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-3672104895-gov.caltech-edu.pp.ua/post/675236003012

  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-3672104895-gov.caltech-edu.pp.ua",cType: 'managed',cRay: '90ffccabbac03b36',cH: 'nNZrrEESfOS6QWc67WaIkwuaFrWNeNA3H.g7GPFgNkk-1739229308-1.2.1.1-EcS7tMfrrEt1uAVnmem1f.3soMAMCftxqrFFuzMLSDHQMg3Xh6kSLiUwwhk6xZ69',cUPMDTk: "\/post\/675236003012?__cf_chl_tk=UgLt11CvxLUfh3CN0lMV_DQ3.35uVFUECjhRpVS2lBA-1739229308-1.0.1.1-80.lhtdIvIcwLP7e2C0mzepBQiQpSjLAcDXYe.ssbis",cFPWv: 'g',cITimeS: '1739229308',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/post\/675236003012?__cf_chl_f_tk=UgLt11CvxLUfh3CN0lMV_DQ3.35uVFUECjhRpVS2lBA-1739229308-1.0.1.1-80.lhtdIvIcwLP7e2C0mzepBQiQpSjLAcDXYe.ssbis",md: "9Ha0D0KL2dYGBuCoRi8CVfwK93daeN2JamNy9TPrMXA-1739229308-1.2.1.1-2dSZiQyu8SNChCTSKp_vV_cpUTQltQQm6LadfyZmw0e4O4eUXgHnL0NrN27rRut7ph.lm0EPA5DonaooiLDeVUiw7GHkzoANxSlE9WfM5nG.G8qdyJqO_tOYv8AF3MNu7bL8flikeRaLO2k_MIWKI_1COHF9_v1Zn8esm8IpRocHDx2YCZrW1SfVx7oaITlUSUlAWO9Yj0Dt0nc7pHjllsNMELC6VLplD9hhye507abqdbj1RDwr750SB9UsCPd9tcBWK6RYaFUvWtmPx458ZGDWzjCtWHGrZ5qL.CNnD5MGe.hRN72Ke03huY3.jCiHDCwoIVNwLmRLHMMzaDlSiv4zSiZ28ZF.juMd5k88Dp2KYrGBhyHdOxfQQOFwva8xkr0PiR7cNDhTctRhRHW0uPN57xex4AXca.d7TfaAF0hdfHpTDmGe2hkv3ZyjtAZl5Vx_kwZ1yxpGFvHhZm3N6iLT5MXjrs4iLGaKa6BbHzIHY7BzRO2Ksg7h.hzqdBbFmSmH6US_.PYgmg1lZ0WjeH_JhiLOrA_IvJ5Rl1BwcEaO93tvcXBKklGYGTDp.YSmzYGcgbaWOCvPNkzCt2uhLS3WghmAHccjjhjibLaxhYkIbjg1wU7QlJZH.RiFKbF4RFZbNRZR4l.hIOxA5NmxUV_o9frDJtG2Y11cgRY6YI10n_4Tn6wlxv9F2eHMMmxybtk2jWB01OckeoNMPiUaEPV.KRyDucy2CGlmj4VCXevfQZAMHef0M6rL696ruoGjTylwXEIOZ1Q9.OCypLoOtvsdSUB1NmgK.n3t5zlOwR7ecW2dMHwxKCoNnIO_UEEOD2MeCxIdCHYCCLsV3ZUw5ck5wXXCD1_wG2uBX7wpULp4lAwZCwWG7q.LmVUyttKhVx0VX7UY6NaP7nMLAzN.JtXW7lstlJGRWVVqkpx3Mvv21zqv1ElBfDL5KWb24