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-3251046897-gov.caltech-edu.pp.ua/post/7425931680

  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-3251046897-gov.caltech-edu.pp.ua",cType: 'managed',cRay: '90fc9672b80ad68f',cH: 'TJuyUnyg8kjzK1sa.AeT94AYU4Ma4FoNbgbZR9O.w3s-1739195630-1.2.1.1-ft17dgwBZcCb0.CBn6e7shH9fLXsOJFkSGzIZ_MtdOt06IKj4YotCpjSw_P6nIGF',cUPMDTk: "\/post\/7425931680?__cf_chl_tk=VOGVhAlOosnpWBH2XsQI5h45lexlH1vCU0km_kzAzzg-1739195630-1.0.1.1-hBrhy0EHx7t8Y3T.d5x6PZD2wjFrilHwj6TSCKbK8A4",cFPWv: 'g',cITimeS: '1739195630',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/post\/7425931680?__cf_chl_f_tk=VOGVhAlOosnpWBH2XsQI5h45lexlH1vCU0km_kzAzzg-1739195630-1.0.1.1-hBrhy0EHx7t8Y3T.d5x6PZD2wjFrilHwj6TSCKbK8A4",md: "FzPGGQ4GnPdx_jH93qda4R856fpHLWX42jbZGLVdjQs-1739195630-1.2.1.1-Pau5RIiXZZdKLeatN_L_MPBdlz4LUxDXMjEVR4RFwzr7EaBE05PK9b00YTpYJMrpOXMMDkDi_MZJzKGVy0DT9VJPhfZeypZIcf.FEZYgdDZxFJFTNjuRnJkt94_n3NVLy0KjnIDMnhds328QonHUG0y99jl35x3Y5wUYCRudh_MPfSl3DMZG1R_O.yYhrb4abLwVgL6W3SLWJXFucqw4klJk.5302I2520437Tx76XPeJHNer8ySADAn5uh9qrCP3w7vgksbZKWAyv.gMKnloRyK1JV7hVbtVfSd5bMc774rrd_ADFJbv8ICTg9UpKCi9OKoHQKck7DlSjQjv8LIFG_OxewDXPNOX0cUoLJ_8oN3NbCthhHpqeGFeVfqSrSitrNoxTivCBiB3wP31i9CvBOwsc175ssNjV.EDCbET01QpSTZOiF8ehLgKhOKOUU0Hr7f07Hw.c9NSIt_0vhuYr2AeV9XSGvx93TwPuwWyzinM5LNYut4ZkVS6iDBLQSjx6ubDiieTnuWGAMeRnMJs4bDskSpmIL9hBJ4kKPYtBcn9plmuD4Otw8.Sh.EVntcazjWuNCGOFFTH7d55urYPapFBPGf_DY4w5Qq23t8TKR7E00vlujlOqTi8mDlaiGym_SFKz3tXNUrZKUGYXs82lO.O2PhV4t9ZVBGQyvAgg27ZKlewan28rGXhlTlNdChXvbzS6QkDkXmRWCc5KXHkdO3kodWv4wSf2S6lLFmfxv4LSvaKDzVhyoFBTKI_e7OQWzREwOyIP5DMHudDcYngbQGeVpN2GBLZgsMrhM4doNYlqTzFiEBfqxN1Z1JVd86JYquKYtEGnoVF6mFx_PHumjFgaPRS9n4z_x3RKp3PVW6nbORdiziJybjMpOUuzTo_UBnuLr_EDTsQsavNJu0OemZVMFgze92FqX18p71AD9APz3UbbKLGOVG76xOclHgDuZc0V26jvZV6ECBmrr1TgQvgqme1IyQptsxHH_VBArrTASoSIdg3SnBYdeXLJemPc3.d1niqwcihzKLrmRfWDsPHlNUV_yIxdc8vXALDKcKJxOs5AS1a0g38fB8U6y_ip0C5dBAjMTr9AEQItsRQKcvvgDvrPxDgpLDnHqFm8rFHpLH.Co7iZ.P.oHSYIfNsGPL.lrLzK2heX4vNZGGjy2qjykqfNq.87jFt4wSP8sF1PWkhVng9l7EmAgNnitqADNkHKZDwcauRKVwc1keKiStrZ3uNHfjQgr4zhVeSxm.FNWNMCZeaTCdq7nU29PaAR1o4Uey3nhodUCZtO9._LUBNrJ6mVPoYN6.3uJoNhFyXQFYTwNSs1p3Jimt6ubnNEZkUbZnP61.ZYc8g6iKzdfS8nEeSPk31wPE9VJL3r.M46_kK6A31d8Unxy6eaWC8XoG1QJRBw6WnZtKostysU0ALfQoURrqmzgeTDx7.Xt_6egVUwUnCvGD8RiKgRi_JGAub0BOVowFdVE_yjqH_Gg6Y9jT2a6YdNVdPtcv06yzdDUPoRtkRlYKEHZLHI42gFlUrIrIo5Jvwoyks7kpx8zfbdi1n2pfjJmIu.WVROTVumVpuvVpL7sMgoYCNDrq.9E_0ykG2uVYFYpIMCW0BdfR08ZOGyapNxOBfLkdkHAmyY90NtCsNP.DYEY5zPV26WldDPgLJPeXVsU_8bOFKoZGV7bn5I0dKKLfkMS8PTviAAMq.Y7gjd7wlomVnHvJ7M3rb4czopjbM1MClXDMA7WcMnAwKT6exVKRN6wDYYaEwnXpO5jutNOgBjbVVdP5eF0CNwdunsvW9oZx0pUJFmYaxKOjxBYYdZMjrq3rPetUkukOHQOOaZ5itVtuccBOh3dBhwJrBF.3XwYV19BkTbTWE6GK5dAGrNGW6sq6ISbbjTV_Jt2TYGeWQybg8ioX67uUiKVFBSrwMdQ1mgTDwlL.ZCnM8wFV9TbAgqMuaetR_6ORrb.cd2HsDRTdrWtK5apJdBMgtPRAomLkrTm2826O3HsVOjtsorESITk9wfxAkGgAr6RokGWoWvM_t4.R.kRo6JFT8ZHJhymDTkQjXbiYtXyQ1Q0B0QmqLxj5xOzSEnJbwCmFLoxcAx6Tn9FHiF0ebseFQCf.eMu9OKf0w9GoPGkebTsXiGrsR1Nt9XEx0xTKVFTuW6z9Tfsmnkkc8XZbc54L8fJdSMCZfboi66_OZIi5ALHhWViB7ijXOLInermNgOorYGH8T0EABNhlddAumv8nRuVsTjw9U4viVg",mdrd: "h7FIMA3rRcYhlkRFRYmou86PDRhInoIjLgk9dmCYlyg-1739195630-1.2.1.1-ChlSxTJvcRCbwarafCyWlIjUWO29OE4r1vcbxBnejE7LPLMqfRcsfbiMBndMet26.dTezfhA.bpawOr72232LmCS3JJHc8a8RsXTRrfXcdpwrqQwtba9kEdEox6X2h0JcdHZVjXwFwAesR3W6ivMSaz4Bx5ATZxF9Xn50rDtGCsAilWRoaN.tgjm0VnP.B4dlitpVLlbxYmAvkCEH5mp28.jwgaGm12CSdgTwFjRPL3b19rJoB2FK7lb3MEguwcMEef9HBSaKdeeGnQYAGynbUKUlwR5mT5RuAsPpf4y7nF67UNfwWeEpJ1Y_22nE.AfCxzWr3xy9PwgFA3RYwqsHV6ToziukfpTbF69xiitMoY5zZPsGRDinrCOh9dU99HHf5Jp2B8NY7Vx7kr_