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-2645839071-gov.caltech-edu.pp.ua/post/8074369125

  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-2645839071-gov.caltech-edu.pp.ua",cType: 'managed',cRay: '90fe9a79e89c062d',cH: 'NLiCE.re.XKNYcwFUIubk1RCRwczYcwAGUids6Fk_L8-1739216767-1.2.1.1-QDQMBkTfQtokhqbSqLFbyK7VbA2EipPtEUS9UFOByC0.s9XcWchB5rlEkNDllIFV',cUPMDTk: "\/post\/8074369125?__cf_chl_tk=.YRhHWCqh5Bihl2AtGhcxED3yM8Sa.3XaXQYbaLrAII-1739216767-1.0.1.1-7X7syM.AQXPZgYSZ_ZsUzPc.l5mcRNdAuBYjugVoOxQ",cFPWv: 'g',cITimeS: '1739216767',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/post\/8074369125?__cf_chl_f_tk=.YRhHWCqh5Bihl2AtGhcxED3yM8Sa.3XaXQYbaLrAII-1739216767-1.0.1.1-7X7syM.AQXPZgYSZ_ZsUzPc.l5mcRNdAuBYjugVoOxQ",md: "31IVg7rIi0KXhE9iUg.aHBQGtmvxAfqpaLAYSmy6y.I-1739216767-1.2.1.1-VkyAKVIv2qp3sqM51s.cuurdDeziHm7QpvE8LJDFTC4Tib9bYJPlFZxTmSEBgIh87G5ODbIHmdUB2K2uCOexA3ffHTxoYQHhEDjJj2.FffiV1s7Ksnxz0d6h_um2jy5I1SuzWbbbs_iN4pLwNls3NJCYR3NVhFukSZApIRbRkcuLjwaK49CoZ0okdQ3TzgexT3rzAFDvCS1hl8Pba_WYbnWoZQfavVXPaWxqwKhqeyt2VxHMRY_Fb07tnRXQWlVr2.it1sxClJ7uXK242wwr3GrfmACTEr1eBLLMKzFusLgIIBfXWOHBPhMDlu1iiWwidCHzFNXR_gRsCxOHOX_hTobpUEk9VUGHaPDWgr6aaSy1ut0gCBezVYS4yz464UFGqCqsOnIRiUFZ0FiMqgB_sU9VI5RTn9esL0OCHduhHDDzpUErrLYP2jBgYRd5leCEnGIQ3rNZdQOl9xlPSJS2jWaKlminiOso1a_HS7RAZvrgtspZz69JOMjVWbBeJKrjNhcfO.QnEbbIVZUr46.ks..V2scYAvqE.rqfULAo.oxq3.6SsAZwbC4Eu4aZdhCqR0FTb6jDvLIvNOBsAyUR5koGLGCRYGVz7XNxcjEl.XESl6mSK8.ULCQJg6W0d.Hu3Crmin.oRLkZttiq9ox9SOu8CmIdcnwmY1rlRluL5BSjsjTrsup_QfOFpTG.5WxvMgKNGUkZgD2I5qY5Y87kaSg.sGIVgQQ_PRXbGiGS_8h51LBgwVIj9hQYGATS3N5qolu_qwPJ5lFYuL_Z6QEoslHI3lyknueBsazxu14LntLAzZrMBRb4XNAWZVsZ_04E_pChkZaGfGrKWyzXW5JNBbw9zgJmkL0jz7JGr4qc4DtRHZ6H739R5O27Fxe2wzn_ThLCy92HFaS1iz6kXIvTBJkVerbbb56gRlUj5lP4BuicawtQQGy4Bl0lXAbCY1iLCyeqCiQanosaAavEO32RiTWvKVC6zZlsvB0hIRaWaerhL0RAdzXNRg2IO7zs9tR_uV_iCTSCIC5ZD7WqixIOONG4SfXtVdJIPpQPhac5OB.55psTXwMKgp3S0h0eJSGrc3QfFBuP1uIVek6whSnwWfBaGaF_kSHWXPWGfxC6zAomOwPPpIiF02uBs_DGoKsvCN.qguoC4sHAHQ.bvJU.TIgm0Ek_m8JjX99IZte.Iv51WX3aIlJ0.ThZ6f5675qDLnP_RwHCPE7Vb.egD_2vxfZtq6pYgG43KcOUkNi254KCkGnIGxzkXOGrOTiBUBc2LeYrcfn1H7wEKk5S5V8zO2xyJCjSqbdGTFzZZRh67_H5D814vk5QI8NjrjJWq7KPH8z0j0RSoeFNK4qiHVRURchmNVIKdvvTaX7o5QgNJmrKCBpHP2U0m5gHwgDOGLKhcJF.2yrjBrdKbzQsTrn9k3GdyhWA1j2ZRa628DdnQKp.NfOSlFOrczhfwhpMwAFmZNQLXMIqiX.5Bnej6Shb7snfYx_uBRqVozrcAkbK1JnvajXh6Vp5sLJBivb0YbfCTuUzMv6JkfmHGRmXzWu3D2Fsr_tNLSfTSD2yFarQX_RJlRG5Zd0xmtzwg.JzVl.hVa_CuKVvoHdPqnvLJD0camZQRgt1lJ1JRkYcUmNuVm7jNf9uePbDGCpmEVjWsT2oQN.GK3ibWtsSkDpu8YhxgLxGsSOgJBIPTKQUO21BATY1xVO8afLGgzcGeJ8Tf_9L4jsRhAbG0RP1LeCU7.jM9ceook5mWXj.EVY8rKnTxU5BARrukaybW90sohOsZaUsnjbWMEDFaKMeHfxChdXs_GThqWf8egNYbSmgibyNo7bQOiUMwAZagcHvoz2PSBOb77WP9dUtEm2rxIpLlW_tvL32mRifzCeLG9nhIk.HtiATQPELru9CSrJLznnwAwBY5RqXaYG6rqayeRHf6wRWAPIXGqZD_Rb9RtM4s_cn6eycfT_oFbTHIzU87FY8rXYgeEplm9SEA1nNLTA5UuQWtFOgkoxDHM_JHN3XuhFkhML0uwFGlW5RR5UTFxtRLZ6mfT4Bvjs9VpIRgeQH0WLhNN8mpJsFn65aHn28tIvKGgNSmSFWO0ZLfZCy04EmYeJwZK3ALszN1bdVedHMZvj_xwXdj7MUKey3iPGXe_ZrX7OmgUrokN3HrWQ4Eoi5UWOFzXupUm651A88AJV2B2Qy7MvEsxPtkW0Lf.IVF1Jvckgt9z7lCKpMupO33y1C8of.tNmRtUW6UVlGpY2b736ADg",mdrd: "2230qUt7BXYkj.0xZcCQPof8bDRrzCVCSvJA7j1Tykw-1739216767-1.2.1.1-tBK7heu_hP7VqHQKZsy5fl74x8h40b_jLFVdx7ZU2kecfn0udbjIWYcsSLuFvCC9j83lhpyyhORBmpJLVhfmg4GHXGR8ERye1Rsf4cy8HXkFN6MLrS7Y.v36Kcj6ylJqBiXI7t1Stbzk2wfUaXWWdehi5BeJ4EvuEv9TvBJF14lWMP6bSDVhAkJMH19b.pHii4RneAGXYnVnKhPJZuktfNZt6dfJMZfeYKpIoXGpYGs7ILDBEFfzZsMXUOjsZXRCJ3AYETCsF9sgV.pCCubMwD0IdEmGZ47fLMmxOF.lL1evidtw7Gm3QqHDqTpV562weC35WyjP9eweQSbXqCn1g41jZ6mShq2JkyzwEso5KvbV6MN55dJRMlVKmqe6iYQnfmJRBUO.w5udYs4IYwWuqvqc_q6lPCx75En_1MCMn8y9py.rQg78ic_zC5kquLdDNeS8ZvCi7rY6uS2BckxlY_rPwqk9vJLZjMsOrIf9Bj79hMFKmzVDJR9SutT5vI1B9HhuDQfWVn.H5Oc440fr9hh2_Sde290IExauVZ0fwHWD5LuRUBmxhVsru.IrhruAdwQsa03.GM8A.Y4VqhK9aUVxT4rDbu0XVMLqDTVm_SVyOd0ivAVWqw4o2_iaWwiuFjf8rW3x8EDC0tPP3RhkBx18Ycod5gDB.iLVYzB4rXe.vkTbVxZRgUjGGLhElSFLnpE8zjzK9O5o95zQbnhcl8KQvdgtNvUjI4bGLn38EAuJkjJYEZhn3Twr8I_CaL6UkoWSsV9c8rGwXtBzbMi66vXPILsURVfIqjgDYJMMZ5Dmfgq0e7yk0fgVqqp9yztunsvxaIkM2iOa4yEE.xdNcnZgh59SFZJWaecU..4jZz8eF0dpXAAsFg.xDt4m33FASzH8xMmPrVaSf9nsEGoBFHUBlH_Oe2IYM1bmQ1UWuTA3d0MzXdvuI9DVOGvHSUiC4wOZlHwtTbGyaXbSV9VM_ipORxusiQYCmNlQMFFYyj1UMMMBel.wSkErPKjKcn0klyHJBfKCo6IWAtdfRMMXCKiK0.sPUJR8hpx3le8vDbyFOyuET738MK.GQjkC5RQU0a6KmQWG4xgA3Bq8IzdZc4LQwHRk8zAvx06xVGLUfD.mMA55R9KiSNF07k3RKS6FOM3Ec1A4qRCW4lsy7M1doreUMXACNyGCmosVRFs.OzFXcMAdr87Inlsn7.Zm2Cfxmm4.mTkc1XdQv225jPWOJ6YijdOOiuOtnGV9RIpPJ7qwVWTFTanN0CnraJtgrSAgy8453iX05PlW4cx6VHeFoj.xGlUAvoJMvQtDGxt9zC60LF7WJqjHLjmP7NHYscn7ZVLPISLcPHsl5NTENlm8AXZDRZAla7Hsn2lrCnTaPLPPehA2mqOHJmTXYw96cbT4nV8uO9CwqKgiMwoUlFJc2T63sfjAWju7aS5HCjOCPD5Hnv0SmEbYJDsqUuPmGxo.iiGg9eTnKfBwGyLd2RjIJeAjQ9JGkdNarxo32GlRkJp.S8kRr2itglJ3JO.AvLdhLFDJ3ZSDx7UNSisqEaTwkgorTQ0SQz3KR5fJDAR3kae7iKsKH65Ai_ocJpdBSVxzgUNKz.2y_LDv5vhxLHQcTgpJ_.fqS3gTaGa9mTWMWNZj37QMNzsCDqmopRCp.i7k52.DNT5VM_8PSuBwwYEHQ3JqcdOTjboYm9mhXsoOIbGqRCr1wuS_zQ1PJC1PCGkfDEHfSYN.YROP8MbwoINMtXI6So_Q6jRfGNqbTmC2ea7XSrVh1q.l5pk__6dSCDEt37dK1HM8jXlGWbajyRUn3TKUCOeIMzMFEZ0GLjEmIMLbHvYogrmf.1gaadZIHr2T"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=90fe9a79e89c062d';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\/8074369125?__cf_chl_rt_tk=.YRhHWCqh5Bihl2AtGhcxED3yM8Sa.3XaXQYbaLrAII-1739216767-1.0.1.1-7X7syM.AQXPZgYSZ_ZsUzPc.l5mcRNdAuBYjugVoOxQ" + 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