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-4615982037-gov.caltech-edu.pp.ua/post/756510037836

  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-4615982037-gov.caltech-edu.pp.ua",cType: 'managed',cRay: '90fca4137859061b',cH: 'WB.Nkugpu3qTfDlccxxH6Gta5ydbGLFv93jlffXIan4-1739196188-1.2.1.1-pUMGorXdhSMVwzM0qFPNQxFC3A4uUarojCUPPHRUb2S3U7bprJe.8qHcRfdUmDAw',cUPMDTk: "\/post\/756510037836?__cf_chl_tk=igS8lnom5HqE23R15F4JgX.9Po4kRpLmWO1UQCOl_o4-1739196188-1.0.1.1-Mrw5pSTbdPXA.Oq3RqNOpkFAQXcIkbhV1U8MbXRq8J0",cFPWv: 'g',cITimeS: '1739196188',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/post\/756510037836?__cf_chl_f_tk=igS8lnom5HqE23R15F4JgX.9Po4kRpLmWO1UQCOl_o4-1739196188-1.0.1.1-Mrw5pSTbdPXA.Oq3RqNOpkFAQXcIkbhV1U8MbXRq8J0",md: "1etGEyNJrslCUGlDEeH8mk10_2mQfGcg8pCDspO3VBs-1739196188-1.2.1.1-_hzv2l0hW6T79sVrYMkoitaj_QkMgNetD8B_UoY2d7D6GbHHuT8JY_T98VRgfH_gv8BUBW_5GKk0FLWKC7iln3TSXlur3k3KxMTmLQje8UiKBxMqgmAgVlBeMsdzggHSuDbeUATemnnpRLNl7U1lpp3eSXS2p1HM4xwPqZ5w.9JegTahsar3D8OV43Ienr90bQoQSEz5a5M60C0O0ONROGmowyEE3OwtgckzpwLvyey0WjmUX0_RYNcd7sbyv2boH.ETAGgeTuPT0i1Rd4jw2LyGsWkov6s9OkNdY268uTqw_Sqc8wd6oSzhaTOJQIZYZAH5_s4AW6IrByBLoh7knkW71ydVte7ZwJvYNk80ZUfRU5MBLlS2y2HOauksR5Bg3j0JZGZD0XlgXVYRDLQQw3PgNAgnidoL_iWmDOqIKadWeg0NFLsPUL10j.3w8jHsDv8m2a6jDMhG1W_XwcjVt6wkNJIbXsq1WbS1pc370XTIzfif3R8GAp6tIscxzmxORfcaMv2iHJAogk_YY8ojpNvqdEUGdO.9H9jiW6gQcvJm1SaEeHlsw4hR6mulSOo8VvxO_ZbLaKG5na3zyPU8STGxuwxBubamQR7VfeY6oUW4UqCht8VLxf5isgyokWNCuNi7skprbeCLSn5gqaANzotEtiEJrWcPzDzddBCt1QQfokkPN6vAObKeN4hOrHuCA2Js.RmWNcDlOe8zxXG.y6S6TafTG6hXSHcMycSUZomtsPmnfLWq0Isg6..piU3g5WPXqbHoJWSuWYQEjfzmTZrOvQEm98eHfHSlJjMNwLMSmqPdtAN6k3fHBnc6p39MEUuiXmKSV9kubv7Ba4H8jRm6G_YgIOxkfIU92aENqyghE0mTvptVEycPLogyU_QsF1PpSekaHXfLm77SD1W1cwljhPT1lVzZ_ki33UBpozQTfO8Cx7.n3j_y91eLABja8LALB1moePQZQocDAjtBrQPSl9ZrEqdJDLBJtvYCw80RZNLcPq5aBzkl0Qail7o8jHjDnV.Vsw2kNGqBZj5toJnLH8BzFbG3hxCEklijNwHTSoa4x0giFAIIfdHqxxgzOz8Vxvxm0C36K90.YYAMO5P.ys9kBbpYYwIVuxMsFvGv.uE2TKBbkCLj7CrkR2WNQd2BFLg_oDYkh9COC6u1hc1Z.RX1kD8NWks9lA80Bno7U27vBmaG__QwPhhXLRKZxInV5SGf2Zz2YiJS4v_6SZMolZ4VHOO1GZrujJ.qK6krGeGoM9Im.tdXWhXIjIKenSDXYtsdd6oRxePfOuFyd.Hs.9WOQf35CS9Ouv8_effS0zhkCcUnNKt3hOGgqwLPNHKaGPHC5JxAOzv9kKUxBE9xMJG.2nDaQAfxH0mgSGyt7lnOz66gv6N0AKkjNdSrL9q9VLuHjI.tlqegbUTVP1Oh0Am_nZ1K36pciiEJtNw68szcFEAZatek4q8bIYTqd_sNFl10DjE1pG.0WeAwufQ.Udqf2yl6EtstdTVm6S11D2S2as_CkbsB1.8pvw5OGAY94iVBROQBwwWL9ZMsuyJVw6EyJ3HOL_E7l6ltmmcVGxQVj_LQiKxuEfHFOCNJlA6RhUvCt2fTeGN4WQTkqyzdLGPPVvZnwRv4bA5itIRwH3CNv721tignKJtGD1j0cxgIjimobq9takqy45vu7epDaedCsfHWigCtzrlbwr85a3T2gxahbkQMJRe8xUbyui.TY_ZhNUg1IVa02PmjbqVa8dgzz.k89UJcFsxj1g2hlsnM3v89NMWkqD6FWmH1UO2rgov7NpSsr36izOQ5E9clOnt.RxxWHxeH3h9Qt7PWyJEv1xarwA5UILrBe9Dch52DSH0Q7JYRDYFGJpNepAXlusaw93GpFPjzDiCdsm3EUZBvaZ4HRWPWuWcp9kJFrUyAsSonaoSTiYJbO3YkrROq6uyVRGkOvdLT4vJShVdRvWI1avXvr1vX5Mdr19ii.HRMgnOTDNHkh7N33tKmD4lG52fNITyydPPjvFGDt5BR4cWGNIreCrmaf_X8AgfpKqpJvtk7ONO3P_2gniCq05BjtOAJfkmEe0Wk1ZeCdMVnLadZUnLrcLJ23nKLy0.KMqSrLQ5jcFT7BFG7wi0zm9Q_76M0tfzbtBczsjaVJxon3gQFqAKnScmhp0nBywxd9mV39E2YDwWYGluDYq3.MLl2nHsSHf7DXSQM42UvY2xXny7H2xkFUkNLYPRV3QfO.Dq0OrwQesgaTT.ITdkb7g",mdrd: "8J6_oEdK8AOgsJhz3Ucdre5QG_8jqYwddSabmmVaJW4-1739196188-1.2.1.1-.FL1_zbnDZtxduonU9g1vdz_VY8PwsOIPTxA6nm3Qh.VMdOmh7MnZfxvkC0RhBdoEVCtQ.qlKA2NSZhNkRcGvYuHXk_Q9M9rEl1nxzeJDbHgTntoS0S754boazZcJ1uBqCxSO8g_ngMcTK1hSZEk_VyRlxA8XxkK8ijyGmq4DYOWpKRZRTUns12Ks8hlYHQ1t5wPiVRN292r.y0pk.bJr_hucUUFIqcpOx4y8jEg4m3kkzykovXgJcT1sPMmiTZURhHHMG0KQsMcvGEAgA.uN7UrgFxZ5UqpYiHt6xo2e_rrcuMdtxiAHzF9WeuX1Jv9YJEERXVBKAVv1rEUbO1a9lfirrjGbEyd3.WNoPs_YLgu9uodqoip1ISGjgblPywb8Tpd4iQka8h7ZziL_adKExJhsFjfc5