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-7248956130-gov.caltech-edu.pp.ua/post/7248956130

  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,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHdpZHRoPSIzMiIgaGVpZ2h0PSIzMiIgZmlsbD0ibm9uZSI+PHBhdGggZmlsbD0iI0IyMEYwMyIgZD0iTTE2IDNhMTMgMTMgMCAxIDAgMTMgMTNBMTMuMDE1IDEzLjAxNSAwIDAgMCAxNiAzbTAgMjRhMTEgMTEgMCAxIDEgMTEtMTEgMTEuMDEgMTEuMDEgMCAwIDEtMTEgMTEiLz48cGF0aCBmaWxsPSIjQjIwRjAzIiBkPSJNMTcuMDM4IDE4LjYxNUgxNC44N0wxNC41NjMgOS41aDIuNzgzem0tMS4wODQgMS40MjdxLjY2IDAgMS4wNTcuMzg4LjQwNy4zODkuNDA3Ljk5NCAwIC41OTYtLjQwNy45ODQtLjM5Ny4zOS0xLjA1Ny4zODktLjY1IDAtMS4wNTYtLjM4OS0uMzk4LS4zODktLjM5OC0uOTg0IDAtLjU5Ny4zOTgtLjk4NS40MDYtLjM5NyAxLjA1Ni0uMzk3Ii8+PC9zdmc+);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-7248956130-gov.caltech-edu.pp.ua",cType: 'managed',cRay: '9110c15fb8910678',cH: 'q3XUdz41hDyfyKhg.LgMR2MamtlvhH_nwcAwSUpquGo-1739407103-1.2.1.1-oQ78RHTze76BTEdZOSr1UsTEY4vXahC6_eicggv.rUJTnRxdsXsusCIJqZD0PZ4i',cUPMDTk: "\/post\/7248956130?__cf_chl_tk=pDh3ShU5CIbhfzat5P9akHHPwzYPHf.DnfmluEscvLk-1739407103-1.0.1.1-G7UXk3YjUwhTWKDqQr.dBBdG45N8z8Oe22lJScMZYgQ",cFPWv: 'b',cITimeS: '1739407103',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/post\/7248956130?__cf_chl_f_tk=pDh3ShU5CIbhfzat5P9akHHPwzYPHf.DnfmluEscvLk-1739407103-1.0.1.1-G7UXk3YjUwhTWKDqQr.dBBdG45N8z8Oe22lJScMZYgQ",md: "c_FsX8jNE494rejL_9UTRS029R.FF7INIWDDRYPj1vs-1739407103-1.2.1.1-V.WtfdsnNP3cwJvPa_SCHO7EXcfuJ_YpPfyBXGf5uU3imYhj3nioQRRWrMhE8yWhT0_Tjjq0bcKlTr.IcEBj0551pty1OpRlEVmffvgEsDa3BW4LOTnYTRLXA56lnhF_dS8u57yhl2zhlJPwtKUO4yKqaaNq5wSSYKFYWKRiDpnqfc9Sd6k31cnFtkfFZaCHdBuL1YvMBte76xOoZ8gLikzMPmVvP0VIeKCMi.mRs0NvLw2JSBD58djqkNWUv2rYctg4xWnWs9t_Gg8dYnU1WuUKwftDSoRzYScj.UB7yGjpuWUvGE_Z5Mx1vVhLCSSvxzaTbx.b9qFB4YJftW0fIF1XlRi1GTeUfxkvJ2mgIlso8taooHZAWvMFBHH3APFTgbPPJK8ZVReJv9KdKmG27.RJxSx.k3V0ZIYV0odYifl1w9fPG3HD6z59cw1jLbdaGue2kdyt8xLfZnDzIbcSLweV2EDBDZ4UNHzEadx2gyqveQJyu.TCTJCa2ClOT1160upC6hMtt5RsMF6CIv2aEWoaZhDWXhlcny5MG6iVxGy1d9ddWXk0_qJgZqQ3tjcwHtqTZkEozTctFCHSvYVk5nqG2MBK.jV12PoHeW1VhPnH74rNy_MzSgxPsYErn74fIFxPubQT1AaL33NRpda9u.xp92toryaWcZClE5DUlWjqIEI4iS0GUOVdCL2JRHdqLhNZyBHT_Wz3DWCfjGlhgxpzscvXdpKYaHBUGG8fEXB_S5qZu0HBJugpLSemJiR5I8jfTmpFtrAMvO.lwGWWRybsgtNLsGaIpND1x9PGt5JNokJJQPVXZr75zezAaTh.6ViEbyav4lCNjleXcU9eGoDBO2CdmefjlMDzasMgEjlcBXG4MeP6WcqRW7_pKsRfp6B5t8X6XI8KwEAfBAQ8GP5jns3sCt.MHYXecdQWxklJzQe_WNTznexHvZ.hQMQP2GJKXj239t4CE_Q4EDLzuhxEN4fM1DK4kBh.O37lHbrjdIgS4X0Nu3DErxMeIB8AbwVUOBN1Q.utIYV73rzMNP13JYgt.FRUll2qX72uoW8ZDgMkdZHMaDBOTtwk2ErnDskJn10Ti4pUeCdWPZWZHrM.dJbqr_YiYhOqQPFXUsylDLNqLyRF367xk9oxHyoT8wF4kJVIR0FT2IOLWa36iZwDPeurWMF430ZL95Hl1jYej32iXgEUBnL6jprWdXJIX6f3nR91s4icBn8CVxaZ0jQsMDyeQw9nYb6xBRJISxv0a.nxVCqfPHaqQ73.vAe3_._KKjmj4EpdzIh0JjvZ.1LX7HbJ5pMXgf0vbO4TsXmhvctStjrTSB.fC22Fpp.9A8jm7Z3DURefmmRvzn7eW9hXxxQEeoWiHUBzz8m.rlHLJSR.fA4k_aF0DkIZB0PHEjUrdBybfXPm1joUcfN8.UAoukdab8O1s0XqHncyZL4YmhqCiYMy109aXGt28P3a5ASk76.BYCBZy3QbCW7AUbefveID27oPtU1BY81f9HGOUbuPP6.hXLP5JxaQfq7L.YXW_h_5UUIEo3ZWRli1AyQ26qvfEqQ_9hHESPPUg4TehrX5cGAB1o6K6YyAlbrBTmn7Vc_41OvQLSSSWlss464ZfCsQsTWxJrLdwxH5ZmHr_mg1DcIUtr5kGY7lTNa.IsZzXZOkubERRlLoPOwIxIgOnROtsFygt_J46vfjo8BIBuH2VmbUp7F0Hg_HdF3wXqfxnKGtBjZEG98qfDABVSnCnJ5aPv9WizApr8bN3XXRTcxkfIqp6WzL76tNNEZtIB8iLR89Wj9jwZzMF2K7spt6rZRtcmjq4lXolsmDVwlcGJLMRmV.vzPZl.IUAzROXwZyD4Kd8DF_NwazJknU5pRnyi7SoSPxJPGwxd_HNrC5ZErcAZPk8OLgX2lSkUi0yWCUB9GBuFIV2GY3APlkDduI4UN2tUMphyld7mWS7DclUiFtRB.SyOf1wRjlg599emMljK.d8JecNkZp7Ff9gdS7_kXBhe63OgSyc5gfuXGsvModjviPVaFUinRBe0yUjLXNSROL9_lD9cwnC25Umj2XltyyY3JoJmLgN8VqUhEV1.d6vTezQg46A5D2owP4vY6J_xs2tvuQY0Jlsh_nGG75ed5cRHP1tJCmCzuify7TVhexysxUt1QI0KDOcDFEv5ZiOUntFP4Z.PLLr3OCts11O3G7DflslPRo9Btz1Y.zfeQ3xQjobARzyjDVpflLw3gs56wQlfyfn_Ms1e3BkA",mdrd: "f2YqRHuPHg0YeEnLF2QoCjKBKLVX_Z3iqbrUHJZjM5E-1739407103-1.2.1.1-k84BW1TLmg.Suf1GLSa8SMi2p9IO1I0fOVhcwoTIvsl43YCoU8bq3xw._JHTnNaelojAV.czD4pKKgsAPNiGGTlrWOO4zM_ZOxbWYvVaLgmkixTv94Q.cTwsN0oT3xKym57xEKphoOOv4u2z0nCLJLp9r2UyTWZcZWi52xRX27hzwIKYSK_2J5MIB4n9G2MxtjxPhUhkQrFURrlEYHM39brNIfA14N7kDKmZvZYlwna1Wnr8xmnPzvh2Mp3ua2Vw7p0B9Iw.OpYL9RB4OF3IUz8_ZW5apCJ9ZXL7AreoNPE7f3wH52qxC8PqooCO7GrPu5E3QerBrBKrinw7r5eITfaPv92AQLeQhd0.yjR53Y1ClRzV_C0RP6UkwGKujV7vV4umvKAAXIXmVELTgEXtTT6eVyZC1oKq6FJqXt.CXsvg2Jnimq3EycRKE2x5ptVF.Qnd3pDbE.TlyNodYebOBKyyQSNGPjXGO.aO9iDKyx.IMxeUYfB_qDFTn0z8zEnBMGTmSzemhje.2c4w4wA9dArQYQwbzPk.vsX_5vdbLyU_IdROrvdmSkf338.aIh1xO.SDXT37MGm1XkprbmCRgg37u2E9eG8uhhdg0dDrkn8W5RmpZ_Dk41FOOOE5Hfr_mLaQKfUfgiNMuUD6EDDrzIgvl7kfyANoCJB2nJvVBFbdx3zXtDoa9GfhO9ei2dPnCjaK0S1rd31omIXu5b2VAUk8X_7i87rfWo8Xm.a0E_XwuN.XyJSULNLK2qrBEb2VA7YFy45vhgvmb4K4fRKqpF.CGzWMXd5Br1X5TeY9x6P24YAHfVriNvxI574UPkH7aAFupyS_99Ktt0BQoLIgin4.QT3KVg.Dtgv83cbSpNPPXETtQeUU0ZGKWajGc4_qpJyXMr6VFFc5iSI4WB.jrEgatiunCmKWyVUmpkFWvpRqVF2GHt4IZhk2T85MatvSEVmeKSEdyHAWOnUDzoSM13fBpKTLP5BKzbuDlbyFg_Y0dMah4FpjfQDCi59jKa._vSAeABdalD5prGJz1IOOi9EyaGRHBCJq_JfFVMdm44bLBmbwBJcrxZqXj8QXjTxupzxoHFjlH79Dq9lvLqZcWuV77HhyJrr15ZWnFp3yqZ9suac6QwMfGZywtO2P88cNP.5Gp8L2eZOgHe6VMmfN_97ATQT25MPdQjbFKNs4l86wiT4LsQjE_AjGQwJ7Gg6ZzEuBpiyWG_5t6tDfPRC1DQHEVHZWwUUwvPONt03aiJYkx5p8bmh3kOGDbPojdq6QGSDLsmUgQm9OKu8P9DbuamHqFdeBRhy2nIr0PWO6pjKs9env5JAGvXK6epsuzXUXnqwH1b05wTI9lUWXv.oXWOjKxM1k52YtlGgb4YtfEjKQyU6B4cmzGxpx9ZFbTF.yHJMSHhxpPaLVpXtdoSY3q4ia_heTXqcuai6nKF23Ck7feMvKI6Upfo7dR7Mv2pDgRfgYArtLbEGY84Atz02Nk3R8pyCT6OxxfSRIakA6aP6BrtRSoaIFTwRRFDNIsSy.oYHv93fHpxjOcJGQ0A_i7iK7W85bi8tLiPykZVFYXyBin.7no73rdx_9egRPLRA_QiZHr4Pv_oZMaI47_iopYnmPCD0B1NmsjtGCvSTCsqMCKJ1rtyJYAOdESE3VJaEbzHZi3yhOZ9oyqA0E0CEAbZiH33D.23cREsugghm.bU09A6EOgUPRPXHgHgwebAk0zM2nnA1IUuc1o5K0qK.G65l8pMUsGRyAQaTyNPk6Ffv8eao7cdkWT4IAEHlnqsKUZH2RkaMKHfOULIgcWGTArYiV10hvuocVBmB.jYuSEaIsfqbXtAT9TLk1JR8kn17d"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/b/orchestrate/chl_page/v1?ray=9110c15fb8910678';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\/7248956130?__cf_chl_rt_tk=pDh3ShU5CIbhfzat5P9akHHPwzYPHf.DnfmluEscvLk-1739407103-1.0.1.1-G7UXk3YjUwhTWKDqQr.dBBdG45N8z8Oe22lJScMZYgQ" + 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