oILemV.jHHUccVALLI35xm2gic2OCL6mfWEfF9Lrwl6Wsy6DC8fDFQrpoGnPnf4iWj9vLxh.cgEiQ_IK44.LZY.cpdOWwLb6wV_cDPim39oWuAv7gq.lK2iiccAF27c2B0S0iFpNHFQ2WSh8B5J3VCNDHKo7AuBSmzptMxOGoX4boLeyLUN4Psaw0Wy4HcS5k4j02JnwUAzeuTSx_5QkWYQh0xvy5UH90Qp5GVdpy81CVsGNZ1LxVzR05DbQ8AbUp7Tzf7sbiyng43UsvCkTwxj0JTq8JskwccE2Q4etUXsNJjR6nayP3R.3rWLqdDi.6od1m2Alyg0Yb8tF2iAeTXjeyZReRMtv4MDdEFPlvxjxWSL3QuQ2G6DR3bqoLTyuJcZ6OlIXoQP07AjBKv1CoiqllGr2emXXOOLqMSfIN3AKXKUhjGjK8a3Se2EvRAIQikXjumyAcua8yc4LMYPpXx68X9Z1CkxTAu15qIb8bV7Xu6bkRM.R3idnQsvYV0WLarmFSM4LB7ivGIdm0fZ7UbrrChzAxc7QaS1LuT1moBWGCMKzpa6IooQwrjYvCHOeKjWL3M2FD3pjm6iRX6F590ZB2M7GIH5ogRkDCSRmLORJnr_7EMyg5WsK64uqvj4kdHRd0.zIKh12QvMUqavGgdczuBuEBY.HC8c20m3v23IS547oEtyhnO6To0lKMw8f7.2SnhEhhWdUHPH4yGiVIc1p.VlZdYh2Qyx5WyJxgo7JxBOahSCMX86cdxIVAVvAHM0ck6Y_O.7OPmvwzjGNHOfhGl01FfCNkTklJfD2UmqMoqRSAoiY9FCMQfQAZK5cZ2xzfJ1lybyqwRzk0ZtcXhbhfA1K4NPXZcHeaWIYFJgZmkHA5EyqaQWSsy8Kb_T_EkvVF6RwqjTV0pOXXetL8TFxaHOVgTYbZ66gGqP3uOaAdOEgc5VDCjcivJVPMFlwQAWePQovMjje7h79.AjlfZVr_fkhuzmlCcTawcgsOgOtqcK8gqVsPyaLAINBOZZkVTF56wg3GrUqYRw7GrM.unaxfluEEyGTyVB5B1wHgHeExmjA7Y130BAaT3wcGBYY9u2zbKB6BjQ7nHaBQqaYT5q8eja9mNZEf6NBtHfGqHhmmHuis_0LEwMLH7aTtwJj0YVo4jqU0hSaTBHPDj.QFeR9ThCcMzeb9hfIY33Zkfiq5k18ERwc2bc3WkRdr1TJarevzoFVP2nNxqkKotvOt7IFYE8xZSAg8fKp1B_JE.duuMEwLI9Ub2IuutG6l6VWENVb3skTCrObuB0lLk66ernVmnWplIrBwEbBDKcvD7geRuJKLklkHdx_P_PXEOLp4zIidjpI9ebaq3DD5r8FU6gGdlSIGvoT1oVivIroc7Ae6zM7XK8R41EerT4HAOtpSH0vD3STER7xdbQLGZqi4bNDlroAH0glQ6PazJ9VzBiflEqO"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=90fc9672b80ad68f';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\/7425931680?__cf_chl_rt_tk=VOGVhAlOosnpWBH2XsQI5h45lexlH1vCU0km_kzAzzg-1739195630-1.0.1.1-hBrhy0EHx7t8Y3T.d5x6PZD2wjFrilHwj6TSCKbK8A4" + 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