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-3941802675-gov.caltech-edu.pp.ua/post/4175306982

  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-3941802675-gov.caltech-edu.pp.ua",cType: 'managed',cRay: '90fe155ab9325955',cH: '.Wp_G4Laxqy.pd04EbMpkAD1PKIic06C1hocIkLRJkg-1739211314-1.2.1.1-rZT_XW8SHTSjyicUMO2vrfET7waiFD3BdW3hfIe2L.RXNGrmcRghsCUsKOOz4i0o',cUPMDTk: "\/post\/4175306982?__cf_chl_tk=O_choXDZAMA_8tBipPNiPo1DI.jtImK46BEqwILLYLY-1739211314-1.0.1.1-vs2OjahJO58pXHCTwXex_5GB7sLeBcvKlC_sl6dXVDA",cFPWv: 'g',cITimeS: '1739211314',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/post\/4175306982?__cf_chl_f_tk=O_choXDZAMA_8tBipPNiPo1DI.jtImK46BEqwILLYLY-1739211314-1.0.1.1-vs2OjahJO58pXHCTwXex_5GB7sLeBcvKlC_sl6dXVDA",md: "paSV9C8kyd9XIg.dsWOC3t.GT1uWu1z0MUZlAP28aCY-1739211314-1.2.1.1-msTJXBH_durIAcSWHK.OKH09tZDcaijEWrN52hxRL.kPphitwLkHMy9D_60m8QQi3DtuyOqUp_nJ0WxjdRhmKIWz5pwh5VfBvLSHJiZ30f0_P1HOb6oj2_1vAY4kNv_TF_TdYDca8e1PWIXKjHg6aJ0lE2W_dsdUdUrFka6b34954fHAL3a5gl.A2SxAig8jMijJyu8ri7HvTi7gZ3cQGd9YforrDE6zGOQzDnVe_1xQRBqK_APldmiXljaz6oXq5IUylYteHUD.6jVAZsCr2VLS3UM_Id0ZZgOYqMz2a4sz6dRHjBXoqpJJJeaoQhbs0BfsXl3eYPeMbKEyuYPhdcdIt5AcIDoo6vxgNNtc73pVH8xrMimeJOukYSNLekrNoesgLdqOJ_m1EBvi.yfdNQSof7V8KQNm3bZwSQv.qQ8WhbT2FxTyFokMM_Sve0kBhtLcHtHkD1dOjMExS3SeLmSJDZCKEjGe1pJU119mWAcj3DBSrx3OJOgzGuWUqmAvO9OxvGesTZEvqJt92.hELd3FvWCCnlkfkyHR2aJMdenfR5BsMgGEQhX5Drqcy5Edn5oqZ1klue2LWQV3n1bhmJH1WtNLXwJDsN4_j6ISfj_7nlb7T21h7tLIJeANaw0CgyTS4lFRQZlsO.km7nKeuLzxdGNkRTFi7ZrXNDHs0.HYZZGW6MhSLUukBWXhM0cinQMV5M2nf6UxiYZWVMmjewUc1FjbyL.x..s4d3jMx0dcEMwqn9PadcIB54AdyUAf3cNQXpNaO3HzTzLOfcOYTcDSDnQktcR6zraoteOVg3m8WDnKvabZrihkhblvkN2mcgz8LnUfWcEai7a9ifeU2829JH_dslGx5OCuqKLc2gHtlKxDJL75ooowHcSFvkG_PFVBM4t3DlUQ4ih6zI.J2na.1sn5QW2EByyy.Cnk1PfXV3v4snN9exuhbJIjILDltR2k.NyK9Xglh.8d6quELWb7uDt7PaBWzLr555zx5dCmOGWW7Lu7URmL6RNGTPDkDVMmnCZ2PYMzDFbJTMiBwkZhhVf9agDQkbeeZvW7XkwBPePJFhfvNPQBksIAvKMns.Wk_JzaVkRh4IW.GAQfQ6X27W_3emsbGUAwyg1FyQZworobrKoBi15i0o9TGOe0vWhFnLI8QuYnExtiVsG87ijDRvHPnTATTLMRpRGL_bhozSdMBQCoyiB5_OBEPsyGnSrEB0YbEo38FaiwLJdXNPdy_WzyJ1SFMt.Y7Sfcpz25Gv4Ku0SrRFKib2stVJLU85s6XFovPDs3ustgA5GW2cQQ26fVN28Xs6ElsJL2fouO44u3cTTy2lqM6JFc23b5dZw.MgpgPMLihZ2XmfaYCtOIe9P2EkVAd1ESwxWa7eepifpoV0Q1_iKigFIiqwnjusani2Dnb3v3AoIePCECC52k9BbCVsl31XIxTbRASfCRY4hxisS3sd_NNwfujyOq6OCFxjDoFtWemjz_Z8AZx71YIiOtXWAkb3Ok96gkwKsvpMZgkwxGzwJKdlGxsfmAFndFPfSqWKP0Et3bgtf5hdUxtUMVAOFjlRBVoGaniEEGGkZotpNPQsf699JeKA7E1EO08fC46v1DYC1ZE81eL3twZxHhikH8VCrESr.XUMomNthQZ2qBUhmua7afuc1U.AVXmNdfMYVJp7Dcyn6UGSs44mJOPK7x7R1sIQYAgtw8AJgqxTK4N.aQTA23hcSuShMQX68pL99O5a_uDigvWNsUD_tdD2DByTgTKkhtHawmQB8gOyyDUhGB9Y5H3IrVP.YcU4WKZ8G8V8LCLXcSpyDffWuk6Q3xEHGADZp5HuB_Emnvhn2LRZsW3dsIXttwsSYX1BJZbknOBQZ._KbvlHnfZPRcxXC1Jce0c6AafF6RG.XE0bVjEGNhS3.eXCLMMG9kL2GU1NZOQ8UW5exvIo3tQyiypw64fpzEvzFVIsm8TCQRJnI5XcSucy6J6C9PuO.aX..4VSAy.uF37aiz6oI7zRvh9yjI6Uj5rRnuiAxVLeP6pj783zf4.CXsyzpstxNMJn9b2fukBdY9neaDBKYpuHQqw46X0yaKWNkrVFEqi3vu3uJQw29hfRaYCgf5_c6n.7l91BanNt3PUzlSIUAyaXSEVoRtDr64curT0_Jrk7HVt9T7sVbgogWeuxKRyL4yuQOOPCDDYG_hCa_zj37AzzUAAG436kesC1HXNyF1Xusfw68dUhDzrxGUbcDqR3QpgThnUd5XQCkor901bw",mdrd: "OJXU0JJkRVXgWbFINJldeiXtAMvIOf5Lm2VIkNm.7k0-1739211314-1.2.1.1-YDszZggmVzEnH3AhOEmxnGbUWZ6T7kj.e7nf.plpeN8iUDoVUDKanA15x7_guoxWDMP0vUyQH6hkqz.fejwJOsSceNcucEQ2rtf6vMh2pdGzYQQ6vjDuIFLNpIsNvJ.dFCWB02DlEW6CqYYzN48SA4A2pfS7N4YnQn6gTUkrLJQXKOpCKaFdBHzSDSh5_CqN1rIJEeNdYi6YXatk3wBeki8zWyO4muz1fi_yaTry2dlSeewOtPP2GWu2VWY9gAk7I05.6Wxh.6NhVdLGamzvZdv3JGv96SM4hY.7Fqs3lTycjoNlGaqVl5r9DzmTv5g3S5uVfSkqaYpxUfAh9_inOVysKYwH5OT4a3mRgNk72DDijeAxL4YqLtjZLRD8x6q84Cqsuax47ntUFdyqhuFYiRh4IWbH_3u7_QVcOBlKp38RuvPCTaqXItcq7jTatYNwg80nQcddvaz_6w1i1UzPyVaoUgDDtxWoqYAaj.1ZTrL7iSrPyocpz_xkpX1S.DkyVs5ep15U.iq6S2xsOKhx9.vkK_tY_skHHj_yVj4wAZSg7zgjwXneaRyV3ytRnyzcSuUly8bcy1lfhHajQklJMhvSULONsFhNq5eL2Fy5kBwytqu44qBu3qc82zTNfdhyJgKMyzZrUWTbPiW5zvaOftrm05qqZtm7IPUIl1VjgVQ_HAXcv5AQGagJK3c9h.aVZM5OfWmNHjS8HQxcFRgG6.q5aftNZc599ahsKd.xjsEHy5vNXOYwcpNtDVpoC2f43t27CgNbfUGlXc4S9rf0.V1VRShqvfdYdqoKr4.fOm7FHEu8xtSL0hI58b17.EHFSnIZoLgvUXzzWHZz6z0Dhn.JJSxbAVT5ZdfnyQKfmBdfEA.uUkeMj8GqkBmyrx1p.i_BIASgCgfj_USGvsMLKB81IV14GYf9DfSMtcbpwH_t96QKJ.LgR.smw.YWj3RlJakPHxGfD76v0zBNZIJnlnfkF5RfV5wTZyb82i3LtIajBGrsrRcrP_hBiFTownwPgLaa5KCCZ7UAXHovLAPUJrXuZO_pnr30wWwljKOd5t4PJGOVrygUOGg35vzgHodWBHS.ucT1lQF93_bnK2at4NE6RCoQGu78W0AcvSD5EGFnT2AR671.2NL3.0N5uZn5mXl3MOGECRcc26KFD0A_7IL15zd2IPqZNSz.cLCwz8jr3Y4H4tDqkZxS0gufTI_FPET_iA0ri8tSD.ZvXj042PN0KJcOZbLM4p4PTPXn5E3J_ILXtL.DPfl.hdVJZZx_rUHYpf.EA6uojUmmTxKQBdCKkNR22CXWWi2YFg4UThd6XYDLdFYWwM7oSdcCMO5dJiXJ94UDKG1kPEeQkGdJ.9JWiA9KoOv7mAV2fegLor5qFPEH.DoDFu7DQ.44oJhY2hu4ge9uZ3wBsCoLgrF0Sq_d9pUylXexvo6ujvBcXgTRNAF1HzQN9EgTSbGA6uOqqrTJ3W9w3uJGBr4DkNKsAGWupvKatdZBgNnAtA5fjv9gMyo4nCIb2yUnAvXEwpya4_ZTlz9YfSP.LEvcTDB9SdGPMjpbBz19N6_zCS26wwORAmhBaSA4WCSj7fVq.qPI2_S5KIgAgArQsvi.ydh6GLNV.xTBgCRrnkOIlvLwsKdgSNUSHgi7.d6o5r58UdoledoPosEPgDWiu9Q2vuuUHPbTk4cXmjkfZgUBHSOowGpcLBsCE9IY5xJOK86hFhMM6WAXwEvVxURPBPPDmxw9seapPmbNos7FsdiO4KwNOH39zfMohAFrdWCPM8UvSkLfDc.YbxILrkmvL410c.kxWBsNy6vduwXbxqtrPDwsf9zMkVveT0aYgsxmvo_8Nk8j"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=90fe155ab9325955';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\/4175306982?__cf_chl_rt_tk=O_choXDZAMA_8tBipPNiPo1DI.jtImK46BEqwILLYLY-1739211314-1.0.1.1-vs2OjahJO58pXHCTwXex_5GB7sLeBcvKlC_sl6dXVDA" + 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