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-9487136520-gov.caltech-edu.pp.ua/post/9487136520

  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-9487136520-gov.caltech-edu.pp.ua",cType: 'managed',cRay: '9100e29c3d713b17',cH: '3uZsQyNx7VxrJqOFD1rRgHIU02pv.PnyAONvB1t2OZE-1739240693-1.2.1.1-S0zOI5XACASE2oirnIVweXLlKZv9QGZ1T7zVx9UXteC7YLh8VvL_1FONdZcNPKIC',cUPMDTk: "\/post\/9487136520?__cf_chl_tk=1zWJ.BQ37Z9Oq3Ed8M01riZ1642O9YB.As_ubfyxNsk-1739240693-1.0.1.1-fw3SQbGOopALk0dXC1AZznD0xIOiZeFHXCvrd99Qm8k",cFPWv: 'g',cITimeS: '1739240693',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/post\/9487136520?__cf_chl_f_tk=1zWJ.BQ37Z9Oq3Ed8M01riZ1642O9YB.As_ubfyxNsk-1739240693-1.0.1.1-fw3SQbGOopALk0dXC1AZznD0xIOiZeFHXCvrd99Qm8k",md: "ZzdatulTIl.OE8Y.m.S7CIKnbIouj3sIdslytyTtsrk-1739240693-1.2.1.1-49Bgk2gP4nkBkrehe0Naf7VlIjcUipSyO7nmI8wzfO_RlYy.39oE_jKOUAbExJ3vFmU1FqJfuwcL1B1j03XWfwyWMYEutpXn5tZjs5TFVg.Dv2Yj3gSmO.qbTYG6QAlvxMMpeT8IJShqfQp5a7eFC_OKVwJj68hgauyV2U_QIc3rq9gaZo5kE8ccO002AD9CWpmy1w_eVblI5QHlCpc9Aqwtxp8Wf4CZQ59AMSSahUAZHGzniWBgjsA1B5rAuvPwsqs8NsJHuXHC6Vou6_UFMwqD3ApWd6PubHyZvR6ZZTI6pCu0f4QamuWw.aWPWPI9e5a.ryOz5665CztoGDWVl1Esb1iBv6W6p6DsvEqi4urLYKauD9eCKcS2FeDuUM3_doMm4h8WAqlwh6.FWRxhNrXfdSG3jn4zJJI_Fc9qURcpRlTSgXIRI0emyxjeXz4Z9MAJEAquepdFvbx..nc3mlw0PDncfMgx0nKeCxJwXzpluYccb.TqL9Zj2kQd20qMIgiy5la16Gp04d11dtlhNtRno0Scpi54bUKTNGReHo.S9c5TBqacXloc2EMCcxwDbB.9RhP3XrKWEZqJLY1FfxYdp9M9D1UfnjskK9xNlIfAYUCac8QP.SPcKwLNz2l4lV.Gsta8bK7eYi4ooa6_CkfQGpJSoRahNUgvFjhpAPn_qhpcb4Dm7oQfWEbFqwG3OwGBA8Cy6q8yZ.nMm7VH7JcFvyeUdugfvcyJOh.Qe5RKFAS3x_QmhUMfxv.zp_lh7xiiWP9rUiZA.IhNdaaV7veinsS0qX9sN.rQfcW0Nyv3lkqV4ue7LuW26RPhQC7m_y5psAZ.ETrhmUE4tADeC3Imy9YuI3ZMpvtQosH02NR6EV.M978NUDl8tVWJcRs1pcrClWkIPaZ1CALLyMvP.hM1ECMFGubk2ophEBzVFURy_9GNPVRd8le0968VHjc1