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-9540827316-gov.caltech-edu.pp.ua/post/540077743345

  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-9540827316-gov.caltech-edu.pp.ua",cType: 'managed',cRay: '91004bd19b75c9b3',cH: 'fwNIci9o3aPY61kzH_HzBRFnnwH_saBw1BmYlabZpog-1739234516-1.2.1.1-9YOQHxyfCy1WgaYK5ysofxDA3zO7zqmNUY.GBzf40kR1UiiZxmKH29jhz0.6lls_',cUPMDTk: "\/post\/540077743345?__cf_chl_tk=6A6MXELxp6H.EGh5TnXUKHOmG4w4jeSqMY5mMrdVw3Q-1739234516-1.0.1.1-PQSk5WJcGPbTZoj1CP.N8_bOHWGx2qW6cUF2LQ5YSJY",cFPWv: 'g',cITimeS: '1739234516',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/post\/540077743345?__cf_chl_f_tk=6A6MXELxp6H.EGh5TnXUKHOmG4w4jeSqMY5mMrdVw3Q-1739234516-1.0.1.1-PQSk5WJcGPbTZoj1CP.N8_bOHWGx2qW6cUF2LQ5YSJY",md: "2jm1S4GRi0tBy6VcOpeNnkk4B_lp7jTvWpo7AA6teDk-1739234516-1.2.1.1-RJpIextPIySt1QvK6gqbxBd8SCqW.wYVnjKPzvopZguZIo4dfI68MzhNsTutdgsB71p2D6idVA_JTykODvtMJii7NFyJBYvHIt.Np6.3tmqRIOHaXxs75GyMBqSUkY_WuPQHRY1XXd_58dk3_lQ.M5qif87apCFZLl2EI5vMYYzp.AJeK8iUSFRdN9STQidbaCgGWIkhVoHBi1sDW7o.zQx7J7_rtsjiL1gA_DX61M7E7_qXiKvJVeP_LnqYt2M5X7w31OYZtvDowXLbH5FTqV9xNiuoQZGc1Et6HZxdRSFfsS4vZCfnUgX6mceL9EEutjw3WkQtyV5ZbGP2lxCT_X0DfHS5vo4AbK3ewg2ATblmXT.foSGUB9UtGrrhFAlVATZfTqHhDHvemEi1vPBnXIY1uP7hLvurYVGMqcg9dd8mHlTOXYWUDGX10S36mmgFk9toPmeNqO5K.S1A2kvHxqapfgv0kbNczDS72SAYSIAk_Hz5qzuADAldLaYCsCvcpTFVgvAuAHxyNGxmcvWXrWsZgBBjTZzmhg5G3nQSHMZRwalLAx.mOjWubECsTsm4kwv0LJKGz9cnTTLm1utJTlrKGNz_UWTb_9cII8P.dCQhPtgLTwcUJsj.mu4WjiFdfXroUjXxJbYVeBwvZokxg0mOknaFFVewgvAxAIuryvNe6PB9onCU1Ns7kH5hqh9aExC6PSnPqH1PugdNF9V6QDIGf8HbgUMWSyPthDAeS4cZDVo1JbMzBHgLpWV_78RlMQgAGQRmry4UMmwj0URo6FzQdhg3B_GvdUrbEAjz5Xv4IhcAsBNRcgQ6baJ91lPT09IF.9OTNPCyj1L2wBsdXmV1f4qHv63K.EewQUmUvfpFOeQwBne_bCmBhf8_aBzPprJd2FdtSdy32oXuK97S2xx_VtpSVG_B6NvdakwJcJ9qQaI.vSSfVazvgTtD1eG9uW.Jrv9dRzC.9XcBwCKg1.MIT6t223JJia3XLx1_mxiKiMwApeQVB66kqRRb3jKuZ7A.N3KDrCT822s3YatWoGgcheaiAUa9pYKsyts5oMwcrTVAUWWdotpdF4jmL0lhCZjta0X6a6ZRUJ2Ym4vYBWHUsvIRwLTMpL.DSNJVDCWq.EgA6zbILWnGOWETJxPJKYhnRRZoZjy.wn8mhdUQerd6K1P2PlO64yy47_mKVGLAUWHSgVXQqLIHcqZXUWkUAZxvYzSJkYQWVOGqdehdUZ5jpNF6basgsr1JWNlLUnUrFEDVaaR7ATwAET0RAELW5cxHzvDJMnjx67QFAc5ESB1aRqTLcflXQcwY6h2q3gN5ZIbm6aqZRao7nH9RSXA4NUXofpj8ww9LJioZX1jKPv0P5XgRWQduR4PpAEAOmjeUYY.8ajIzkpReEdVAd6TR32Ytj5nrngIXbs.V9mNhRR0RyNLb93DhjFv0VMjOujmgd1Jjs1AEMhy9A33JksctNuY_8g47qZwuJjXmUlbwfaMKXbZfpRbKFfi.BS9bfzRKofDsOC40qRmSWwrKFkxsqCOLrqQejO1QzMZDkP.0y.AUdErncJSGmhWKDR_jFRGwPdEIrBZ9ZQxr7Pr8ZHI0QmQwvF5Folpr4KOoXl9PHupXFEFbjUkrOIqA_1Fbhr9hl95p0bJOVtd4xG1fsAA5WFOv6tr9buJ11Bc1qUFx_M_AFBYp1Eva5hZtwbWK8qHUnBpcJrwrYa8Zq._fkkYKZrhxzSpN8oGZLUEwUCB_Gk2VTu_ULv0ZSNUd_G9JYOODen2GKZQmIk36eQvy2Wc5NKqQqueKcXmuGA3UMb.HLSm8uLzKQryTB.nsHjnjYFDs9D8439rde1Ujbyks6PC2_kgFLq94bQhBTlUQy4xJ6W6NLfdU.R6XiXIZUpcZjYNRjjPW4YNO1Jj2MaQgMzHIy.AomSba_pMRY37rM1EjFEOjrle_YMBhCxgVwQmHqRGbQcEjIh5fjD0YmvMiEyxMdN0ePI681rXhwoq3AyLQViM3ot_qjfGTQkC.9Wf85fa_v9XbThv8eVwe4LD.p4xd8nKk.y_LmgpCoXZX02fKbE5mMiQIw9fKSokpWr5ybdGlIMxLtqCMAG68kYkioiCdczb.7RDS9iVbMymtWEqXjhyFUGhaqFK0HMbWaC8J0EILQMmvOv2wnLzaq.V99OMuKh7lAaWM1hcO1eSRxgUtj5aUYSpW468SPUP.ji8n.yt5qjb7M7ipWFmSrJD6D8IbKYM9GWDWypVjB4.AUKWzOw",mdrd: "oCvYvRKcd63vZn7_yPHqaHCNQNsGhu0jIZ2oy7zN3Vo-1739234516-1.2.1.1-qbUAl2WhQqfcMwDZCETMNall7Ybwhev_bEEK8Duco_AsNwE1FbqZXfpqV.ijueaE_j4bC3E45gzI659vTCdDL6VnaxFCUe_ZU_BkvXNChdM_.a2kJrwC8sZ9or3_PCwMKMPYlmRffvHVc9.UaLTporbCikG6VxQ7Bx3EoBzFhn4w1pw_3WNMgz.er8Eno6CnHZfM2HK5QoGI34cdAPP3fIZ60UUWv3RsJxXK5b8D.pl8ehNHnloLL06Bw74O9x0sOcfsTfkVJ4k2ye5blKnKJ5XTNjyXVD0OyoKRi1g88B5I.gRdzaTV_vDGKoEH64YFfeOmp25ElWBMcp09vdEITKSnpbaW7ex.LbTRsOxxEgZd5hOJ9hoaN6piTJgRXYabq