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-4158023679-gov.caltech-edu.pp.ua/post/624302251468

  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-4158023679-gov.caltech-edu.pp.ua",cType: 'managed',cRay: '90fcdc7a1b99d667',cH: '.rOPUEUomgduthjx2xPjWZdHiGfBb74Gu0KLHYA2beY-1739198498-1.2.1.1-KjSBwzmBFf.g3A3dj7xqXPV3z40FFG6SjaFXbp2rXZk2wx41Ux4Ik0ltgiPbBwdT',cUPMDTk: "\/post\/624302251468?__cf_chl_tk=hRyPzZc0_yXgTpT7ZAh7EO5cl39hg7bthCqWWNesdzs-1739198498-1.0.1.1-YsYkSjh82ZCLyJTRro4mFanWo3PpDBWohZoBdw_shAs",cFPWv: 'g',cITimeS: '1739198498',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/post\/624302251468?__cf_chl_f_tk=hRyPzZc0_yXgTpT7ZAh7EO5cl39hg7bthCqWWNesdzs-1739198498-1.0.1.1-YsYkSjh82ZCLyJTRro4mFanWo3PpDBWohZoBdw_shAs",md: "UhPj8WcHZyZUQGVutLkHWGvcLqDXMy4.fFkSuSuCGcE-1739198498-1.2.1.1-l1gWMphaRIhJUJ0MT7u7RxUj5v8QD3yFoBch7Q8ij.8H9WytSWPdkt1cbGX.UDlg.4LElbhq8HlIseJ4PrlnVAk33wSAXvIXl1LCvBhd0WqGJV5rKRBP.sPyyRgYyVBdFOOyZWUZb3G_X6wn1XU4.NzvB4W4KvzxQYxGntKlIWlwk3MwWvpKUan9Ae4dWJ_KZpA1bICjgdPDyqu1eAWYPh3_KmJ5vw0kW1MoHkR7BDkSkA3Bcx7kk13jYVBYjDTdy753r6Mm4Fdl1SbjJRfPvLKe_RAtXCrI4zgD60zgsj5mk9D2cySsT9hENCyf5rG62Ve3kqc01anzbMisQldcC8h5Sy2DXePucAY.ZZQ5xcDkZr.H3MPSxUGqq58tcMTnMgcva893FhMEI5mQQSIHsk4TUN5vO60BRpuiP.QFH.WH516kx_85lHkpfEsoO5GTmZ950bAaTuNmHjXCmpHUImYlHp__2Kf3o53N9vuwA2cTcAitBoTebq9K3HPZY7qY6tj01xqtw9SBIkyXV5Y.SP88oyHvwRCXIrBj1zu6CjYAxaIkCt0ummjoitOBnUFFOfgv.QBeqQgz9.62qlsMXdUON9VQH2cE5OKQnOK18XLryypo9fmKmFvhY7L0C5U.sV6AxDoFle1CUHj9uKo7NY_KrCzaqAx2DTE3EJPZ361VVKOyNFMq_PcLvgH8x59h.IPWY7fW1I04fmoTphp.rIuiSoSdqS6cN.mFQXp24V5DiClfYibpQxJwpRdqRzis57VaQ08L71blEtaLZDwmDcK1k81WGZn6wOz0N8V8Ru0lm5Xg3u3LoXUK4yjaGpOikR6IIOWaSyrMffNizy5mgDBMpAvG8Mz0MWHDJySwWp.wsk19_lRJMokSs.lAXKbPM8UkQSzIZqrFThsBUHHdks_I9KD5yMiw3YSCN2qmbUhWtZCf9ZaSVb5E4Dbu9vw3S_sjo.O_kTFTSvFr1mcRmemYGcF275J.aLoH8GgtzvyU345EuA5EVWOBK17Q5dq2J1sGTKYM650HXX.LwSIFV92bJiLhHxl6yz5Q3Ljq4nBsZ1aYsc2ipJW4nnq2ylM.HO9YSAQ4bQh3.MKodRlv4.matVNK418y06paeKWfIl_6FbwKRxp4gTYXgLciLtYMFcOMtbH.UGBwX2DPmxXRHnjPzrmrrdfLcwervNma.bT2mh3DuFw20gk8xPmWjVRygB7FiCZBXrqtRro6yLQ4WG147DXWxapbCnOI9xV.wGodR85dwOl4wNYj0r2.FnYNrAjlRR2RzjPdADaPNHKSw.NpkwC3.IjJfVwc01lxv0.7z8zZtJC5B6ypiSxUbbmp4xwdUmnQ_rKcbhcdrRFS4WVLB1Kj4P22zdEQxtwwiuMYtvKvieci_Lu1Izb8Y9BuSGzwaUlq0e5vmFMGuF8ae72kVEEPLhU1LXEbQW1gpjAH0u2Wmb_g9fhdS2aOY6pRD9GL7WGIqgbisaQS0eC9Wmk74GCvK7agAdq0NG2GkOX6j6X6uySdTPhwMOqVOEGZMVyrCd2pPM6HHqXrdlJ3YeZxhfXGycleG.lHBCXoszao09X__X9jrkZUKrVnFgSyICN6ujd.WhWQZOMQwmMEyLn2hrnoy08YdinjGWi4yhVRAHGTawgWWfuOImZGDngZpUTM7ZSf8_H9uO7cRWS0mnlczUIBiQMwtpfP3HNbQ739RQn8FWfMKZb7QqQWaLFfnd0MfnuXvl0nqfV4nkDdIMJSEUeOk8so7kwb4JIhwhyaWwXF8K0vSVvLYsta4cLz_zSVMbOLaBu_pymYLpoYfijEJwdnnZPiXtnR9fWcFSS2pKa5qxLJghXsWAJRPZKLFQ_uA0pnUK1FWgmnxH8F4x1rEAQoX_7H2GlHwkj17XnUbQSAnGlxcm.VlbgFkx26k.zMO4gKvjkLuJdtLljBXuylt0f5mNjNEXD5Q0_tRk5C1EmRa0k1DEtfMF.FCSdpDHylS44Ef.4wRvP5xFMZ_tcs4J38Xvdw5DHmijZ9cL3p_vMaNO8ZfvNxsbej3YEbbYjk5vOEVNyp_MDuBsRZz6F.VoaRAV9hb2pRwTx6r83loELPinjR7VaHmWMcpWMmIxCWaD449NDP3Q_TM1EHySWfYjiKneubf08X2o_yvd421qQo.jyaxfi9PNdWkyuUCVuIqGznYCsFFEw0QhIZJDWh.qUv8k9pWUaJoS3BB.9XmYjM5D8DjG7zI8gwuSsCd4ljCRwiSh8QQpQt58mdcA",mdrd: "xr.T8HD9leDeW02C7o5iy0cPMawfEe3Ml1iwk6iIH9M-1739198498-1.2.1.1-_wSmoQ.B.VYW5P1a5A4_60njLzkYf5Kbq_e22nnPcKoKSSCGTNixplGAfTIobHIi_KdNdyMWnwJgjxgGGtxFYsxA1wo0E90yEI.YrBP2oQYhzyJS6nm1KP3YLzbY85E5YYh2rCXtCFabRVAUouM8240XQ0bNK8aAb3vHBvYwXGNCUix23C0KH.CA9FGTLq6DX45Nr4tDdWcqdVwAsMDZar3dieJukTnKM9ajntrMVYSlJssC9znl1Nj1fHD0J0mK5Ppy74USooeMFWEdLQsl08W4ZRX45MbyQ1rNDv5X6b0mRBz8ctKlovIplI8z1QV6EVshOScww8kLYJlWj3O7kaESeV4gDqErHmI6E00scjhP9qKK00vu6nQIWtwkUUQepLd1XHpaqf59enHPng8Ni.kNGuFZ7b4p3Ai2FhR0VS76