdyublYrOgPxNnGh_Y8mCnw1c1zfzS3nnXOO.Rl4uw.JyW068YAuQ_mKlnosf2rcj_qTBMHFxg3b0tBZ.IoVRJqB_GjJoKw2Nhs.boxU3w7GFai4Fb_avGmhXhGLBmiOdYVoVAapHxOHtjMUgUglDdPFu1Nm3lGASa4AGVg381NpErh653RBDYCwSrmFiuGPJPejI3TujXUOGyU2pSrIEEVa4zVFQGOOK7SOV1_EpDQKciD2pxUDUwKEZuNUCaKtoGLurL8chXtnFnaHjfbaLzmMd8LROn0DjEYdDHD2ecmOkfnarAFUPXXMC_eTFzECEqr2DR09tfTHU6P086KYJIKCERaq_mM8Z_s2Stm2rmt1T93Garqq72A3njKX8cdb3W3oJx647ktgoYCCkkhPQY94Mkmpu9rQPfWFQOo.X8QHXugqqUq7CVy69ZClzyKGYMhUqmUomuKaNWCmgruTffpDryhunDE5vQtt5ZnK32Rvbjoe0K3hPBjOTNoELN08VK8YQPVzWJOQlkdsosmnYv7AVciwI2gbURuURFxNUhwoshHowPYoG8tfu5beeizHI_XTpPD0bfVdDv0JZVm8h7oenU0jgv5tZF5jrJOoivS7wGs0BmHHLw9z4Gm98o5vS36g8P1GlzguD6PUZVqONtTuxn9nUWRamEktilFt.iIr6SH3NIpidnwt9WOgU0gkUN1LdRSDg6PrOi_6vKiUX.Li5dUJTuiIoCIL.aexYd3LhJfyArEERCllxFxt0EhJgxrOLQ1xVjh9dRb7aky3bFRQ_208msJmaiS5JItaTJR3GqNlKpBBT.g43MpW4y20l2a2JMENyeNXmLBokS7uYsOyh4CH0Tbsm7Qf2BZJ8cpvwjiUltUwz.zPmFOGsh6IKdCbd3ApeQOawkvMhU7f8D4cgFmy.pBfvVLXLQcp4HiqC91olsQM9Kkr7GzSinB40BAh9p.6NHIg017B0ZVRDZpRVBIquvNjBEb8.YzRFTZqPsbbZUicKK1udAknGDsyhmS3bW561fruOKnb3SPD8Hlp35XqFxGQXWERi2no_UXOpwsSsaCBMvYKd2nu5jDKumkAfEuZYaWrMiWrVrYzLQLCukad50zYxQ6Tri.c0i4ro9zJ.9_lhdtrTEIwka0G4Uxntn9BpTKkny5vXWGmnvmH7UQgbVtGThQvPD3OF4vsh1ooRUx3Mi.c76zN2mpWLWKBs7rXDyLyzcvzaolQiY6uXFik1hjburYI7coN3hYuGebyEJW.c55K_5NHl.4AR7fy64ZJNre4etMKmvdAh4A_lyPtcj1MowpSHvQ5uG5xfQkTZuTAp6Gq5AWm8Mg8eNxmmqsJfQ8hGuG5eulzC0ZqqtBmRf2Boe92nQ8QzRQV99nkDI4QCtHlf.MhK.zLDBy5XnPawnDMJoTsCIlWhiL6QRvLN0AWd5IBT8s.1chYdzD1Q",mdrd: "vCqIeFUzFH8gXAqo0KgVoqyJSu8gfOGfz2Y08WzIYbA-1739398248-1.2.1.1-TyJyCOU6vnb4FtM.ag9WLrhPLUaK7oGBF4O96ePrpnF4MNGsG4QtZ8usJncmd9GkLpIQW9eeVNNTvrv.ahWE1_SIKIVguiRH4AQC3zZKUbon30xF79qF46ZugFY1e69Z7nadeE1vFZK0yU_QukfaEXBs.ltE5vrY3coRkAOCud5SW1hVdujTtkfe5CiNUza17M_PadwIU294Gp87.CGPlT29KhlC3nPDjnMXnrU1u8llN_QySrZRIQej811Hqm3I8TPpQ.xs3q2erOjBXepRuxobqes2SOtdf6VMvkwBdxZgSKkOnwMM33VQUsuS91tHCTKYCOVASo7Ei7POZXmKIKx5qyrFujSUJL82l6cyFZGGaFOQ5l9NgEHo.k3x3mgZBkK6JACXK.fxDSKQ6D6JTh3jI8sFF8UN4vqLRG4N.3xZsQEHZ6ly4vyH8Riq7tEqj76EYLVKk2PP6PMxzC9g8KpoFnuqnINyP_fiCQlsqFLJTy3GF56BwyfU_c5Mjy9tKhIqQuhEZy9f8ulKQWAoxCMLr2RXFxHoI6n9ougrvD_DqcgdnfNsSDvTxEBh8012HSJhlY1lBV2E5BJsQCYv3Hzz4Jexp79raKZef9rOFzYFW7dWfJTyhmVqWCYSMWu8fTbfv2lvw036Wowfgsa0ICfOCfdhikyIRinA1JjMrmqwgkaV5eNdPDZbfDwqtf4DvoOdBtzUzbC70YfXwKPfXtlx5TOCGMvJSFMCj71ImJ3ThX98fKwJ83pxFjEUIPdLujTbVDEdfLxKDyoUPttrf.2SM.WI09DD3ikRYoiiHut1Yn_cT.XOHcv.LGBOZ7fOS_ScC5NYX_vQRE.KDIMNXZpIFU7K3V.8ltIzZCsLqc3GagRNlfb7uFSBw9sLsDn10enpQwRC501qMI.oOS.88kk5h2VHsmEz4d5y9vMhFy1Pol6b6YUE39uSWHh4Rq2Sa149ChFS7rPiHZrMq7kKpj2bYSB1LFkxSj5DQD..1E5Ya7yww6ZQW5oWHySWN12HqCXaRAQuQV0o9gYVjhYMAUrsXsgzFUCJ_edmK4TyBdAt.NB1L_nbLgEC8eeyIbam7R3HNTBUj2yhG9Ij31wzC.hNe2o57zOaWhzqTqRELHlG8K8eFk7UrGGERiY6G4xsG3.ES8hivoWMTPzmKgK2bKrIFNR4s4.9P5Nx485KsT00S7k699zmIJ3FN_tDE0mXGnLBG6LCWYFqWTb.V65UGgWe8bxcXidBfOzs.8DyshauPOJpFMGH2qAXQoMK7pDI9jm561UpGjW6gCQ4pkD_09RFmqjKejbw4gEtiFpQUSpkffJ9FqDcpQg8Z.3UXPvK9XqGnSjEoSXiqQETxOYv3_QjKDJAiv_AHGdGv883TeSdgj3O0SP9MkTCuwL8ClpuE5suoWEtbab1YjTcrjpgUHwIOUZjEC.O08AgZTUuyQgLkqke.z4UF36StCi9pV909QCJlK85TVxAK4gDxwXykknmxfwUEKdz_0b1anomj73ZdB3ob6BhRjlDd0nVGWQe_trYu.2kHfL67ZJkI5NGvpka0TxFIG5LcnLN9RsFOlUaNGAZM4IsXpshx9Z5IUeB586uAnTDGnXlH7ryA4SORzlB41oNCVG5R5knLoFMG0hLbddvtcIRAR_cuQgqTXRqlzf.LBGJcdN6trKbSeY9WxCIGq5m9aYev8FLJdHBw7iua.OnrA2S8wlr5Mm_B1A2CkjhtBvHQfMKHxDse05OmjH4f34ozG4lLNGPT9KQiiBsx.QqSyvtkUXma5kLstPcZsXJPvPPwMrfgGtzy08Kh5447ptAbsoMfndwS5LaYtQmJqpdQHQzXx_NzYDVxiFy"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/b/orchestrate/chl_page/v1?ray=910fe92a08dc07e4';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\/440135951970?__cf_chl_rt_tk=bi.XZNfKRz3elH5hoBMeCkC9qv0r2ksLj1B4Jk2snYs-1739398248-1.0.1.1-Ho.mPOmkOOgkZrPFQTDfqoETjchVibLWlFC0vfquqyY" + 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