.GDsinrN5_gVHLu2ECMjsGxjrZrgj6OWdgAeo4fxMqaICLm196yHy2s1ecbEKMk0bfMI57G1FZgwGEiDTrc4rAGgaZI.i8Vum9yx_9C2..sp.wrciCsZEwCV3WqLCs7C7RYAfxfk5IICi8jw.crDYuJfCXnMUnKZJDYznlYYQd019AlEpdrb9zoNgZYXtl15IiUVvEiY4BbVd7B7DPVowCGm1OD4o4fz33.I_POTpjj2MDwDMiVrb6rYWv7z2zLDQeCQO_qz0OH8.haul124ONPrrG7YmBB9s0EfS0kHphvJhkbWwjnPoR_.8DJ6LpTfX5mbU9omJe6w9RRvvVGnrD68xPrCOBC01qhETQvB4WRSLJFB9d7c6WxqfcHfRq9ezlVoo08MwGHCTWJocLdEx7LBxDEkz0jqtOj.DwdNYvDeycOFKjhuW788oqyg97nJGczUZw83agLOMH9TWr7Hg9El185X46eLnLeRzIwkDn2OGz7CvIllrJ67N2ZNBaGFn2DU5X3pYIG.ePw9_MJPaWbe70GZZpWF6m.XxZ_vUfe6V5iGSyH.O1MBCaUxKsueOCPWksnK6AoW415CtDHy3RsKiE6j3IdRGH2iN3xQevG3edEAmrBIYsIkKSC8MHdTz6jMo2M7ceLF9Xw8RbWdl6kEEuXxORCeeSzH4ZZyli.K.YXc0yo6QsFmF58hqvIh6YuVN6EoQctJagpG9beNxN8LSza5rgSL8rW7pckwTQTHqfGivFA0VriudQDxvdR7oSNbb4s74x8CIZ3QzXhyZ.grDaRFMx.cvOeKvuIw.WNaQTU5t94sjHrPnAMKitDv13CdhugjAy18wtjwQSE7f8fUJcEFiKpz_L5XdUQnjtpNzerPRAmB8lWRZUB8aWSkz7kYAlp3J9YDHW6Xpx.IE3UPFjyy.k6fl9gHu7auunnwKPbiaygVWSZOp8LXWHraNtMnW3r54_VW.cq8ceA9tP7K.XhxSeUtw35J.crCBX49mNGOPoIXdwNvX.9YR26DTdr_hxJF8o00b18Sw_V_9V.fIPjXae.XnGvBpO5va4vzciFOp0X.kOvTxGulJVGoKfcWWVosv3syCYLXYDwL9Xpz.QAjfo7a.Nwju1nITKxMhn5I6TtGvP2MkNJSdeTnrGWkh7VcA_A4SgRGcOVOW1.9RqYcFmeK3T4t2iPEkEkMlOlPOwPxawah3IeZpDNk7l2w2Iylg9z8j_AjwEDGkvN9.uDk30pd003W4SR7JH9OeayUrMHjMiIEscYvpxiaE6RHlYRObYd66pTrRDCcRKkTx2m2uRA8XeHuSVqJz6MWDzUYGiNlbAvrDxW3JWWr7ZppU4mpAe5jZsLTgtb6VRttMTTZEYoP4ZuLwywdZDlIV6dFh11Docoz9vFA2V1BBxlfirSb1qE6NnDGvf6_pgQXfLcbRpF_jCVPxtyDsfbrfoUl1ZcrOeyA"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=90fca4137859061b';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\/756510037836?__cf_chl_rt_tk=igS8lnom5HqE23R15F4JgX.9Po4kRpLmWO1UQCOl_o4-1739196188-1.0.1.1-Mrw5pSTbdPXA.Oq3RqNOpkFAQXcIkbhV1U8MbXRq8J0" + 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