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-5038164972-gov.caltech-edu.pp.ua/post/607631944139

  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-5038164972-gov.caltech-edu.pp.ua",cType: 'managed',cRay: '91001e033cfc07f2',cH: 'hh69KWz3nJZH3SUakFV9w5lYHyiG_hiDR0F9UI3nULk-1739232640-1.2.1.1-TzJZnuTNZBxQn2T5yOcjGkSTLUDTOJgVcDEAmL1QEALK8lxIX.5TfmM_HhvubO2i',cUPMDTk: "\/post\/607631944139?__cf_chl_tk=Zmf3a7HVrlaa3kXk_eo2se28cUq5DuzTh8v2hSGnMeU-1739232640-1.0.1.1-ff1XH5B.vCyIdWTi0mb1WDHQ_uFdlxD5DnHjQ41ApB4",cFPWv: 'g',cITimeS: '1739232640',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/post\/607631944139?__cf_chl_f_tk=Zmf3a7HVrlaa3kXk_eo2se28cUq5DuzTh8v2hSGnMeU-1739232640-1.0.1.1-ff1XH5B.vCyIdWTi0mb1WDHQ_uFdlxD5DnHjQ41ApB4",md: "qcqQ0lIfwx9yFaKPwpxnZddh0YKXXrm1aIVQOAps3L0-1739232640-1.2.1.1-Jgd5OJMZd.mwGQfikT95ofinD_2Z7WeL9SO9q8qgpKz3fOdgc8sRh6VkQZTvZlONGc72J8S_f7fSJE.D7PQzEOZrZ_6wPOnav9zWBhac.xNcTHteOGL3lc5T6iBBeHtvWbPK1nqUHMw5HncMjjv3hI9E0f9RHHcMvdQ9y2PVNM7zZuTdmR4qKWFFP66OqaD6p71htfpq3WQrspw_.WHc0lVLZXsJI4w6wToSTPUqx4SoqdOc55nh56_k33MVxBt8.D9wcKXSujUFk7rNE1U2N31Sw5XJNPL3bHUOUHMFV64xmxh4taT6UG5LGs6Ld6RX8Xhnynt51zncQ.Ch5pzjAk4UMYI1aAIZGJrbHibqCgM1WlMg3Anb79NuGGPg3YyuZ6DocihtJOFIW.qbsJVPXV5jEKYDkI67kwf1ggSaJT2.Qw1EmIx6Ieov7SiNAL9nwCqUJQubGXdMLVHtTavqVDptAGACzhepDTWg_wb8dEuEJvbnAKGf0zt8lYSRZbrAtKP5Yj.FxoTbGuZEcXFrHLYTDVJPrnDruo4HcfbNiY.PxQtm7lNJt3icogUoU1K7UTO7SwJFj1ck5soBDBXrVfX1uow1HMRQtB2_SFN5rpjoOwamjP1Dy8GTPEpWFyz1o6S1RLCjozhK3A.2YY3AzBDgeMTl9GGwHzas3gWLDNLQ2L8RCc83suMK1rP_j9Run3YgIGmELPlvcIPZW6M4NAjr21M84hgW9hNV67xovqLxr2jZc2YnKiWm1Dd.cdS8riZvf0.us8hgQ4A0kxTE1.mMrL3fzTvExbIFW_gM5TliGriO3uJBQrmfIyekVbZTTaaLEMliQuflDBQ_EDmcgpvk7pg3TzqSZd2G_1jPjgCq.6Eta1uq8xUYMvv1an3QcN3RxgkGHFvduprpmve.IjjYscxfzZHwlHbztrAnZa5WTHw6mFfI2292bIT7fBivsc0DnsyLEGcmuxrNEnOXKq_STf53VzyOKGPwd6o0uuJ2AdcDq75qAUvSWNHxk2DDWIc0TGX5r0WHGmVvofCaon0ierTVJ2ajEeid2uCyUnxMiGwmHXnOX5YFVFFaOdAmMH90E7AqtOKQdIVbOEdLSZu9Yt.dQG5G97NFl.GrXY1_Mbc7rm0kGnWf.7FPCmrSry2m9m7BZhXIjo13e.3iX7RyOVwodzZPgTZ4fdz4LbVjLLUO.Y3kuk4vIcYFgAyew5oOMxrgDM4ea3qme7_SbDhvZB_rR1pvQma3EfER7eb7z5.CMC47HnO9OaKZfHDFCOYCvUyddAavVoAysEz51S1WnkbqmPFNjKaTkeMwcsLGLE9wquL3_dc0vg_cVMvhb4dTdZWFWdNgAKlfYJEDXpNLLMQWCzI9JEyjKrGSGK64Cf3XNUQOiqB74V1K.RJKPQEXyFSZ_sStalgrhlXu.eAs_f.BJZvczBhQ204gOn4EyzlE63u82m9RGieRUxKsJLUitipHWDsNkW0NCunuZJCNaDezrs6LZ3SJqx22V0WDG8SX9YwTdOF_qW_pz9fV9gzUAh4uWJZagWxx14oX7mjXh.ysRnj57oZGQ3Slf7t84CcN_51AelEqqtP4FpSKdPxCXM40J5apF3c590oiHz0OWSFOXVPZxPKDJhxSW9tyWP8vhCP9RC7JR0ImfbubtndShy063cprNL593LyrUMWjVJpHsWhbCoevVT5wQTMumxYgyPmGTeaN0IuhB4jlBJ5sSKNWr9DfU_lXyD8QL3jmJ3YhPp0SvCNciF2chyRqYrj7MMSlmhrRRcvP1Iusn81FC_UUAEFd_Q1Q6PXHkHkXxcckRW6NMaQwFPAEq7WPWzT9vQRX9EOxYEE1frV.NkLCnaLA1eFZP.k0BnYAGGwe.Sceb3j5cUUjuyC9ipyxTaw4nqMtLUvmTaxwc3hJdLHYa5z2BUlOLGDumO3qjhR192c0YzvzTBr1RumKCVz0aOoeil6EcCvdmHahm1LRMjGri1E6330eHyo9OwnXngqvoXvdNhn511pQODpOSjecGwmYnSiqsr0qBdWGpzH5t99f3WJHpKiM1XCo89aprECUgNfMxq1YR16CtCLC4ze8sUiTSmYpQtOBEwMbRn964MLCJ9Iz9rGxHC9hVmBu3IPh.NDe0oW2adWRpogwHag2aJdl692RjwHB0o1Mj_s_U0pDQpbOoJxPFLwekSzj0cdz1dwkjM0oij66L5CMDb15DGw3uVCY1j2X15D51oaJAXtMGdy1IqTdbxFqFiHaXQ",mdrd: "ThCdgOVLGRSDd2NmAn5uCyU1pJfU41g1VqLAHenP91s-1739232640-1.2.1.1-9Z7c2DpWCGKRcGlruZsKeiyibQQXOTu_es2oTfjzYW3kXfMp_NRl1zupsyRyQFfBDtVdIov4SgyMEu2NZWalEdX6YnPWKKWahgnS1wvwdAZi7I6I9jwNipYd.HYl3TiXHxM3Ciywjqm3cbF7hBRaBI7WJqo2n.k138E9W6VEA2ruZAJR7N9u8rkDCQvT834hvdowSea0mpybk_XovHHYRCWZ0gIkNffSivNMVGKLMi5YapfLoWqbk8xN9wxRpfy_9Pz4CSnVN_Un.4ODY7R_fwm_1Dx6oqlbrILTUuIxmsWTeHatwEsgylSLxAjWCm21t.FpSEni9gDDSuGPrwSr0YGCyTrpk1f0fdfUGa9zFu9nVB_9YdapM9DgoUazWkC28AQFGb1NJYazV3mIsrUM0ol2CNtYxd.sRtcBghAZViRF9Pg2_Xtfve9ORSj3NaCSq.7kP4DPQvOL5QBjVW1JXV9.8A1SlIH21Gzr5cq7xhG.T9_vVmgZgdNqtNQIksKjADWgXfMGuFugTSJePGQzky8uVpwLufUayKH0WrAPwXka4qZ0wJ.gRqzskfgVQ96zNmgZZ0ZXC1Atyp9pbo1WbRWttrGfKWAoMRitoKwqO_gC_cLlAyY5IHwTGo_8ISM528F7NWHClNsWIBBFL4bKf2wqlUppMpBONj0.8C5RY7V7u_ZZa9X58oNU2_l95c1Apw71b.kZkBJAitN.qK_GtM5Q8JYHYEkxCMu64IQTMspdlPb91S0Gq4UOO0U66sI187OxyDcjWqD1asFjmNYvoFs4caFzp.XPAvtADKx3E4IKfNCSDe4ZdbmnpAidMo6Ss7S6QEmLAUBG5lg7PHly_Tbz_rMB7uqfRLZHYhnVVjKmVlv_jie5OUoSLNIKQqXXR4Z0ehU8Id.BNXtzI1cXRg1b4Ft1312AQPPkbMpTXHxWqO0XFZ_l9mSaonanZMYhxglLz6T3L1qleOOVu_pLyXHCgmJUz6iIWUt9jiPbCIPhjeVJeFZ9muaZcKn7CXxhxok0xgvEZ2A2FViS5FKSkXzEvJGLFxziiQ9vOqOsBV6EPdWMPE2Bvvi545DP_I16oN5vW3ejncBFnoj04NNJNAXfy58hXhC37XttxM8SDHNqtAwNEzIxQr9iWhfxy0JEvwFECvehD6pYY5wV_sUy_PUzTKNNE8Op4ysl7JAbvmdSxQkJGzXCfblHWkkqyXig8NxdHqEcxr8IEf6GE1lHgGglmyGv2sDNSxAiqil.d7K_iJToRXmO_nEHvffhOO8DjfUGzShE.BdpInn.KoAgsRH0.uHBeSEkpDe4T5DpvCBX8rYc0ym6MevvCO_2d5UbywHdCZ.GOMskltMaHeENJK1ffNAi3jMDLcjuGXwYK7yOc7_f.KEwwMqAmGy1DIBKC0GXWnwYTKg8gXEj3Ey9KTkgBYbvpyvOfuVEsIM3c21UEwIBh1R5c_csgZgDOFWAtQIXW9wBJI7A_vlJ5z8J2C5DL5rL88srhIGwNAnPmXkpVQhnmQIAm1O0OTSS0ZX7calLSmkjWQkaigVkrAuXayDDmszuQ0Jsq6nY6bC1IC_oB61oI.g_p2DmfBqJUc_vGbh7ZeDg6VRn9seiHsJ5d5h43IhxnezFnAQwtmWTmPgrMhCbDAbTqBEhFAhKy9XiJoYOLkR4QUCTVyMjHJlaObw59lITNGiohYyXgov05kPEcaoVghKCx7D9GSHLtdqOLkO0mJjALfAQuk3Kg4l6lWNa1Io8YWFvj8nFzBB3xEm4BL1cWFrYLXTGWM3sX5RhAWSNRrBWI7CrC151bA4MtPEElIwcfIUR4RAE9N.EK3Qapvb0wpVF26e4GmFOF2rb"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=91001e033cfc07f2';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\/607631944139?__cf_chl_rt_tk=Zmf3a7HVrlaa3kXk_eo2se28cUq5DuzTh8v2hSGnMeU-1739232640-1.0.1.1-ff1XH5B.vCyIdWTi0mb1WDHQ_uFdlxD5DnHjQ41ApB4" + 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