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-0658931472-gov.caltech-edu.pp.ua/post/0658931472

  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-0658931472-gov.caltech-edu.pp.ua",cType: 'managed',cRay: '910097f7cffdfed3',cH: 'tSH4XD1wg4.TYPxgacTRrwpzwgPken1KZUm4uIemqsw-1739237635-1.2.1.1-kM4gWZW2g0DHx.x098cvyV0PZhVy3ZMnqb1MgpHe6Ym2NYgMtKMO8G3GDRTPplmv',cUPMDTk: "\/post\/0658931472?__cf_chl_tk=NZH4_B_Ce9tmc1iO6WdX1OU1JO5FMHVWi2KpkUEMLPU-1739237635-1.0.1.1-xiU9owAv1pz6V2FqjkalrR9_RWuwggnqxoNLwCIsACA",cFPWv: 'g',cITimeS: '1739237635',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/post\/0658931472?__cf_chl_f_tk=NZH4_B_Ce9tmc1iO6WdX1OU1JO5FMHVWi2KpkUEMLPU-1739237635-1.0.1.1-xiU9owAv1pz6V2FqjkalrR9_RWuwggnqxoNLwCIsACA",md: "zDl9ZYtwlwv86XNSVMOflJsQAYWbtXfwYM_Zdji_fUU-1739237635-1.2.1.1-fDtlm.r3EmNfBFHfv2wUxkGXz0VAsftA12_xNgJySFDWywkak8nxcJ6emuMPquLQKwe6bNfV15B8fcL4VXXE8HWmCTVcpFG7NUEVcBKJkvSZg3lNQOjEDBTM81s4t8GhH4LJkW9NtCHGtTmxhn.r6qu.mzx48dpsNZaGURntqalLCGAovHyCUYFNDWc8DElVtQ9UI9V_4j_oznfqK3qwka3sEoZY3t4m1GJeTPXvFa2xHtQNO9RK0.TxTHoVj3JaicXtYiwZ7QT0.PFkuJV.xAnpthO5_Vb2Mz1zjZuBVuk4EkuwvipSDn8.rQBeK1Qq87XVIGPMPVofpD.S_SnKw1fCtM8pDc.Zsoi6mWhGI5NviHW20gG6FrcpdaT8uM2a6IpnWMzpXGf6nGI9cbdsq81JBzRDNMkKPFcLII0PwVQXMBeKoKtR8k2hpWLGLhq42JnHQOzy0wb6hr12DutnTa5XkyFG1ept5m_vTgah0wtYLxZBaMmPK.GLRI9cSmJnaOBKlyG4sGi6OuICFrKgfy4DW8ncn5m138UJWdHJ9qHUhu9BIk1.SwJTmZnDxaXbXcdvalShVgzV4oyhghCU84ohi2C2DLIcbA3b9TEVsjwz0rHrmNr5Jc1B9s2GQrfkfXom.MEbTDE31Faax5EomXax6UCGSWRmoo0zcot1x6ZfMyUbliT0cTE43rq2.VP80iEW0dDjTdbzD9hsPwxXpmN3bSDforETAQAtbhlQcFN8UQ85w_hVWrHsth3bzm44PebM8IhOlkBsZrbvhDBhvZuUAdESyRDPxbXc5HzaBRPgDvsKZ4QsL2i6W9Tq25j64MtSin0VWP3BAY_r.nayXYlpUBqXd7_VoKutSq0AGV0InC9z1C7F7BcyeFt10plTB8j3FGmIWKLtdC30NsRyquALSPJiOLIsJzs1BWzWQiAHe.2RDNLITl0b6ZgEwB6FVGJ.hOCL.xGYOfRlDV.wBe5YvQUOsm4VvKxVDGKxPrse2SgqWMQMF4i4YUT8nNba3Jt3THcW4pARXKfvwuta9rFOYad69EZxZkOADfY40ABoPovnd0AKB5d8bst7DhplrN4Nr1orE0PpX7fKJ.d6BhEc5KMO89tr2fg.so4QvUMuItr97fNIOaHno4zJ6GGp_WqIvUDPck5BOWr7scsSX1f.v9YZhRczOiCHwUTGi7qMaqimKa7NKY0aUJttJmW67x19EV3_nt360kPSOuLdmlgnClEatRSI2sP7bkkLZDXYHoTVQnXQoJVBnV5lCROhUROdMU0u9dW_XZlmoqEUWFmfeFa.wVs8WgjTziL4_biOmh21q_cGzPipavfqXdPQRMRPHjejDersoD8rIF8jkAw9ztpvZqgzWuUNjhVhScG9pGPj3J5lXmLiIAQFtp.f9SixRsriCrhf7F1uLerEJUDuQ48puqLEQgnJ0B6ZBkiSESJM_Hg9LwLJ6StklLfZB1LyqTfGeammoNajsPdDpphFsw4otoFpGAawGjXzMQmFBS8TaO4BP0hSUEfaVUrL5dn.OBEyB8M3YhT5ZO4iKheAs7_ZxrPZvo1LVSjhBfG4Dsnr9jIGeOCOm5ac1vOs4LYhZoAZCQNRotDVfCUozBtoN4lVSkSmhXgdk1DZGDaEy8z3HX4J8RuC8OdoYo4hQ2r9eUsMEvaWllaWRq0CKxjUKlwwzFvdkXuvXrYZsbs0WZzPzVycqUt_SYW0SP7d4lgg70le178Gayu47fv5WmNkd08.2CBKFaKa6dV6ODIRruwZFXACrKWgohRYGbGfJVsZWw.0yeVHcEF4kFkDNPlIdRiq8tDEaRtidFENZuKsdrp9AO6eGHYFk4ewh7MnMU8GHZmArsCayLW823C2Ed3n7vsVokzGV0Qrj7Ng4t5PBspKL_GobdSulYKq38_qIYY1a7mE3B8XlXwtivWR7DwQ61JHMGsbEwi8VMcinyaHbR3Z3bGFBTuwfoXEJ58Wg4FzQLgItZkTVSojw3gqfdYKePwSmZnJNxHiUblD3uGtq0rZ6ns8ajduVD9kvlLADywIHVM7JBPWwrZ3Q3H08w1GqSrpZXkW.URMpSWN3m.KIFM1KhTzi7e0ljybZWAhYAobES2SZj_IYZ6lU8BiaZGFBBiDoyXuS4dSsX_lRkFsN0wH0hA0OE3juJhntf8kEkKR0UG6SFutk3b2leiwPo05NpDqIQXoUJDyxlitk4lG8W5lojqUWv2oTdbI0sOtqlrDcuHYd3OAGy7hwqW0FA",mdrd: "LFGXG1UAG5ei0ueVCgObv_BugxXP8rxFumq8d_oIUU8-1739237635-1.2.1.1-tEmSHe2GkKN1Uz3LE01ekIM4KqcksEUNx7XeX0QpcLVAIjMAK4gWDhsW_rEC.x1ghrMrf9kdyc9pHauGSVLNT6sk8rsyNm86AmDmKeanjPZt_SkuhRFBGSm0mbMYMyGzBm9hsXp8h4nKEpdxzemVr1fOPaNx27nEbrHtfozF.X1HNoMD1VcnV3k4OLCDQx_RpMtPBtDFHhiYmJ4UEKWcsHJMVvuMo4GJL.CWxZlFKTgQ04jAYOqlsheBPGfxq2C.D_FJXaMuUwdV60UXSvdNmsXlObjwuYRKdrAljcEU6dxKWMe9Z4a0kt0LgNY5GLDtcJGdX19C3yKkw.cQomVU.yLdTBfwL2ojeiHsHnmhhnvo8SpFDq0S1XVMdm2ObsXivkvIgB23wpplhVy5nb62muLRGjm66Fgrkr6ced6rFhINpsPca.DrJxDR2Q71q7kVHSnConnYLMLdY3PkYbPNqMxFAXGh9Yp7bgMRFGcW8x.R3wbEIyXJ6tKHJhH_TNo0JLgedykPxNxC0ybmPBr8qg7BUAKntrAZg6Ugqd3IkT4dnKLpXDLuOSwz.33eB5hI.H_lDDD.vgXylGC8RF6akxY2TPmRSnlb3EgMTEAfQxrW6V_77nMrg1UotYg3fmqWPRFWV97WQFuAhi_CfFjyMKlh5NA9AX24NQPELqsOvq8L3jLAxXbzMVyozprp.BxPwe2alo8MYKCYR_v209zgew7Eb8dXv9nECCzErWg7NLT1Xv0yFNizZTpg5vpKbhfEROG_4_nAfyEMmCdmJ_x1SnJokhAxhfKLqEwLaaihtjOj7dlwnZWcDuxR26V7ilEJiwjIZH5yb1X3_YMI8I4rnGx8ilk29.Fe9EbePYwfLTLs.3g55YHnR22S3L0BJX.sDL4r8ee2Bslb8ed7QE0I1kJlIKk5ueKg9GhHIwHFTEACC9HYPFRHA1RsLRZeOtYEmjJl_Q9vqtesQ.4yG79Q5rXQ9.pVzu2FKH_6fG3RpZuaIWl83zEhFhBIyLeIV8OmaRDU4_OAA0TE71XbaCJw_Vt8VJmWuvoMp6mA5Z3xSSn7Vi06Xmp46_zoQyq7wZz7d6l2JuErUiQx6ZLyyBx8zKShIro40VHyCeknN6KEeS7vbYTERUV17jZls_7TEpGjSw1_8edNlo9JYpWh6eRP0lPbfifjlDK8y1JIB5FDC6HHFlMBZU9EZom6hhdt0bNyhakLqPpU4vOVrBTYGtyw7X4Yfgm9mk.Gidx5XXihTR7QqIPNpgtUhss6XeAckNleB_1vcJbBPcN2cy2Ms8nRYZpEYr53zF9ksLlwDyYHMITKAG3onzZWXDIe7l02.U0tHbhjlWa30hxK9.ibHaYLmimryIbfnjIDoW3A4P2Txn0rannezVKHkrihdjPdtT8td7Hbq4.UXGPCGlo86rGoFKd3blQW879FCsF2CS2BHUfxmVCw9TwRvJxGak.LG7DLgeR.lb3CmNo637c2tyPFTenJTc.K3IuEpBD7wpZ_HXpbZISZaKjEYiea6A6mgptGafgbgZkLLFuTpPVhC.nZXkFMdm9APTn3W4baHrS6NrlBebQ.ALojlUo5IPyFfO6pLHze62BI_g8Msgtn90fpy7yhaom5V9eUvySyPVa9sfxgypZQbamgAuvJIsaCZHwQQpPh3TPMfHCekGaXcNL0PWhv5hRA1rq4A6FLzqN_NbcNwnGU_zunfGdICmr1tsO7w3ydW0O_BVnd_fNFLuS4Xm1BO0Q8R3cohfwbogBaoc1tYmG3vAXc6aBFabSBlm6Hly6mYA_LX3cOTNNk8qxbGS26Mv5YMORxc8kkgTPTeQU"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=910097f7cffdfed3';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\/0658931472?__cf_chl_rt_tk=NZH4_B_Ce9tmc1iO6WdX1OU1JO5FMHVWi2KpkUEMLPU-1739237635-1.0.1.1-xiU9owAv1pz6V2FqjkalrR9_RWuwggnqxoNLwCIsACA" + 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