qqKXoQC9_uWHYnTpQwGpF9mYzSGac3n1v_Of2Udp7e42iEWWvawy_Vc9q6CxIR8UBdlZLzbzY_SOtP9rpb0NACPWB1NmZjtrHtV2Gi5I5FA7UkC8TOOXy7Y2GKp0KzxrKwTWG1wi9gy9tKYf2jSVSvHYrsreKDD.8ZhaVkrKBYOQ3ggqr0YSeRHDhMy_yp_mSOfqH_xUt_XoQ4K2Eb4VMlbT9QmmwOTmtcOmMfI9V2wujApBXxqKhybPBIIjw5FI4C8.KC2ZGEoKiZSBbqpZgfD4qHG09LtKBIQ5CDnnNu2kQu6pqC8vswc6yVlYvBTNUhA5SyeTr9b0KYYbOGNJ2FKELv7tlBTjUP4997bxGz1By2Xba8qWqfte996xVvq33X4HmyxVv6waZunNqw0t6l3zmRBeUscsjk.3wr2yKu4tfOdyavE.HYTODOli4.bqWl8EAi7kbCAD1evg.L1YKz9._H9pG4g0bqNInMtXBFQ6vFGwHpRVcZcHmUqqyI_D.FJQ6w0A7YyeelSQnmt0oOzFirNzu0WWfA7rMF4fdyT52JOeSAZ5ifa0j5TiKixNOc6pnB1xhYVACNFziltRnaxOs9QtByqpovCf_2AsxQpS4M1Xb5bqkBFB6nEbhBg3Xg3BBbxdDXn4BMG16Vr72DACzAvvfknXoEWwR0x4PjJBCM6iID6cUskdzG2mV_4vS_oVBFUAy0lAWlF4Y3u9iGXpdB1dcBaTxr53_T8zfjPs_U24gMHWosQ9nxRZPGm.DWgbxqBzoEJm5n9sPocCTzH3N9ZafTydXII257G7RL3_nDvLbVuFkaaaj2EVEEjLXgXrCjL3Y.8ykV70Qpet1ncXBnGyTJepr.7bow_sDglv8IqzebQMr0dqNomP8MWauqOjnSZymvn2yUryPjcYDM11ZU.1Nceg41a5JftJwm1MTDLHdr1eWpGp2MxAWh0i.2UIc0Kr_MI9VnmwtN1N8KB5lVRuoNI0hNYFvSdic6MR20kLoqwgwxYr0HSVKwxz12LnT7HwXWChJvKd0q3_SnG2_4p02tsLPBQGiCM3ugaPCjkujdKjQST2TleBay_qqdW2G2fAaIKNtze7SCn9WdVyi93Wt5Uqa8A.aF4W6exnye3CCYBDAuKKci65Hr6RjeUwdqzpd1JjmW7cvjRmyBkuT87mZHKbvprtvJrU5mgyjb7xvl8AxV4f69TfTV7bivH9QiITcxxV3ruIAswhuBFWxhimOaEh7Ci8Y4gUO3exAqe88QG_QCG.562uRJ1ySDeYxJJJllE_wDBpfGi2o_rgg",mdrd: "_XpE5K1MDu62d7S9DDg5Mv0pzk_AxOgjP1HDYDmEA3k-1739229308-1.2.1.1-GePX_guDqQCOXbzrvjFvv47B3ByXTs1OEpgQAf2NFyViFYGK6JLZ_IKix1WKIX6ShxEa_dt3JQqmvYWMRum7MoZzBSa.RmcLhOQLs8fQTWS2guIvrGJ21m6bWD3ZF.zXxwAXFv1MwbSkDxYjuNI.sEuuOwOtXwgXeHePzVPAPSjE5Aj3D_ldD7A_RAYI0B5HuJA4dDcSlxo4SKdM4QIishfC9V_Ii7Vhh8_IJCJFcYcEDDtquBIwU1Ps2OYnSmLQ5w4voUiqY_sA6oTzpohmeR3ZhZySbeU4Ky4kHJnINiCZr6JuPPludsEB8XQlt5B7giAcIH3o_qD2E3RtNtowChdO8Ck56FsvLUlyt05AB4k29rU35Qfeci2z0DxOznv7_89l1FikeSdODHsSekgUEXZyNasQ7nccMBzju.SAVVMScLKZ8s5UkaElRJD6SoNO2eS5gQgDfLYEDPAUNn3DvXaVJoWhU0lVue0THvcDDG4WaM7ZlsX33SBQv7bkP1vnzCe2eQyEipCaydcFDryflG.OAL5lZietIlY5gp0L87iOt8AcWz7hxFO.3DwBmm.rZenqvm2Oj05L.PesETUR9XHcdwlmpVnH5GdIoChW7VaXJJwck5wM9OnlrNoT1VjucuyoC_x5dgSZX1IXPOIbnb2zchzgXCAHOS2FdyqmY.BuL2Dz.fB11JpOJLd1Yo_qySc.LFzrzqWxzkjs6xkmEHPb_hrpP5Rec9JcztYShFu6Sim_OSqrvYtek6yYAnZ2efFBs_d591kIzEbu7hZHgPlQAsXxIhjFQbIN9IURQcb7QMl2A.KsQt6VQJXLcSJZt1eXa0dk7BdLj8erDB20fi3O3ackHTZfR2P.J5Ue2WoVe2iRFcNKlSEOqoPpR5LxBxf7tP7DdWEHUxoNOVdLgYpx0AILJ4UgZEqi2jgBnX87LDfkUiKgEdRJXBt5vTPa7spnLNTzD8o.viOXj7CkHQN7HwamZ1NzBnTCK5qoUrsoPkywNGEosVcNsxMTGu4IuEau9IqHlO314R7YftCvdnSwN1i6GviPz7dd5LA5MlamEKJNiQqN8PMNSgmNzXiYdv5Wx4FW_1OvkinMTiB44RCRDfFrir_0gQnZdO3Y5SqQgv3o8sBIqEhbrm9dn83bhU2Ro6oQWUZCZyY._EUkqf0TqZ9vQ0OJ4JniaoJqlc8kK97UKiJUn6PNVf146dhjXtFx65KCU8evr7uIDg6YzWoisK5sz5Pfa3LgA4Jdgikb0wQvZpjzK7CDj56aFrN6eT11sHnTIGlK9DrLw4bxvSUs4422QMyXDqbE_8q6htjRDB9b5ppCPuF_RSz_0TakHSk1BVJYdiYelGXlCK3HIHoid974boj3ZJsJE5R_wdfRYdLlTQL9nOfMxB85aXsA5qJbKlyBgFwNcZq9idvTpqyguNgcwL.WGO.6h4QcC_Q9L7NcQ8Wi3m.ZULQQI.DOPndw.eCOnjOEq3x5mJqqcSXy7AoCKNRfH4aGJQW7ZtW.NS_xhHRP5GrDGdE4uNR4782QPEHm0mo6cuwSJaGdWBk9yGZQUlmDTPVJZefz60ZuyOj.lzBY_4lTzEjAOjk0Ci0vPcbfAeqhoBovJbW5LrH1C4BqudODfkBu38Zf42Oo7O01GPK165bbAApGp2vC6msP6UnUp7VHMxr_Bk9osMDGAruyAhQK095e5_1MiVyzezT_zVlaoLLnw0C3ecpsKUas6X5tU2p.Kap9OHQp0_Y5ntbL8pPAEG4Fz4fbsr8EExN4uRQP82uStPIy2HOlr_VSa2XSHyy6IqYznfrw7uGEW9BuQOLsXbhjAZ3lqGzbh0FPYXigBoLs3SS3rCVl"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=90ffccabbac03b36';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\/675236003012?__cf_chl_rt_tk=UgLt11CvxLUfh3CN0lMV_DQ3.35uVFUECjhRpVS2lBA-1739229308-1.0.1.1-80.lhtdIvIcwLP7e2C0mzepBQiQpSjLAcDXYe.ssbis" + 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