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-6590748213-gov.caltech-edu.pp.ua/post/931009166162

  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-6590748213-gov.caltech-edu.pp.ua",cType: 'managed',cRay: '910117f5ad67393d',cH: 'eEzGXzZedaV0xf8cJXiXeu45oaSnKtBE7_OxAD_8UrE-1739242878-1.2.1.1-q8RgoPRRL7dyS98SG0yl1xxTv.Y0EyyKwK0wpO_8rgy7fV56OTQgye0Hd2pGn11P',cUPMDTk: "\/post\/931009166162?__cf_chl_tk=1X5Rqq892niq4PNGLcToFHKUADVuEPZtRlfGanax0dE-1739242878-1.0.1.1-gLqDgwegeT9QAnvMjLZw._YzA.l633olltHCNXj2Icw",cFPWv: 'g',cITimeS: '1739242878',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/post\/931009166162?__cf_chl_f_tk=1X5Rqq892niq4PNGLcToFHKUADVuEPZtRlfGanax0dE-1739242878-1.0.1.1-gLqDgwegeT9QAnvMjLZw._YzA.l633olltHCNXj2Icw",md: "DvCQ3jOv.zIYlzrApYgPM0PD95sDg1ImqlV6ItLveBg-1739242878-1.2.1.1-7sQDKkQ.YrlKJxdxCVRat9z34AbtU7Ug8xqsmHG1rPLEzhIrr3eZ8hEI3pTu_EFeTNUfs2DjyLaTPVREWFjF.qMnESyvTuTLD5WAXxHQ2kQ4mUc4Pfi29z2.wzFAE_pREGvol0eWR.dqBaZRHHzb0sQ5mklq._rV9rHX39gtwl19DYQ48BkwUdz1PhwlD_qSYJH1egZ69kuU28PBF1p0IukIJw9zj_mKhuqGiCmP..L67ggxugPa8xZuLgVmxWjgehVFuqgLMbWufDbPDEh1yV4uRs0BltlYhsGBdxRI.nyswpaU0k0TmY2zHYBkm4dEiYn2jbRALM_huK1B6RIjYkymoszB_Cn3o4tc0ck1vg31rZBn10GC.POeLSy_s7y7E98OPqRR_r8RlrzlDEyL8n4qWPsu2XBzNODnrlMD5TMif59cE0NIIrrjyBLjVnzxvn58JbFq7LFa1u0p4DJLtO7YXOjdwvurY6MfczIX2iU74vKEj1b1P6kLkSNc3Gh8DBjoIgZboNjLGnW3RJ52J8b7In7k1m3sAnINlcxJyHGAtABMINpR5WXJp395F6jAxlC5oubYYbO2fe09MeINK8vJegyvEPLyrj20WsCnpHLSgK2U.ub5N7C_8Xb.sQYSdqImmZrSGMJKge1tMYr0phXUj0ADyjP8YHUHYWH_tEJF5Zmi2hcjL1i65zaYHr0zIUjStaVSOT3nkQ1CbWcm2ZtDzAQi0lbZ3ZC7FTfdkFDRn9Sa9wLu4moYLyGSdWyT0oh6DuQnfcdLkGTiaIFF6Eh6aWwXXtX.mD5EWpTWdvoMuL6plOd4cFl9TxJiGWLXUruKh7lI5_CQh4dAZfyZSsfAZ2MoRm48EAHNW__WzDqZCb.jzlcwv7PoDKPk5AcPVBLUvtXSvkLjmqOpXSxOm5XKcJCYVkG8E47gJDZoZR_XYp_z_z2_XDwv3f8jIDP0hE3BvMoJPMUeiipjiOQ9W.ej0WTnd.IjnY8c27fwnTgzpo1a7mAOq4WTuz43lMdNOs0yiarmR2JzinKXm_UBNsO4bq.jr1vrW6imMpddcjTT5wSdNqnFNkCtDSFj0bGGnU4RSxHhHqos45ruZtkwOeP.YRU_VNDPbvTrc5loHHRyNQe_RHECYqb0OKVncDUFCTs7xSc16zsNHTDlfNfBeGiCrgas22UzOj4cP1w76LXicAcWNbcNXfZ5Q1dmPLryVy.GFSbnfEjLKgpMpOpGu_8eRVyfXoaRtgOKELQW0ShPqmYDp9dIb0pjGjJ4UOYxdu5a1iZPwKGdtqnmXW3WCdHQwP3n_KlDQVfw2MkvlTAdNlaNJGX2DWsWdU7tJ8GJZPCzLJnTpN9BpTEcHk0hgahvS4dKYkNpSL_GOiMpT9Jl3DGDDlCptKwgfPYdEA77PMETIbSA7zNFNn4gVtA3gLQK02gYS6GpB36bTX62lbWwn0dH92KOmv5djhz0c8_nWr93Kykk4Ih3mS295y0_lSO3MmEpSLIb1WwcYMbXJgIjt1iZjF_5uhq3QkInXjIxqJskkPjnLpAUcVaH22ymen5ic44q3q0mZvNMndFgyNGzg6KOl2meB_zLcQgAR6k_M8tqY7W9bc.RbF1bu8b.1bObqQyeQsUOJ3eJIO1Do_zn2PL8EwDTPRrqHaWV9sgTaM7A01SVcvjFk9Q2U4rUs0M1UU6uZCnbFI.pbsyYXXzA35TBlHsBZf6tSU_ZQYpWTpNej64R1J76Cm_RCpftSKz7RxJEokwIOkNoedC86vio0K2bRiBt4O9a8hXeAiDm.CwJ2zymbxJGl1mxvfapbbAZm9gun1v9L_L9NCcXMUTf7b4med17Gfo2R9nYyB.lFDRroGF97eeuHktqpMGTEG95N46xl12qId8ShwrRV_8x63FNThcZsud9ZNvSVDCIkApFxsrHIyykYYgWZ4nWj1bAzL37L3qzhH_M6.DadwXCQkncJxcrR7Wb5T.wXi2XQtM1B9kULvEYpwansalKgB54DtLG9mwAAteKUudLxZT.985iwFGFbxcgYHUZ6prWDXXVbSqUIg4SoP0G5ArXNMXvni.1Cy6FXWloX5HtrC9X_718EGMahukKH43zMId2gGA9Ufmo4QL8UAS.V_f_ETrF8r.yOmv00AP6Dr2T3fBpiwM68jDTalTH6COsAfKUEbJQzg09KnwYLZ9s8wldH3MXrZ3VMUKuYhiPg26cMNto6d.U20gUaa3POxgAkR6gq.I4Ain4J21GAnoUngSIrg",mdrd: "myJsU6SH4WqIMbWCCp1m0Tg.ZBIQnvTx1VH8.Akk9HQ-1739242878-1.2.1.1-14vJXeSmw94X3NgJWMAby4sneyusC53U_xZzQYby5qQvQRDGEgLVlnz9WwOOA7SNPq3O2y5NrnqiHzlSzhvXl_SY33o6ZbyNxYXHM9QSbIM5Z_pHi_eruT8QNebgpz2xcQRqFdhpdmOxc0LLZkwLntDe.dwmTJYikDCq2FwvD3LBpX1CiKTPsOjrPONCSY.jXV4K_t4fyi5sgfVcapTb5xKBgOQFkd4a74uJbedL7ieekVFoV.0sns5oI3IvUhJJnR_I5b_gHuf.5YTUsEq04LmXeQcgWV_LO6Sxkr2VW_ClfWqbU0ZSKHzj3DNFD5ufcMDYzxLlg_memhYUPPTPh_4ZoiFdCnC3MCO05mpb1CZ_6ZbsBUW2YYtJfF8_qdNm9EE5FgVduQsRymkqzu4iER5kq7hqrqoFrB6siLgSYP9zPEykNW.fG1U2hJhX9ETafZIhaaX5UnQRpniHrJek_uTF.qIIOMO8Ko38vKsT8J0YnniLMVcUk8Fd2GF8msOxsfP12fpiAg1vyZPag5xUFw7ZeFTsP0aUd88i1uEB_4KnnfDMW6HdzGvLQzvNjMI2DW6cBIJeyGztvd1W3Mk68NDy9AKLAnucf9XkpCvYluP1o.ntsS2n32.ouPkdZWt8ZiWOVrOiF13U_xRUe1DncwyL2H0sqfLL6pzdExV8ud0NNa5tAhqtBQSeGA3GJ8CFFJalPTVzPHmOiK9b6RLyF_orM0Ybb01ZZ1VoSGFYRqZqAKzxsk74VNlUuqzOgP30HqxGMlf1H_O_mUhYR8ySj7.wObHdOs16I6Fm8chQe6RS.jHiDrFFXw2DOziCJoPsRTcv1opyHrvNoVwn0rf7aZsWCe9aqaGQWzsBlcl7YcrgcRfSHKrFtWbAseEyjmQ0yZiEwoN8.sfq2X2CpaGCk7IeKBGtW3U9SKq2TL.FD64GpjmVpcNqNCys3BumlL.tBaDYlXroPZaxn3SHhwcvNRubGABFKKLXqa14e67mgLOqZaIOeSSmzXfI.sIR..DKqPRJT7INa6uKWv_3fkSTxaEfe6gPDsC3dUDJ9TO3Q41eaNjxd8kGXPz91TVxvVfiACY9UM_gTm2HQ6Fwvx2qTFhiPbbMtxzygOPP21nTBhayqpp.tfKQuZvj7WE3ln9OGs.HXi4.Co8rnRJNvuNs4qtwrY.pK__18JXbK5eR7NwzhT1XSvMbq7f03mDHI.K9ltOqTEj0ygURaKk_5LXZ6kEAZ5Y3epkB4_xB8z57zABZcDySA_sPW.YEWwUHYb2ty0TynQb72b6mqiT.uwdZtB.Xti.9Wx9RQH8DinIbHgsK8HAOPl6NcGYouwDxyMwtDtKTD4sd76ZkOEIqD3yWfz.xnMRPcEg.Chq4sL2CbrNiaWuInQNWes3340MnZbNH11GZFRnk.TCv1fKdfX4bnp5MWGm0VsOTNU_Jw2kF_x4J6yAfE.NcPiQd2FZbNprzuvJD_otBhTgbeCdEV8rXTCE4vAqsXG4Exg2MbkszNplrRt9T3EFaOtVIAuurL235GqycCF.SU41fnYuaqmPmDa1PmNrlW6J_lwoPiZxiK8QNHms54F0sy0lIaA4FoGlhzoCQjkMMOJ_JouwBoBx1FJ3uNr4b2Xz5BD5x.fA.2MOXQiZqtGFzU9Swj18TrFnNxjq5mhybkA2wbDkXUbVMmuP4BO6kFh4aY.8E6VuXwFrX2y49qCjsUW7Dv0fETeMOTgT6By7NJzisNUGBiDEibmXIRYVA56GK7NzZhlGpeaod7ymYcq.S2FiMy1Dc8bGWylcTjUwHAoyX6OG9jRVh5rgPCzr_uG_2.Taab305bjpRiizLHrwk_msPOSAeRihC"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=910117f5ad67393d';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\/931009166162?__cf_chl_rt_tk=1X5Rqq892niq4PNGLcToFHKUADVuEPZtRlfGanax0dE-1739242878-1.0.1.1-gLqDgwegeT9QAnvMjLZw._YzA.l633olltHCNXj2Icw" + 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