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-0524189673-gov.caltech-edu.pp.ua/post/0524189673

  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-0524189673-gov.caltech-edu.pp.ua",cType: 'managed',cRay: '91010c895834064c',cH: '5GkRsVXeIkvSAnb3m5mHb9WkQN_k3eYep0dsiZXyxh0-1739242410-1.2.1.1-CrazaFcS1s853RQMy5Y8PCNz7XG3zKNFMvPShAgZ7UBhWNjMVhDUzesbxJJH1rAx',cUPMDTk: "\/post\/0524189673?__cf_chl_tk=VA_PHSnp6t0p.4dDOxSH3.nW5IaTQZ5YLcb_dEZuZBk-1739242410-1.0.1.1-N65iqGdPACfsNwCkzgiLU_om_jlZTXJm_T80O_zFhyk",cFPWv: 'g',cITimeS: '1739242410',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/post\/0524189673?__cf_chl_f_tk=VA_PHSnp6t0p.4dDOxSH3.nW5IaTQZ5YLcb_dEZuZBk-1739242410-1.0.1.1-N65iqGdPACfsNwCkzgiLU_om_jlZTXJm_T80O_zFhyk",md: "yExHhbtW8ioaRKm3uKajQclGGSwMKOldinbZ0YTLs8s-1739242410-1.2.1.1-du0rb0xk5D5ffv15K0Kmc9iFCNbC.KI.egkGiQD3FiQY_JNjWWVIhKJt_mwDEvLZCMhLowVPC91SBvlORsx41tuoo44RXJpQHtXDUztGFrnsjpbgAm.EpaMpKCQfgIHCubz8M0NYbFJQ_UROekcyTXHtGqUAdrfCHqO.dzircbwAfV7jlQX3gda7ehxc3Zgq1Fbzuk.doy0FZHc3S.Nh81PJ4yyTcv5oxWLuGab3APPQUDm_jSgdg2wJDOIQkf3Lupd0JQhiOyyfqUnLqs7JUXeeHAU5Dbo.Vt73rKLSISSFF6BO9IrSzxUf8.SElrEJBaxPzdwLHLShdWqMbsgHWF_v6U9AOUgDO7X5DvBAFKxWo6LchQduMZvuUIfkSyC458Js_rw5X_PavuQPSZuWG0KEVgi8JmUuNjnuJX18SxdebLDN71sKc65nYBzQbveWbxUtEnio7SMmr7EQdAGZbYLiaEdQeNX3ajEPwEIpoaT8cVGe3Q1HgaqixP5iFYsP3tMiflus4KO0_dDR0muRdpp0ZKYGSSuIVpJRBYwPwwlHD.au6sOR5hTuqDj_cKgI1kAHqIk8aTAM9zn.yRY8jzyu1jB7EgCqzyOq208WopsU3xXw6zhEjdEV4.NUlfDMERSYC2kA8bVJcVoU1Bl6mmpyvIbEgBOlMphK96tnjT6ld0uEXoaLJ2vcFSzqe1Wlo9JFzvyJv9lW4AbXnTyU.tjPbahVmEtiJdE8Fo7rUGtRU3_Mj3uU321UkAMmpElyKKjsnlvgUPlOk4W1lec6GUJsLVrJxAlYniFv.PXzQpewnTnEl5rgpyTzeDRQ_8DdHzeQT0wT003tZgosgXEaOX6IQ9w3Qp6XDNHBeHDOk95jUhRykFBTcMcxacOnsudwHFR9eHgGtWsAbrPck2_Zhql2S8_I4qkPo.mxvBGGVvBQm20a1iMWbYnYLBuuz.4hulfUvthkpPecTs4iRR7pIoNyTSmTYB8rjcoQXkdKml63yhE7cxiH8yZmca2caQvqxyv5k3fX9dpd0HCns3HKa4s7.D8Rh3m035kp_lOTZGAFUskrkuDlU.ICVLS8tHqAzv8AXaekt7FuiLvgIDFwjtoVujJxu1INAcjxgAGFPz7HEkGnfeaucTwbBnggnjoUVvqeeiKpOOSuXphCmBqlA.VdrSwMpPp0ORuPpgBYcgWtCqGbjlJpyqaIB8XQ.ztb8I3NZpYzG7KS77K9dJ.e6itUnzbLrfEsyO5Xa0KmgJ42wL2pPMAqFlPkmosU04XP5GNGcdCAub_rlm2cxYmtjC4.hF.JvO7eXdPiDnd4S.4M9AD3V2AWFo2s31Wmycut7Uj1pHQ2U3yax7GM5dBa0_LcnihlSXXYzbnQwxC0RSc_faDpE3.FxeFIeW60zr7bWmo_Kx8f1T0pZYhaptWnLGuLDoJto7BE9KHCXV3BN6b2rDy6Md.0Osd1NtIGrtd5kbb.dpsxoDGruft4ds.zWSGFM8pof2dJmOAD3l6PYB.fWSPz3j6sftpr8R07RMbtWZqNbWkH4o4sPvLoLJ0wbjBXC..ss5f9Sgns2dPAVF70kt2mFvDF1RsqSBC8CbrQ.953F1aI9CQgrMYq6uN.mxxT6y.CZYCRn.vFTEM_SJ6OIEgu34pm3KwEJ4FrsUPAKo.yzlz6tOoCS6._GhCH3YYDXzBm5Qodmfb3kmUfOZMAJMpF81Ntlhd_4qCaB9O88S97DpncsVuQqCgXKS9ZgOHSv77htc2D7kzb2qcfanY4j..dyEjcgFvxNUSCeTXTmoeFzNpKM.TlTjuoucCUNMwqGpN9ozLCnLFt8rIyqcheJPkKBdVvnmdnk._5951C6aUkLWDG2Z5NLvtPlzV5JEuBhxMe.kwZCkEP9L.gFrsYuDkUoCrTLD_23TjHSC0kWlGML3ua3l9J_C45l84ZdqHD1HOAkQ83P6RNG8HuCVy6pQsKAoMdUGDwMUl5luKEgGGL44sQokRr1mYtlTKOfLKTo3OxqyiOjJnLPx3D7yiUdU6kykOs_Wy3LMSd3C7cQG7ha7Lkvby.JkiW3mKgAtEhl7x1PUzqWwvMSUoP8P41wyj9KtUeOrcnRTraY0fapl4oOdN120MitiJzwaG66LFxd5Esn81Uru61ptRpRFGA_0MlDcL7itut5JOGVjVOjBHSQ.1qNhQJzRX7Ev_p91NGiWSnfDrX4hypxNFlX4fO5ki6e.iah6thmQUVUTZOXC.EHjFuPBQk9ZIodXF.Rw",mdrd: "KMAJ5fQal5v3rVr_XAM25WZYksx47dmx4FZf2u0yvvM-1739242410-1.2.1.1-7VoFrjLYxkawaYBTr40W9vyAGWPvKfrt.0xwXikqsry0_xqjIcSyKAiOEf4aqUvV8R6dk7zow.QynDnk9HuyVVoqHFKBj59GR4.dHFh_UJfStYDfpW44qZejvSuFm7ek.ORfdJTlejmSv2uin0GyTpO9XEB80ywAcwb6vTKEXnwyew0E5ie__XvXRjfThtqLf.dEzZUj7OGy4dJL3Uwqp3TGNBXu4y62mLuFAGkZpm30SiHe.PEAbe9CVjRXwckYpKeNCT7JLu8upctkKX1anbBEiA366iDNVfVEldWqCtyuKQ01a.fqtRxXj0x7VSHPe0zH6BTVyQMMI4Tzza4pBHQ3R2txlR.ZcicQbKsD6WcTSQmosKS4I29Ig2pPVIk.BAzTzIsymEOO4w_4W3TQwa_K02851H