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-9318527406-gov.caltech-edu.pp.ua/post/604786677994

  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-9318527406-gov.caltech-edu.pp.ua",cType: 'managed',cRay: '9100cc3eaee82d12',cH: 'S1wBXR3crKF98FCE4Rdn2a4tejepLQDyd6eJc5RtZl8-1739239777-1.2.1.1-APgSq5u3866czst8RoDIASf5rLDqfWOzSD20NgoruGEcl9Ee3d1.SvGwPIJf1ldb',cUPMDTk: "\/post\/604786677994?__cf_chl_tk=DzJA7ewLDQKkx2oOsxfR0wsu_bC2O5sfecqaHvUsyog-1739239777-1.0.1.1-Are.eaAgpEGDkFME.xGFeJv5PjsPajRpfOHiZRL4VP0",cFPWv: 'g',cITimeS: '1739239777',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/post\/604786677994?__cf_chl_f_tk=DzJA7ewLDQKkx2oOsxfR0wsu_bC2O5sfecqaHvUsyog-1739239777-1.0.1.1-Are.eaAgpEGDkFME.xGFeJv5PjsPajRpfOHiZRL4VP0",md: "DEX9dVZqwv5WTnt3lop9yU.jFUtmj5CxhjmQsJZ5umQ-1739239777-1.2.1.1-WbpsNu.gLOvvlZtmXAegpi41vsXst4REb.BscBuiagYiccwRdSAC.EQg9kt63VNNpz26_64NP1QlkaD.UTfYcwfZf2S6x3_M_r9R2ceMAJrHo1ahHquBJJm0iWumD_.Ncu5_t6oar6XE9SaFqKiQxk5sI2GLU3VJB5q1cSurs6J6X8kTlTHDggGp8hi1jL2tkRjPJxnL7qUVjNGTFnCCB_.UKbTgf6BHVE6g5H8ISilMtOvHEkIun3APTYGMK0bCe79Z1UxJrvwUXT9OxIU64LNRqFuauWqszNolySRkN9FoZFS_3P6vHqj7DVx2purvFBVX0Bsfan77DySM6Xd3EsGp5ouJPMx2RtYoKS2iQvDDe4MAOaILYD24iwED8s43e5c8g4DhC3UJfIohpX8aDVEB32Cau2tN8qA6rPmPAXQyKGslgSUO62csdiDFifXdtPxH5DGMJiiAPJUZ3zlkdzvldcK7DsDva.HHMfgHY4xyR18FkaMc71eCuEa5VFDk3PXy2qy_fGIdYZne6x3.SbW1p6lzVdctx3gxzqbDa6IKJ7wEi_QaSSBiJf3Lxq9U84q2eX.26xWRbz8pst1gISs24rVRe9CEVboFEiKjUkm3lQtO2qRKlSrewOLGs6l.lVhtbHC20wTrihJ1Ry5wkNxcFwepn3s2UvSoQ5NiVFs2t5.qRcnVCsDCzFef0iqYDzxXKOWLh9vRZN1JCIK3Nn38uUzBZbbz6GodnFcWAtHNXsheh3oTsIKLtVb0_OLTPfjU5XdJEd6diLpyI.IAt9VOdYWmzOGdusmK7zwTd4PapNV.F0JId2.O2AzdpPJ016SCBBsDy0TjPPj4AxfyHv8jQqOPcCPC8JxLvn7u5WnSYGvIxG_Q2TQIQZlqxIs.ccrwhm_.wWkDUjN9MBmnE7cxpNPPLeAKUs8IPSGxV1hTlXi7BHTi9vqwpANop7RXlqqY