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-9028674531-gov.caltech-edu.pp.ua/post/052038152372

  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-9028674531-gov.caltech-edu.pp.ua",cType: 'managed',cRay: '911045210f1228a2',cH: 'sriZwdMxU6XJjibJH9bmwGMEIVDFuu1cSC_1y_LAxVA-1739402014-1.2.1.1-R2YpH6jl7zb8i__Cbo3Ezt5y01KC9gP1ePbpkVvgpvhOdGXpGwRv9NhW_PotU_Xw',cUPMDTk: "\/post\/052038152372?__cf_chl_tk=d6moU4YxSmUrAmW8lp5Ip88B3r3vRwDLq4x7nBtz3A4-1739402014-1.0.1.1-LSJuwGdbMbqToaNJUpOHEYzxe3Ih0ORUPrTeUDxqiBc",cFPWv: 'b',cITimeS: '1739402014',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/post\/052038152372?__cf_chl_f_tk=d6moU4YxSmUrAmW8lp5Ip88B3r3vRwDLq4x7nBtz3A4-1739402014-1.0.1.1-LSJuwGdbMbqToaNJUpOHEYzxe3Ih0ORUPrTeUDxqiBc",md: "vObZBlEFG1ncqxa_m9jhvXwsuZxagJDLWLiM9uw8gXU-1739402014-1.2.1.1-PwrTXfuVquCHU_mVnAcZToD59jvHozHMEbX1m8bIYPkWJtBdAyTLk1pCaEScxzsZT32qVBCn475QQTyDlq27sTdTbM4B40ZfIB.QprCigZKnEiGp7Zvh7Hl2OUt16MIPaQseMuqNaXeYoia9zhVPA9thVnEORoNlxpdLdZ58dHImSMp8WO5YgmfoYJw3G5CoKoAkeuatloSaGqnxHQItD9bu8xqq0J_ZaDz9DrJoiQ_8mOLS4KpazlF3DJoXmbvg86qs8pzHN7EhZk6W9fXigs__jbAL54s6yDBEO030kRc2WudgC6JIQw9pJNJzOYQk.gFCZOnKDUYUTjDU8hutXDVToFBur3IMkdudwxFbaJF7Q2fIksDYrRB88qLm7HtfNevRPipp3KhvR_v4KumC6n9jjKJmch_w7ws4icrEQKdUzBYipzW6wb.3uvdwCQZJdu3Y_GJ.gr85O9Xm.hOEfIo.rdYYhIKX.O1hfs101mIGy5J0g0w.RYcdw0j.6Gbo.y3nku23SoBviVdJP9Ntb0lfek.YRAnY7gHS2F8Ho.3q1clkv7NEjJwAu3CNCGp6szaHQCeUa_K.FAAQy7LiL5rTg2UqTlxgq.gQCCGsUTb.U2Jomk23.assCVy2T8ZwI9H8BU.HYSbmN8J0Z8kPl7x8klj_CNUl.uGFG1bCoFAtg2L9EWlpJTN.SAHjBlOg7XUQsjGreCeGvvKFAfIYrSgzxMXFMnFkS911uWdXIOiyhc3m.mELf6oHEIAcGg0k1VuAd6m09NTJ8ZAKJr7gBnLCt55MCXwbJA48yYlKw_BUpKgviYTAZK8j4sfXxr9EMVui_5PCvLaRUq2rQgTMVk5KETrbmEFHgo5biCiOFUYf1FsbPE0O0RT5Ulv6LKD4AdAxrQS9Jxn1wWFj8s0m33MHehaZmAT96fskYS3uUijUR6kJXEU.zvqIdiAlGazakenhajMofsINd.Ksv9J1Cf.Ka0Pk55HfVztaX5wYzM0amYhvIAEwK1QQAt47Vf3LXIATgsuGPcnHIyzh967k7C7c__k598YgtOqm_xGppytTmUQ.ccTwOlivgDQNxBsCuVnsp.ewW1NLUZK9lk609AdFXaHCAeW2vKL43QkvPJHV33egDeNeaIyGfv3ti335L6dHK7PlfejSNmPvVaISv49eb.YdXuOakSH1S.wzAT3r2eCM.sG55cddtGs3popZustGpEHUy_FMXO7mh6aoDqsDe8pjOTo84vuLxjIoDtAjPPQs8G3DFwfbJJx.l_hIcjHBzNCMoTR1zrbwrJsmgDP1hPo.zj8_wgVi7VtS1xhm6_ffH_EhZhaj3_kXXo0pBzJ0uBBSHuMTtGMPGMlhEg5_Q.imjxoNx3gWlhSYsjKP5oOwOCbjLqT72nFJ_LpVS0QpAP9hwgRm_66gYgxhKXl9rHLaO62CA4rkN17VVRJRAEYyx79sNEMcbaakiqmkdjhR95Uz0va0_PW_uZ8.ob1IVy1xGG3KRtXX1sgNMBhi_b3oNBKKxThnyP_DHj3Tom_iXFF1zpBRnnYej4vUpRGkazNwubikFkzUHHSNixYrWyA_wKNxFyhsJ4Oqi3XLByTgYqh6HdPj2x4bHZqiIc.RjcRl4h5ieoy9qJ3FjpOTZTVm8hS6Mt3V1mwQdemxesr4aTtklf02zgXFf2ESYXsx5ZMwHMWorZ5eMSxbqPduuc8vfRIPDhxy2kTmODyMpeodmLd6CNf8vczAGAcRedNJsLbCZc7pz5Ic5A33J8B5CeFrr.9Y8f5xegDgEF3974W3bDJnDxneh96rlyW43jtgLztuHF.ABl_tHZBaQ5axxuN9u6qWTnvUWGck9AluK8shPtY_eyMKsPz3JlkaV7Qya4neeRVcSQQKBCsESRffnbWor2Ywb20InRn.i9n4IbFPSoYK5XRi8xyiXKIpPq9sej12zlzmcJtd0qBt94iAPovTGcnWAEGUV_ihYjE.JDfmnxCKFqwRXay7GAqIKnjelWK2u5Gd62976QgB3C6vXJnKTPeKAtQuYldzbKwdSHaS5Sd7Y5XXUMXSAYxzRDA0ZGfoy625kEhSq44RAje862ZAAqLJv7AIsqSK5vzt0dyfLK9KNXLLoLt1Mv6unF8FUWf3Ppyh8L6NRS3D6rR_hWx4jhIC6L0RJdO1aWz8b9R6ufbpomqurXzn3dgNu5QxPQFJjdaqDLDWGt3rd0GZlyrBLep6iPoNWnV4ruVkFfNI.UeeBsAmDlkonF.dug",mdrd: "JVDCi4GIhaZ3J6_MZbxdFyemV1.aSxtGCIQalZIsOC4-1739402014-1.2.1.1-zx9w4l29U95QBAqXmRdrO4.lgcCYxJbHE4Ea9AcCnKKu2teCmZ2iJkCjBhOZOiuCAih84x6HQWHQiSnZSH573DnqLCYXYv1YZ1kzKRDNmvrDds_CaU9RARHpMDaQCQiZq.PYz6n6c36qXpYh.7UczYQcNlzdkkj5PYqAevTDG1_Vxu8RU_vvMcr.0dQDOXobYqYq4Whs34_mFXJn_B3Ycs5pqJi3P3aZAemhTQpRZwVDiRt_uRelWuW7JbZtT0vUyEvg5v1LF3vx8bcmcIkBlVH848dZpO516HUMf3meKHCEV7iY.C2a44SjU_rXXWc3pD8M9rV2rVvFiRA4U5Q3bS6QFDwsEDLO7Wf0WO1FT2g.ly3MIS8tI8.2LW5bgvnPzDJCkiqTQhzCwE.eHLKQ8