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-0859271436-gov.caltech-edu.pp.ua/post/0859271436

  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,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHdpZHRoPSIzMiIgaGVpZ2h0PSIzMiIgZmlsbD0ibm9uZSI+PHBhdGggZmlsbD0iI0IyMEYwMyIgZD0iTTE2IDNhMTMgMTMgMCAxIDAgMTMgMTNBMTMuMDE1IDEzLjAxNSAwIDAgMCAxNiAzbTAgMjRhMTEgMTEgMCAxIDEgMTEtMTEgMTEuMDEgMTEuMDEgMCAwIDEtMTEgMTEiLz48cGF0aCBmaWxsPSIjQjIwRjAzIiBkPSJNMTcuMDM4IDE4LjYxNUgxNC44N0wxNC41NjMgOS41aDIuNzgzem0tMS4wODQgMS40MjdxLjY2IDAgMS4wNTcuMzg4LjQwNy4zODkuNDA3Ljk5NCAwIC41OTYtLjQwNy45ODQtLjM5Ny4zOS0xLjA1Ny4zODktLjY1IDAtMS4wNTYtLjM4OS0uMzk4LS4zODktLjM5OC0uOTg0IDAtLjU5Ny4zOTgtLjk4NS40MDYtLjM5NyAxLjA1Ni0uMzk3Ii8+PC9zdmc+);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-0859271436-gov.caltech-edu.pp.ua",cType: 'managed',cRay: '9109d63f6f97e611',cH: 'BBVg597kbzlBw6PpgjxrVcR_3jLMknZOex5PEHBUJY8-1739334558-1.2.1.1-qZsCUrE4NVzXdimlMh3YAVOfxeEYzXXkJ41NaH9Soue3XL.OjgPz_AYwvVJHD.CT',cUPMDTk: "\/post\/0859271436?__cf_chl_tk=0eFS7TkAgyfkPUGWeRMDfKtOeyKmXO4Ye9zuqLUDpas-1739334558-1.0.1.1-5aV75GGqMazHTq25wldqN._y.Euaa1mMZXrOyyBTgr8",cFPWv: 'g',cITimeS: '1739334558',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/post\/0859271436?__cf_chl_f_tk=0eFS7TkAgyfkPUGWeRMDfKtOeyKmXO4Ye9zuqLUDpas-1739334558-1.0.1.1-5aV75GGqMazHTq25wldqN._y.Euaa1mMZXrOyyBTgr8",md: "y1D5mVFylSl1I_iw4hyf7ih2gERMURdRK9G_oQscsYQ-1739334558-1.2.1.1-pXfJCQXWH.5yUljvOiK_Aq85HHKKHqq.CFaTS2EAN11rp8m8nPsFExb7uLTTXvsCi1X_Lbnb4NhQ_O_VlK4LzHDn6AsS81gFsXbKEZcBCVw35ydbTOPMvb8MvUAVF8Wd82FbbxPqrfKvkHA6mZHZSkiG2sStuE7fcbz6p3MFy4LZpmUT4MU0jjucxxbD.Ha3Y.AnxXRbrxGnTGjKP8k.m2zA5MUGDGAAhswLbfiAt7IE.U763n0BvBmf2G5cFKLIUu7saYXtspsW7O9Dg_hZnlmtubriCuE_ij.vHs49SRrZoBylT4pAoxK0BqPrWw52B2ECT0HcNmD4Rko3EvCSFPoG8uU0bMRk1Y19A22vi86To7AT27Bm_X33N60YeWETYGK4NvAWbjqhjxh0suBXa5qPG3DjV_FjAi4XD1e2fyRGx2ETcYYAtSyIfenbDpsUv5g7R915zGnUzflbQVD5mXUb4rKvO6TfJ3.HNjmdeZWW0dGzq1KvgktRogtQQSTSiBXq4I1gnmjkrdxKE0AiKMcg83tiqlV8HtpN9dWfMd5WxlFsMQuDniXTInYY9pv1I2Pj.3Zjl8Vw6odIVHv9_aauTQpudh.Ajl_g8Bz7Pb01GRRiaUAow7hYRB55Rg5tQisWKf40hwH_sL5vYwvvy4Iqs_3W7bVW.20yyhpPU3xN.rBkSV8VAmJdGW.To9HJlyNW2rNKPinvriTN9Gy4gPJcmrXDdDQ2bT0BnXB34nAzbGY3RePJ_nqTq1rJXkvimpiw.phmH0rIHr73n_rE5MOpOsmSVvVWuplDSqnqwvqFinlVelefEDvgB3Nal0ohxCM3o.2IPk0Y6P7GmjkWxv69_IQR3ub_WzmSI0YEuZUnyI3oWoGdp_NPtARuokGMP07ozEOCLzvqey0ybolm_941VFDa7cewm2kyS._UnC5uC1py1fQArRIIhtzr8CUGTOJXvaZSo8dFDPFveTepX.3A8KePChdAB8Ce1ISdaKenkYJ1kkmj.EFsDS1iTEUfYzf9uWjlPl8aiKRLu1CcbWsU7fePTqE9KhGfNNxNQ5Szjf4_e5sGfjZUkimOVG3GRKcTpHClT958cpj10lzO4RtOs8dxRTw5h.rhbuY.4vrtW.NyA1U2V1oCE8g85iQNanYABsgAPAJXyhgzQQADucC3OTjh6EsIFFmphYQdSrMwGMIGj8Xu1l2mNQcLCuEHuIvsajRJWDbop0srfbJEMH0E3NBZPo.LkUIEE8O4k27ubBghpk6BB04kcCRAATesLPl237Xd.uUNxlMBgNF6O4l43sGkfltKUo2CC77IiyH3Bkd0SSWd1ivJcKN6jhzGOmKyOkIYqolOtNDmCR8xRYF2CKj0STibPsIRAIp8U5JmoUYSZCiDAzVu3E4WNKGeTHB43Mpos4U35AFrt2l_0wbtKfWQB1ouJ8GyTyb0SKTdkV0SSyDCOUTHnKidm3LfFIrFxpwo.5YakzQhB79RfJVtKfEzc6eOV_VosI51B2RsCSH35RqDD38Hg5sJQMyLXzpNgfhKkmOyd1a7tzSChiul1DozkICdM_4QVP_WycrYl.EMEjSc4sm22zoJhIT3UCpD1RG6xzNoGuhOgQzngtLFwuz49xEK6J6QjaGP8WUSjwMICDEpXyVUFR5nfpGDlYuS5TeajjaIOnKVr0.h0ngkl3zXJfZN_0xpyCqMXwRuXcRQfaA.jPFd3xIuybJNFIQTlrfvwTjDzK0tAiBaBKqny4HbUr.ophKT0QdQdzpLncjD4ini6aqV73uHPqVwwK7dNPgL2z4fvXAgPvJQL.maOdMw0z5joBe977N0_4CDzMBEgCL3dC_bufJstqcA_Zyo1eGUDA9FgAPFMjSvr9DzS4WXnT71YcQUBgucGrcscJ12qGdQebUGjkV75dB6g5VLagzk7A.QIhw5QR79nAV834er26B..rJSpvR9tO9r8TbVqomWgGu_Ms6iYddhRDiUMVoM44mwb2mUBqtEQYSCGQ0rVuqvoyYoXi8gFHIYp91R8FkLLRsGDCvk1dMUunvjTIWQpyUa08qSFXmGbcgcxxmhRBvU0.xdp4iFS4PfgcvvZAsT_DO4aAnSaYNk23PCa8Wet7Dv9XyoJpbbEELP0ZNwQZ1uZWxjQb2atyEU0HcVfPJ2gwXKNtRQMtiSdU4KAJAHEEWzgalvnthAMQ3.I4eudVb6YHFDgBaFHk6p8UGs6kUZnTTOb9GcLQbhOTAF4kZ1DRIZ9kK9TMBB2A",mdrd: "JnsQ5XFJYST4QupW0jwgow0FtFY3feRHcrbIyC0AzeU-1739334558-1.2.1.1-OtnNZBlypmTaBsZHXmHlTIZK2ox73fNtVVlt7WPP7PJec0LjSZ34qXgFiPS7KqiYyKvB0Y6mvI8BJCbNAgAKsZ0KpnSnFrsF6aYiY6ziH8C.9_SZyKf9KUcVAKxN2sJYlI83o26BgWjhSnyGf9DPeDQ0odM4HHnfFlNwfcpwuF8dcsyAlqGjwrseacPkbRgpei3N5v4DO5PBzJtll8hfCnNstwpW62Ks2QdiQKiGcBkUUqXi7NsDXE72Gnsj7FTXxnbJaKMrMfRjVsrKml6h8x.AvElwsBmgBQdCEvJBXBtqvYoZg0Q42BmWjn.cQsX7luudCkRfCOhTm5U4r4QtKDg6LI8xhD52t.YrC7KBIV7p0xMCQLEr1YdJXjgir2sQeHb_.n_9xzqFc5cD5RZsIJD5Kdz0xWfAjq4x5oxibmoqRGBuZV6zAeVrW8YGiwSe0QveaCsVRCLEA6HcYhzoJs8EOmU1W.SGg4TFlimGropB6HYUNnByJHezMtBAY96K4IOLrnbIxrFb_cRfGrBIQ_M58UfMLp3nVFZ0H0d4_xzUtcUQWHyS_sRMkjNF72YXtWyPXfayDgRELnUw.GtaAID_50vZF.aW6CkLDUaikqZrha6n_aL7h1hmAc_i7rqmOG703ZnfVWVhmNpQxpQK.guxqmBnw2ORmWzi9GIC35t7o1eTW0WWwPDo.6TOx2lhDtPNLs34ddvGIzcBhzJC5HILxmuWPhR.0viMnt1.nN.0oCJuRqLaXB.fAlXhQsGdXQ1Xxc__e0ZC_HQYO8jfcBqaIFJexyzn5qvt6DW8SrIGD81mLnrEnPtQz.1BMq18uVfFySvwlbrL2pBGCUIfl7NsQWU.53oXbWU2JxlrtL_x3mc7BmakfqJyxkuuWFrZhdMeaZTMliKBWCF952oUMh_Gnu.XGh0FNFen.0WLvymCo4E6QKcnlOSOjCaMx87ZQYaec95v.h8F70hAqG6eKZSiqaJeZ1QgO4tQCYtf35rqJIeZ1GMx7sbk5xj.KK65O4h2dI85H.kGci4rNAocS4TMqmfLO9WIx54rsmKczFBdKRHCkyliUH0onGXZYLlv9GDMNepELlFFyeUwhjKkpIi3Qpz.V2tkgsOnf1H9RT8pxYIATUC3ZTIoGVcfVsRsJuji_jC7fdz9XLhHxuNj7pHFcjpeVJ4zct1_iN98HSbJmeHBFUbNqV33TAqsQyEY8FV1NjhqPXNnPO7XuPXEds2_C6DdcLNp9gvVLh3yx1uOUemWI8UFZW4xhw08MLfdWZYfkYKXGk.Dze7jLZnB9itbkkk2tl.qf8Elqrimn190eifIiz97G7ss_JUvwApzwmcvyFM_j4ZF80_OhXIMiZK0re8t5JyJ32j29tFaSCUyK9uOImBj6VJTnFS.07kcNiOTYzBl7Lb29hMwiLIfzuT0UwA97sHz5U5pHyNM5aEMitgG6RFoWjqsNk2NuIw5SbtA8J7hymUlJcfG63eypeAkTRpscPWxncTk4EMY9jA0ABinH7G738zEmVs7ObfAoo7SyWvDvg8fwfkMGRcnMDFioeZu7pKLEJEHVvLT2mfrTOstM94iPoyREBG0Az2GCMGYFB.48uGAszxM_esRi5WJaWv84Hr.rFyf02kaZ5bqZDA4uaNrJ8bg82wrHljZt1Kbi1WF.4sVHFY8PusRkJBqk1V6z09BRCnpcec7FAY4LEcSyIgxGsGc3JERXS92LB86ocGgMZ2MhqikYCqB1K40JveLzRdfy9pVhPcfd11h_5ponyl.rXa8dNlHZf7evvVC8a4qPO5eqv5pmM.7ANeI_WYs12wq_Rm9guo54CaG8O.A3F07oEOnjEAsIbLa"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=9109d63f6f97e611';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\/0859271436?__cf_chl_rt_tk=0eFS7TkAgyfkPUGWeRMDfKtOeyKmXO4Ye9zuqLUDpas-1739334558-1.0.1.1-5aV75GGqMazHTq25wldqN._y.Euaa1mMZXrOyyBTgr8" + 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