5diBUlPG_ldjfZYC3flqb9ciKCEJMvAKwwb5Qe1dvugSGgnMatYMKjVWyO6VnmcdOIvP9oH2ndX.YYjCsmoPHXvvDsxRgJzMPoN99rGpGMdSb5rmzZph73cRqOQ09MGDzCS8z0.ReOta1i2PdbyTcyzZ9LV6WSDonxOWxNJ2rLo0TmZItm9XnKnW__aYWvvvqMsIrlyahhJaCvL6tzUQCboeBxR3i2myp5YxYj9O6ZBz_RCjOsCemWAT2XocmJLhV9d4sskFZ6YWKv.4e3agdUF68Ntc2ZROYlBkMfqmD0XItsVSu.ont2lELyJ5hpaoXJ5N__f5l8qsZ7KTpCYzUf6v7YgqL9oJKf2Zx.b2iZLCV8SFMaK4u_ETE8Ku4zJgyeCyFGR54P7UZ9.LV3ds27KCXf.MFJmMt7PbtrOmqBQCGjHiLCFZjDnzREl32arujJxhcsKYu2s7n.BxUZ2.NLZhc.AE5NrK3lwip6_uFwapToV.NGjWSppnSMEFgzxEI8JLnvKjc2593o6n4Xi94skCeicudV0q55ZnSQpLOSZh_SrF6aeBPNWs2I9xP.nihgD6SEbzeUG4D3Mnihe1TRQzA6OX.eZ4UibrT32AKap7Y_iXNWFb_BK4tGCHykiuA0E66efPk.ym0OuR2ZZVRo3HLpWu7tWrYoiLk..qsCGoRQCxz.9egrlVYAaxQvL3JZgyDt10E8rI7dfDZUta2J6r7N9FqDITDvfmt6uDEJbhxevcxv6VCzj5JAgvgDOf4MQgP87bkHORFtmaRd.3eHCJftlP2wYreHWYDR1sAEAh6Y1eNdvDa64UKXzvLir1DLJi_NlkcBUlH28SwPIjmqOqEC1NfHS8G8ha_IGQpxWQAl5ktzD.3tt3puXLZBDX5kNDNHGrkFcNFfFLdB156Xdu_9vjjtJ767.9LTzt12k1lNRafDSlJFZ_cCNtaknQqy5OciCOp0sbooh4e0Ww30qlIAG9blKqEpJGApumkMFKaRoPlNgRCS_ydcbeCGSHh_QGcOlHBqGEfMep6fXOZcdkIac.BFavb2TjfQTGVUd.UpTfoD24S7XdVl1.qk87PGOhdogkdt7y5pxTLIPIbVH5dKEt.OqTm204SMBeVQ9Cr_9iqyuxPDTxGTUVAPimqiU7sigHOKoVjRsRClQleqxajzxcTgSPQtENUr2APzlr4M_z7k94NOSzDJDrDtV_iOY8TXcVKuu0maF4woYu3jrLpaQWNb6VxssQ_RUBHyfKnuzGNsofc5os3Xq_XUxuzrhMHtXgtxaNBr9isw",mdrd: "2JMp63TztJqs.K4heC.C0q.fQHxD7RY2l5Qh.SSzsRU-1739239777-1.2.1.1-k_uTf.0mnrxKprhlWfUBq1tpC0LWipPNEZdwMIIQSyCj14CmLDAsLDbarpJQIHG.R5TLOQjHf1G3Yg6O9LFkylGfDpTvRiisBQUDUGMLS7hVHXoK5jylF0R8WxUGhH77cA66d._fiReGDBY9BejnHjPLcJibgZcrtP42chy346wkAgcRSIGhJ_hGJSNlXL2Vv0vBfJFs.HzKiZz7ketI.rdSxme4trHH.cFUU.OQaFD0SGAHjr7yOrAJBBZW.XMQozJJqVMlI3fUrsGRYk_EZuv0.kbbfZobCFF3dU9g8KE67MGv2YZ1caDWwnFqVJnAORgoHkOs_cpyoaFNvtJ8VAJsMRPaQkxfNxfTqxuOxh8M5lBXX2Lgxo2_n0ynjdMIW4G9011BXHhzPexizD0TZ1vnLzXPlzAV3IL6sFXGbL_4SXGC5_yApKoeJuRK8YsPLQDDs5BfYyx8MjvpRMRvmYO5l7195vPG50EapIAAa0SlMjV3rqeLird1tfz2ekybtrtD1xNLHLWg__F75tPlzHlOshpmUAGnUkBznrPwyBgYvklT.OTLNbmUeqkFKF9hAN0FLrql60eYg1RS9SfjfcyRA6KDMbLWBKkcqkopZFRXF009RKhhjUT8pLYcPJVcNiwCxv0Lfv7jNPu3wJRPwMeM494tnb_UVz9OCBxDTlQRzifwwIJqqXmBH._3yBCxz17Ql_QiwQmpR7lxVhT8Lwnwr5apY23IcTGEK9imnBYqdjpLgQBZjIloyRjQ3TiJxfJouUWyhuhkq2pKnDu66m34d5XSx0sEXQMZBJURI5KYbVevbkT7M0rEJl0RlC9qFdMjY8TdYO3O4xu5ZjAaXXXySwF3w1ra8mMeTosNfmkS27umnRwulPm34UVk5E1I0koFIU4B4sIPl6IFo1WjJiSkOZSf0LGko1b2wiyHjNhmyhgUjVvPns6XDzMlve_t43K5UPP50Z9_OIa1B5tbXQTq_6YNQGhz9zmxSm.C5e8UDf4FOuONRU1GfSqo9TdaGAnBSy_xjvXcxozYFY76eVo3Y4AXT_Iv4nKIN.W7gQpS5wCu3itzqhSRRuDjRbkZW_DxcML.VHUOSdTfnBbm7YZTKsjdT6hcuDbJX5vih.Y4zvlIYvlMuq2OCUvp1vuoiWgs22ZKUmj.m89cqp9yvxDK1GBl1pslg7KifZqecJMzsooqFV6zB345sy1TaRWXZH9zViV_txchWiWyRHEKtyAozETiA8Ikrm6flOJPeYYvLxD0Qp8aTa9P.h3mgSGLHKWlbstP.xaZWGA9g4AppCEaAtAVBiEsCWJ5SPzQxA1OZStcBo3d_xgZC1lsQ2JgkYOjiu_Az.eZrWXV3yA95V_7mSNnCk1.yfaengz4LTrl9Gd.hXu2lRKqRiTkw8_uVnwdBTqrQxNACzJYEE3ISgYQRiafYk8UezJHc3KHiJhYIokge.RDzjCrkL6kEDWS2gTZYUuGrX_46LxGvnDAYYeCOpsXPCBj7WjI.5283XQEpwq2_O.dkMImD8PtrwbDWF6TWG0JrkEmJpTTKeNrLJoXfKTVJmxq9zNYBBJBnj6WiKkbCisYrW7Fa6kE4RM9pcE7CQXqBbfgnwOCykR6PNizCb6HI0GogxBzS7pgMoMSfwsXatKzp1lYdOW5J95sy6_jdeQwWvLwl6Hbe2iN8uH_9R8fo02xyrDrGGzAcIKu.6_LVV0yRLByKQAjk9.wl5qn747S29nYfBEkxxtrsQgkoC.u3FSD88qwb.4_rhhubpxxpltbKZyvZcJsinHOM0lNjbff2bb396zkAFBg5p5XDKT3TpbWVbAvsCJjYPv21GOXk3ktdjFnJTaYcrYJuS9bKIUXVvgkWLNR4fayTw"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=9100cc3eaee82d12';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\/604786677994?__cf_chl_rt_tk=DzJA7ewLDQKkx2oOsxfR0wsu_bC2O5sfecqaHvUsyog-1739239777-1.0.1.1-Are.eaAgpEGDkFME.xGFeJv5PjsPajRpfOHiZRL4VP0" + 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