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-8095627341-gov.caltech-edu.pp.ua/post/227541407498

  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-8095627341-gov.caltech-edu.pp.ua",cType: 'managed',cRay: '90fd9dc3db70d6a3',cH: 'RC6wqCGg.fzR_68O7WdD2h98I3JaY6Ja4Op5tmebLuQ-1739206415-1.2.1.1-YW_MKYABKJVXTrtTUcdlg8WOUD7zPkOBj7tw24pj2DTyMpnSAR8FXPnQeM92xnqG',cUPMDTk: "\/post\/227541407498?__cf_chl_tk=ZKTLmf3Y7jqyL8Fybl4b3romx5AOegA80NTJnqezR1o-1739206415-1.0.1.1-yfu59UBN.sOUpnAR5xEoyA7XH2Ybh9ANrHhytHOPewg",cFPWv: 'g',cITimeS: '1739206415',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/post\/227541407498?__cf_chl_f_tk=ZKTLmf3Y7jqyL8Fybl4b3romx5AOegA80NTJnqezR1o-1739206415-1.0.1.1-yfu59UBN.sOUpnAR5xEoyA7XH2Ybh9ANrHhytHOPewg",md: "sPANrZbbjVwpbDgj69qaJD.2c2B1i9GmPGUZVW_p6XE-1739206415-1.2.1.1-b7HPC7aJUruA1Q5LniQzkWKiLCJSN_xs9YPhHbJsAyrHfaT9Z52_IwGnyeFcq2OWJrnqjP0t6l0FCNabDfPTtAa3YII5CDjpakrm7Zl_jRFSbb6qo4HVBGvZLn27LR5ZJPmegLULC0oRrcf6jcOVeWfknSM6KhmS.HO_xfGlpLciJEjG0pqj5VoJfucNC.FM1ZvBj3toHG4WO68JDtOHHOs1YpOx6IgVADsKmm3FU2DfEijcSSr1tm5VrkTpMECdUDioHF_yk_qD_7sWtgUm_X524xeEgN3odAtMyzsHUZxQD_JAnbo_Yg.ag2QadW21k1j7fdjSgPoxPAy7KP4qKpWlBM_ZqIUU7yEFB_YJe8LCh47kfKW3yyBftr9YTxK788Yg31YahRRH9aSZQLT9RSc6bEgRM0Yyki5b.f.Cz.nZwu3gDVHv_h.H3FiveqRI7wUfWQHJRhTZ1pXWODMYzju9lNh9xV5lqujIA2LxkxLrok44UTjcztHHBEvUmI.Pm3Ln5SnMfanXLWk4o158vE9tLQMTUXVe42xLNASPNWenhkOJ5BNNopKLqOGqQI3kqIa26kXLpgYRadDGUsryxsHDdkJlDUa47xRyPQjgJA9_svwJfTg0I2r.ZT9uCr1MDfEM0MQdnl7SZd7B_nCx5UfNSVmWp85AyQQKj7WHx6On1.ibzpGP2esoPLnInfcnadV.IMcqbtqNbSxpa__JK.7Oo9Zz.QC1loztfr2HWUUwmeviVnabaKX8iOqyzSIyx6mXUHFFLH3Mmijzao4WuFOYUJAZudsy6RICofJlkNL9AlEga_oO3pgPDNi6R26JhWFwabR7kqYOBBMUxvlZO6xMo7kSCJANFoRNNuh5OQx7wY2H6ql71yuZONUa2xyL_a0FvjHF_2XQgPlRUFaXIWTB3RNq1BZqRen30QNqpwKvMUQSYsg5C5AR0AxdkbJpVd4aTG16XjOzZgIKpC2gQD.TXmEJna.3SUcyTNNl1PWcJJL0xtXAkdhuFEeJOsGiDqGJTcSw4YheQCaWKQfjUlbcXZ9_8mj61wpXC93Ge0H99kzIZSLFFV3VczZmuASlcfjHkS69o9amjrfysqxBMytw3KT3VKo4y5jf.iIr_.T5mQjVXkrzzT2.g8T0Kbsx5yeZmHkFGzD02jmxEocIW00dUT0oHrD5Mbqv1fCjhD1ejUgpgkxMGaXzHNwLsPd3kc2LAy.zWcOfNUHMAVKlBlqZAEKZ9Pvx0fTbG.3YzR6_q0zT0.dfokFzGLqg1ZoJIibx5rv6tQGPsEF1wIwdUW_khQ91FbV8NulONiAGCcdlsjn7JU_e_BB4SX1Ff0sBBE3I6PyZkteMhiSfjywY8rasfF2BF5t0_oYU_3m_ODbWOUEvmnYZdzBn.TnHKtZyCCvigpxfbuosDd_H4oQ2aIz.KfLDC_Um_Wqns.HjEzcm6PXhmhI_oI6AEeIYMO8rpZiDqT68.A25ZxYtGjcgWYVaIrVnzbsEf0yNkuYzmjeat2lqaxZ18hT0gGbvT_rXp3hGWzdYy.qhVIlrn0pwfDlLzWIzmEFIUYxhBchHEfxsRptKksXllp_TzmV0QDW5eqvbTdj3OItt25aiUrGHX1jt.s8ewEvrjUkpTPKyY71yzT2jeE8YJUGJPBeA_9OuXeg5sUtn7vF..R2l5xP6ZIXbdbEpoGUC0YwAsKKsMQlIySX4S6CDFMpL7CJZK5YSAHebWfR6vIKvllvvpxiT0hMIPdJFxRgQ2cmgkkpD_TVK9mzlQmYqHNsPTVrFUvCCfCsvqUEbGQuO.NbizJzU2dpnVi0KhmpJFrFtUWgqmAJqlPnfY7XPTBDuGIAC0WK6RiN8QD9srtghxeCk_VZXHOg3z_JTIMKa.WMJ.bLdjGM.RsSzLucfNFv1x_Ai75XsyR7err_sCQIzFPcVE_2jyorb5csM4fDEevCk_Tzis0GCpQ1T9Mebs5LU9xkPZODSdMyvQF3.efJWktfdcWVgOOajaL5ePxXvXT7pFTtrUQvl0kTewhD0yeJbOWh.uXPzeTUUqevuEjmoZGeCLiXAtbkffCBYCEm1ga3FEi3CffUAuImmAaSOCwA9lBpCPwIttIED3uGPFa9QHFpdvtKksgDbRjy4Y3FDnpQ6K0nWEDm5iaeX2s0aTnkB9OepLaCFivUCrnDVPn76ia9kJrmGKQm6Ux869eKHdxaCEvdxdhGJ5SACzmdlT6blhm2sL4icwUpesMgvzS2HyOO3wFdokQ",mdrd: "X6Imz63GRV9elqEW4NjFcL8gZR5awcBGedoIGDBdl.Q-1739206415-1.2.1.1-FqE.vJuIPqX8x5R780EfE8lbaBa_nuG7vzuX4oYWgeNs9pOv4NR3Kf17knaXpI76qm4oW60iO9HjczNjK3EsNVsIqAdvpc0kdsOTIJAjdj.QR7hXwIemxp0D9cjVJ7Z0onsOgid1FJqMWvEJil8SiOIvj2.6g2ZidwPC07J99HxVlb2fI98oCjvSV70njyLnbqdMI3rDw6EdpB9G2chwVs8kMMkwOf2FvOCnJQTVD70y0zh3V.AFaFXSJzpQ1kGNMHiGxHPWdK4BFtK5mJxFLzFm2Gzv6WlG6M963TkvnP3gJFouPkP4Yz4rxBBbMJs5oFutiDMCx8PCb9Lt2D3aLfhQGiqs0F8kbff4b8bn7HE3UIg.fCNZ4i8H3Nb_glQ0I7x2JWLgOxkNPQJLISohTr4wXgor386OLjKrf9Sku2bTCclkbLhgf8PiaA7d6dnl8cVMyZdNmc3tBtjFqOJ2BijsHIK40vwDovdeuAzx59ofwaYkdWCMHF2lgtroL6enrVmNOXeNu_ElWNfP.Tcb90UwUGMPZMimpdnWfUBw1Uov_3TtsYybZTBUrzBMjCGTPYnNDAg1sUdwZmnWVJJYSqAgPK.GNVTVYq4fFIhYubw6C5FgmAGsmIN6iPw6ZbUpWuKksDqU1UlZnSCdTrCILbWV.Rf_fmko5Je3FBurhacF6RR5cZY5snbsmKhd5vrbB2kmlixLsPC_MiJc1DLhIYZceh8jXfZICZIC9hr7cuoBGwGuFVQHc7FWwYiIh1OCN5wQSWdROf_YDyHqQTmAPsdJ0cOKINQY8nwAxclgYGVF.sTq2kmDRx_ruhSOV98VTpyZzQYnuKqqD4RUdO.cPsy5h8iyRagZne3ez7Cj6evP8IZrrAMlNSbUkqQTlYK2r.eJZr8JirRqqFSRlZlayGTYA3LCBrQzZLSXDOwrA.RgoKHvsPAONIluE7c7zagooOExCg4auka_an4dL40r3.6VB27Al1SURKghesRvjKogwVCJ9ynvzsiXJyJqYWRrMxxwj1GQ_L7N054Y05fSbIyvQSkudoOHbaYkDp3ShtFgJ_hVgQn_sInSzBxgdD_0tHRlzT2DKx2yroNsx746mI6WjbslXYcQG5eiJMiy4gAwVAgj.Wm9fIfwBiJ82psbA95kc9QhWRf.b8Dts1cJqQy5FOYnoRZE_adZ227XqhRqoAN3O9YmoA.kpYDdNDEoN5zbySDtCMo..lqZSMakjBsadEyxSUCuVPMfHkmLoUBaDPZrdKbT9vNyYgpk45F1IfMv1ffHYKfuwIzjOKa_jbxRScrGM11FgGmaD6vXWGv5w86ok4TifJ61ZJexpxAlCfd_UkTAoFQ5wPdeGRMxPNAZxPYqmgiz0bDkibfxfBRssAM.xOLXg0dZRmf9X8n23n8qRStnykEGykcKIlJVYGrWL2Eyp2torZC7WOsG4UrXo6ZXb5LHkB1zRX.pHnXU.T3LZWIMPHF_jtwkvE5NvVWNkDizX357q_Z606Ckku1OD1abmGQbTW5NEzyB1JHZRSt6raCRLhIWDJhdZLxWexeJp8UQzGj6RWmmt28UCeGmTs7PCpG3qX0CBDzfTsf5RufTCf5tMvB3AbqCdQ3A08WjsWg4PjDnF22bQfbPrf5.WckViTvX8Ce3OZl_VVZTeyMGJ2qlOX_Mm7svCR6Feuia0VIBAlApZyuiHyz.ZrpIN743sH1U0QMO00KXQi_PDLCz0dc_JFe3j_Y_wIaqsLkaS3RVlY9Nsiz4rY_AFafIXjYNaxPpoYek52a7T.4gQ3GjjzcIQtqBCaYeLe15XKp5bK3aLfAo_xbUO3nfTtJ6oB4.6VXLi5iU0tvHkCCN"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=90fd9dc3db70d6a3';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\/227541407498?__cf_chl_rt_tk=ZKTLmf3Y7jqyL8Fybl4b3romx5AOegA80NTJnqezR1o-1739206415-1.0.1.1-yfu59UBN.sOUpnAR5xEoyA7XH2Ybh9ANrHhytHOPewg" + 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