NHH.QNU.m1cbhVFTaSAwzu9TJ.Vw8GfIf5g2xCRP1bbiGpLv5QwiVw5epLPymB7Ugz3chh9AyJgIs3oD1lzSOw5nyoC9ZSCGb.FEhKZ4ZHSDJfNi38b0x.ZgEh2mIoOBVngs2uwjuLCIxfLkhLHlApgwOGWN5FSO26._f3CLkdjwWXrw0W4rs9VH2PdOA6xoia.EKy3nn4PsIFAlIEgHYixPKfM0ZV9D3spl7H3U.Xl.A8A84y0Q3psrqHwRLubrM2_Sk51eVC1CTfzcyia0vJidUKhOa8D7s3c7OPprsMo7pf4Z3PsT4urIuB7bn27fJS2Zl1MAScBo6F2nQ9xdTQSuyDzudbmTvS4ehRnWoYI.A9ap09S3x.6LUvjvLUIGZWs5wjHmPeQJVOBUF86Tocpe49V_mK9c7airFe9d2jZtDm3EqKfux24k0PL9uQuJoDV4RrjdoMMcr1C0vQQUVqY1hbsC9IniXBJ5OxrUEsAqC7k_smrWJORHIolMWrU.kEkoUtwxtWE1wn7Zft_rnO_N7A1sBJTKwMq5w1BUecnV9fpE4WOhEF_w3wvC70HN37b3Ka_mjmw9tg9Fnp5fFvAZC9U98hGKDOkHUyaqooHVoS7_0_LBH1dIS9o.8vI5iiDuMBDj8GRTEyO2uRV.uCcCP2IGVhG9ya7gMNiYyAkQ2n6UTqRjZrH4pJybVDsP6jDPa4MbXaAmzk7WFLd90TmS2wrI6Jqv9999r36bH2oGynuVRSI40UdHudhfSUDvj4PluDy6foXg3H6z5K5gqDCSwPVzZg5J_Sl3wJGOv0piq0lvMi3B_A3iFJ0xEKEZp4O3IBXCPW.FUqIu_HIULGJqe_EyGe3u7JhNHjWMBSaisp82stY5PmJp3Vu1.7i_XPu3qdsqAE5RkX7y6f215FXh_CTfL.ffkJC0KD0C2uIHkHRj_AvbZB6L99SEoL2mmwg9.K1AO6f2pG3LfuVzD7z6G8PToqCdHDca5hFMBR8dddBcXvuOzZgRc3BuWq_U49yXhR3QdbEsH5Doji67ntAt1LHyMV4TqSV1O.gYel4jbX4TCj_dsrMzA5XD8_LsHZifJWrxXjFtGdpsn.5eLGKwcg3wJwf1nQU.7E_dt9Q8DCyp9bV.ZSwJOeSv2OAfGwVzcJCBrUG.eefNoP3l.Q4LjyarZKgj_ctyKk1juksdkFCWqc1c0tRAEwjBOfNVOLWoCMa2yNR8DhRh0EZpQL9Kh.9LaQVGh2iTTVUJJKN_qbrG1j_TcbsEuLxwMR0o5pS86hQH3Wa9ZaSHZS_3uw",mdrd: "7CXY.X06MWXU5whDbAfNHkgh4TysFM0E.tgTzceYt3o-1739240693-1.2.1.1-Mmh8XmCCQAvzlErX_uSvJL_KjxHxWipFiRbgUnEToHX2ta0r6Ah6y_3efmgTc9gIDmsxmpubhJDp3Zu0sVmpRQFrhxYsOcP6vwj3Howh_UhD.ZZgzWvuBXpJgbP1pF.zvZyDBRhpgQdX131LuYn5pCk4X90lzdJK9kqENyLJaAV95zvy3wZkep4WCHqmlJZIGIZUV1HNFWtpummC_wE4696L9xDy5.ADW683RcmqDqkDt8yjavVt.MzEpjKh3tkbyctc_illSOuivOzr4Fek.wrYrby9RwkIiLqzse_JTYYfoz3xQkU5c0CzTAGcnEebbuYeGv31JF31bcKXqhu_kUulIb7nFJN6OdFlFXqK9be5vv0_K7vMfg4XKZrUpRNtID3IXNkYkJjiBIXK