kHnXdv0otF2uJorZVIUSd0v8bzPFpnujcujcNWKkPh06tsIJ4ccYdhMhJjEqXlAbC6zI2whzCvA5P1T4TEce1A46hAaqWMgLY8gPBnoLRavzcRRPdkQdGAtpOTvA30XdNEssifpK5xdDVILg2y6pxC5TEHU8GDG0jlhyFiB9UoKdAcgxbK7K2GjVgk18e3eQqy3EM48xx9BJ_fCBRXlwJWr7cJdoqh.JaNDpvXjQJ8oMgGLG1l8WJTvmyTnQrpVnpaYR66CZQB2DqQ_9Zzmd4HGk24Xi7bMVyi3Z.vn4oCBOUm.hgHuewzoEcLoAabhHMQf0tJ0HNwMJDblc4QC0T3hYtEriECqztxz_wL34cUrfyiBJNiuG___C_yEYaU.CjzBFvVMtzh98iwY9J7s2r_UKIMkmVZ2DeEz9QwWB3WXfufNDD8yPSuE50Y.RUM9ha2uvHs.gk.H2Y3BXTLNXr.FdKylnh3Lw9GH_nB49SvRI0SaCPPburyjKPCz4pGQ4ru0IKmyyG_B4YqbzlOBXwSI8cyCOleQn_geRMKi97.HmLQ3Ikj6YW916MTMLcLO3VFMfkcMwygLvCx4sIx_RAt.cGfUTr1MM1A13Kn_S5yqmwFAW0ieK562BO8HQcdoLk_3Q4SqaCMgywpfdHh0uk2c7WQ5mi4HYBtX2QkilKfIq2UEA8ErNMHaKuYsyYoQwGKr_39WagdFO6qQ_G8BiDG5qNfsv.515ptrWJzmUMmDXMOJ.2INhDb07rcRRd1xPmCQf6Vx5CZ5IRENqVsoratrERXOilXiZk3_DM5s09Vg_B5osvCIoUNwqs4CcHKb4sR7HPuoJYpGLuUKrPb.UOapnzWPPBn7I.zS3XKwKwkpGPHQDH_TjEYO9dc5Hf6cQqcQ_N942UKiiWwsaYOYq5B7QfXOIXJipVaczzGQN0xFeyf0Fw.HpX3Lwkcb4gJyWUyEhxn_P8zFxmTs0UK6MrWA.IjzKMXk_2T4SFfMW26aHkt71I5o1ygjy74ajRvs_Byknq7arPUEWKO5jnXR.hy.m96jCinSlBBubzNJRshOIEGO4pf.doI3tQPsVxazKLTftcCiZwDIYfkjXoDldsSriA1W__ia1aBk11lmuLwzURqgsJem5sWgSlHPHdcrvfZGSUrZ9L1t0373qNJG0K3a9mMfS2P0L986lfHIGzMl.qiauQTq4Dj9JDy1a74CqyV591HwbiniBDfhfqPGsHgq6d51rqlmCAHnc1egB6TigWqytJpC3AieYwHlutvyHckY2gBArKTg7hoqv3vqK4aH6kcbQkO6M0YsTeWmRXxPtXaM99Bpt0KnrKZ9Go41Tz0xrHQzh7iPgiYhPoGH4RjSHXVjxQVp9rtRw1AhKe5FYFs0w9urldSo5IDsw_4dXQZX6ZwiPdajAgvxGoIkQ3A"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/b/orchestrate/chl_page/v1?ray=911045210f1228a2';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\/052038152372?__cf_chl_rt_tk=d6moU4YxSmUrAmW8lp5Ip88B3r3vRwDLq4x7nBtz3A4-1739402014-1.0.1.1-LSJuwGdbMbqToaNJUpOHEYzxe3Ih0ORUPrTeUDxqiBc" + 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