5l9zZIlMnM5OupTGKISInK2Rt3FVwU_MgYCCLW4BHIcvTwuvcEMRBveQ9OqGSa7hAPxxtt.M7S7TnPS5xXxNRBxgXKGuJ1QA1fEWKwn1eTco5DYlFDtXhlFyZixqPH5Qe.m4IEHqVS_2SQvwyWoMiynaw.OQ3_tSA2YtPqEBZFGmliMPpm_ySqnRkJrxCW04XbohRvpbT0EYTijtUf1XOgEqsyAuvivLXwCveVl.xTYVXqvgWcaj7XMPMAfOXYZ5vIdDlaIAdRzSSMoIuoPI.JtPegvHTxjbrFHO8aYQa7Fe.bY0k0XwO8Fl5fGnork1iOksfDaWkaIMTbrOVO8jV1yDgmEABL_Km.kItzMI1xu30iqL0AU_MKGC5pu9N_E6G__toGliz4TYON8pb4qeAfyeDQj2JS5GjokKyGArjwpkyTT44ztI0N0MJzCwf1GFIOfqbrJ2G6Kvb4YdVrLq8n6kyPJyjO_01DQDZgxGPj6MHRqrWtF2AiWoME_x15gJbSJdw5c9n87__oIqytbV4SlDyby41_thWqnzICOp4Jj_C7R.60sOpwu9aqAy_5uchc6PXL9s3TMhKKXzb.tPtTPdKthPIXMyE1fqw.Q4lnX0bcg.VyqwrXZ0K8IPWLZvtN6svqmdTgRu8XEgg4CAzf3RiCN9I2mjGSbErz42D.vF4bntIz3PsKvP5zmOoRWVJW4i3p2JCpgjTupvbYgH0NvQdKd6irm3jdWV8U5IGRaMYurvdB4HWJ.7vn0o3aZg_EP3evQ8LX7f8k3hK55DVs2uaMqeX1R4sk84OzTU0v8qsOB_1EFpcjSfpgWkZh_TRbu3A_qZ0YqzjqVTuXtyZVP0xmNcNqr.q8uUeRtBSIk.YzubzfY_lxHonYF9hATwUj0gfRMautu7NeMyyGIq3SpGa9kPqo8Jp_OUxC9FZm3rwsiYFIe7SLdRGqHtgfuplAzQ6KhZKLuYoSCDP5kVT9X_PTky5n4PPYUbdXXf.QnRHDR50ttMXPkS5udzspQqqgbU_Oj0yPGVJ1i6UD_Qefyq3r_tT6kdo70s14PdENAZ7u7KIgsGG6tvz4e1aag5KIJjVQDXeiFeyKlFpDdF6fMMOqNBV444TEcQKM5HV_Kybh2Hm3Y8usKxvszomWu63UCnRZUB0ZPqMjVrmV6v.FXuP8Zy75xSv.neQDuF.LaRB5A7WJEwaP5sC8veHceWDMDQsU3Krg2f0rsAFM9aHo56cIl7sEeIkwx5BrgfR9c_L8eoEW0EDb1lTxVpktSFXF_uvc14sSmZZCOcQYuTjrYL.p0JoEdnaYeC6jAxreucUfLxjbpJ2hB4X9gcicRCDbjFZ8CJ5U05v16CvNAYMrlbfJLrIEtFoJUfXOf3BiTQ5XPPEge1GjNSZXdtf8Gh6CYW3bhgHIsbo6YIsHXx0B.kccll8mF_XndRTYlJMc"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=91004bd19b75c9b3';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\/540077743345?__cf_chl_rt_tk=6A6MXELxp6H.EGh5TnXUKHOmG4w4jeSqMY5mMrdVw3Q-1739234516-1.0.1.1-PQSk5WJcGPbTZoj1CP.N8_bOHWGx2qW6cUF2LQ5YSJY" + 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