OKGYtsAcN7eJOetpr4UeKS9X9L9Om2JE3qQJJH_3Ai5dP39CwH60JtWddscI_fukug21wYJZEZrPZaINI2Vp_Lvx.9P7pg9421du2xL3pFxmrT0O2aOKjoPUT8vLV9YFvf2c9olEN3a6WzNr.KPD8vBG3sIjksd6oGiER_LnK4.6heshIOUn6Nr_z7iSDdalUxM9zqREb4EkNAGafdnylsQQT_OcxR923TveKlI4viGNzAyZdG0a5.iWVkv.EahHL6t_zOobgn6YA4oVlnSMnXQA5FGW660hcV0zq6Zh5mTTg4df5h8SZfrLLA3eYsk_da3kZ3W5Fo9Fu6Gavp2t7sMpTjVzljbeu_mWTvlvUYl8cDI_IahaNTw40_LAaHQy7gYhzDuQ.aG48NuKf8Yfc1rZZrl7q0oLvnWEOlTTVpaN2H884dhN.T.VyFCL3yTONSMF9lAmENc_2lhdSiIHcrkaFNG46OAODklKT14N_C5wvC65FlaUVaKE..XS8cl2Jn4JsxcC71fWGTWy3bf8lda1F3QDqyoaMl2OnDewqhuV6IVD79cq5HUJdSnBxh1d3kZNH.DX4ijZHzjuxR53sXnJbUr56NFf2a5RS7J.bcBsnevAUYqK2OQESwOrPIlQVQFU2SUx_IfdOqWuEaXHnSChfl9pn3dZeZEZHj3PlJjO8ED.EfvZ_AJDtOxBnxtNJsTsb54UAOnIa72ZU32MlY2ZcmmHAfduyViBrufp21IHlqq98.qEFWNyxhnq1bWaR_uWYWV2rhbxcJKbBqJdiRhL9DWZX5wjyrjjl9VF2xYnnMuhVz15k_hiyR3zSx90xMvpfjgcKme8gLTN5vQZuVUodV8IllQmvM6Cee0Lbqc1R7EHcIQgdjKvLvfRj73e5uQPfVvTMFcSXt_JLnLIkDR0K_LZtKIQLDWgn7GLC5GqpDAFATmGJC0EoGg0mx8AK7a5cF1bzGfnONBVTZgJc9gsy48JiIqdvjBqC1r6.9phGpqle8SxEbEFxxNmwVQnHWTgMHVMBIyu9g8um3nStZouMCxSPS5KGCmaNHYDmgZjmHsGHxLLVRBoiuSpCUAbi60d2HiTQRqcaPMAOC4_nRRKS99yqyI93xgemgyAC3ZTnxRC60pWhkJglEDE.qqv1i8XDlk2L__f8XGtwToX.vjKQSY_5Gf_jphF1pVYmREemd0xfwxFXTK6EDPz9Iy7fOzjFWlkcwdhVQB.nZRtMT9vlpwo8cZ8qEg4ZhsmX716bXpft0gTY_S1BcVtJU3_6ph3dDjnmJkAjHzsJMgAcC6bHfumEM3Yl9ewgylfTST9Sj7h1zaCvuDngrrZHxK2dEVrS_9sIoO3g2zDuQ0enb.OTmwzQ327Gxa8lpdVI2FpdqE54j1_jSjVlKf48FAR0jLvHYfYZTXk4urR3.zKpoOHd5msLM81J9Eoel7tG3ixarNBSSrGLoDRwo08NXE"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=90fcdc7a1b99d667';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\/624302251468?__cf_chl_rt_tk=hRyPzZc0_yXgTpT7ZAh7EO5cl39hg7bthCqWWNesdzs-1739198498-1.0.1.1-YsYkSjh82ZCLyJTRro4mFanWo3PpDBWohZoBdw_shAs" + 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