4QqXBnL43QlwMCL1vqDoSYBxbCFtfj7MHadqYSvZPy.oiVMMzsrZSoSQzcL4TvRv6CX61ioOsB3e3GRJ1dlvj17xztbVnSlljrP9GaRm1Htq3wJSqIyciUoa4JPXy3ApmpgfqoK1uH3BW_zZs0V9QTj5aeirfSB9rdPFEvuoQTlzOqS2bl08iIyoYqFcDHqEcnIQV9cV58cbAoA2h9ODwDV57UajZsZiaG93JK0CBnK_X2opcbrtPNvCWV8LQcMeiiGTS7_uMTOPWSzSHj.8OUhJebMUVayhg0uv51gqA5MDApmMtmJ2..fzPY5wwRI2wLxexxn7mtHu64SYMtTiy2AqQgekzM2iN8I1KZpkrGFHG6RsfJ6mB7hlSRutco8ED7EU11fE67MZ9d_FnzvN2ddztstKFEVjt5R7lEWzpkSrqfINeZePWTnTAniNatGJi4BxcDZYJJF7vCcdcIfUj3gss6IKtrhkLr2lAH2u16wVFs7FIViNtdWi5OBWF8f0_vzyIH7tnL3GW5Lp43pjgAFuscemKkOCEAhnkhMMHBMCEMEQVo0k7acFBvw5lpXlj0a7GnPieAkoRW6I09LJvxk1WodWPc0YFBvks46rAXg1NLsFE2.a6a740Pum.cTtOdMAr22AKDdms53WNiaqGjQXkDA1z8aG0SYbAAOrc2D3JxCYXDP7atUa9664pQXguYit.QZa70ZYCsBm_gZcKwkhPnlzGL8eZGDkUp.ZbDIorok_TxOa861ifBS6nH3E8GwoOVL737D2iEYWFhC.oNkqdPn8q_aAlGLkvYt1MZciVnpnQ1SOEktqOiouh04O5o_TXKwDKiCU2unzYMkHZFrD43l5IMdAolAVYVULpA56doa3pGSh.mIY_H9bm_AhMQNi9k_0puP2x_9f9NCjLYpglOla0bgcX_FIA_HkB6Y9xz6Cf_Q5OTH5i_l18G06GQIXuyvAW.k9U75kg5y46BJXBHq03Kf6cLCDlhi1QH2.Q2CjgDDRp_y5m_Z8Yu4CWdEyb4byCOTcm.tG9hYwF7hBOsQWKdwLMzdRkn8dmdx9tyQAAv7DzFSawPpMbmcSQ1WKNVHExtOtRSPcynF6J5QgbxdUEvsTBaPtqBwrHIg.PQ8LHeH0YEh9FqJkBWtBg14O7ShzZok8whzg661TG40r3hYOGGQQmIj4Ixd2z0E0E6.rUx9uYKvUcjxJsLZLKdN1FJT4fz29yQ.xU4ceVMi.pJt2Ygq2DfxNKdJLJQchkVIS_RbpO0u0OZtQF32PMsK7Q_mzTJKfqtUWBxXoyP9ddSkYqg.JI7FTTWMrdP7Vw43But0yzIgRb5pHM02Z65JAECGKs23GC3pGnJIDPwpfZMnrUYvZYDqiTPOcIgYP_vROfcX3guJ0IT6LOWTPNwIijPSVSCHGrzqN5K92Zv7VTAm0AQzF5GBlrxjZLLdr_.tj"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=9100e29c3d713b17';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\/9487136520?__cf_chl_rt_tk=1zWJ.BQ37Z9Oq3Ed8M01riZ1642O9YB.As_ubfyxNsk-1739240693-1.0.1.1-fw3SQbGOopALk0dXC1AZznD0xIOiZeFHXCvrd99Qm8k" + 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