6TdVFRYoZH8hIeRtFa7XW0Fm7QHyR7LgxDdTYZkqyWQswpeX.W7wNv_0OwXa5NMTIYwhIGCul56bsHWvA.NNT4uW3VbNHx4oyWeMgJDyeyRybtZn1t0UR6xXiJbs09z7qzvhCfkgW.1p2VQt6TifnEmUKbVSm.OfL8jmvn8sZ_LQA3vg72BS0rhrGx0L5pGhrSVSRIoPloSJeMbrNY1EwUpzKQuiHmLwpqjoWBik9TM_BKkRwmsXh7L1P07V0AggVoA7z866E4AyRXZ8c8sz7030kiKFjuNAcfLQOuqX9Jt29ifKduxNI0oF1FAEuhcZka1dDvqoy1Rbj_1F66T0qk0rD244WoYTbQwdGhDOTSmNiVoYDVei7WaYOT1lzaJQ_HpbLEV7Ekj4FYjPqLh43VEbmK1uLEkHV66NPcf1iTE13nhEAYxEuhvqeaGFuOpIGqZsLiWrUtIaXYqCsvots_RgZzJWeXDQvki8BexsHtD.0sYkaKMESbaKNJ6HoTsd6NXBmw6yU3um4xs_2o4AxmA8QfisEyHSUruRzLTWPV_RdPzifQdF_77gQGKFPtCy3BDIAMCglN4W4JnouqQcpW0KKUIxxo1LQeTroCFcH7UGjXddAw9LvBHV5u5E1IwkrNWJwzpivUtVkHQW7_f2wgwVtWFhJuUcWDlD2912rs6RJmLDron8S8.ozgjq2AVuUUAIZpm4q.Nrs8pjyH8QOpJfckmdm3EmotpjnW7yF6i8C94rOODDuoljO.sWd7Q6hMqJISa5Dufa.UUhHTiMj_VF_NPG0mJO3J_jtvLcpt4nmj.Phe6T2btxMXwQ1JD_4bOnG4rvxDKlUeyE2SSdBNLWxF1mwRhY4Hw0lQOwqWKkVSooRtyLRtxlGmiF6bSjiYNrgPgBzFUbZvl8Xa4pVj36LLfDNPSsb4qprN8S23oY0iHTrKNYygWal.4Yft1w29pvOkK9qOKxIOqJEhs6xbv.jV3g22YwsIQdA5UF6ClZqUmGjphIWL98FKXpKuOQUXLa2Y9Aoa7BSE93FYybxOdq6SyfdJ5YWMnukCT8hbIcdLrJ3W_fqpjD9U5U3uO2vuQdlHliDcc.ody_oTs66eUjgMfIRW1yjd1ziyAgbN9oztmmPxFjRZ6deE5wzwtnDtaewJLEmnScqSXXFc8GkizMEu8yts1BUm8zSbQQ5TsUZuvu_auL3.TReUIPo8IdLgQK7vSzCFY3IFc26WM.X_BYB4S4ZjOuAdMxoImwvMI7uK6YEvijdhHjiP4CPqyJa8jo.UYV0qYEH4296O3inslDitYLyqL8P1tm28vev2qc1OasoQFF6M36OihrZcz8Y9k38Ishsv9ylWVTFzLXdP_yzoX814wt8f_qBeFVR5NV8i.DmKRetC9C4_QYxTF0E29HVe7YN2FsL.UI5CUGG_PYb_6PRl7K.bFlpN3fW2gAbQNBwR4dNZqQ"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=91010c895834064c';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\/0524189673?__cf_chl_rt_tk=VA_PHSnp6t0p.4dDOxSH3.nW5IaTQZ5YLcb_dEZuZBk-1739242410-1.0.1.1-N65iqGdPACfsNwCkzgiLU_om_jlZTXJm_T80O_zFhyk" + 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