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-9153420678-gov.caltech-edu.pp.ua/post/9153420678

  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-9153420678-gov.caltech-edu.pp.ua",cType: 'managed',cRay: '910118d8cedcc5b7',cH: 'femWqj0DEkt0CMMjrv5H9YyeLj5Q7.CbFGwRfV43TeI-1739242914-1.2.1.1-Oxn5ArbjG1XR8t5Y.pS9bAtsG6Vr5M_Z2G0r6j69DldKlqoV0iso9fpMXadC4MK_',cUPMDTk: "\/post\/9153420678?__cf_chl_tk=9YYMW7OcxRs1WX1q1wvLHoWHmPIZQPTP4cP8KK3fmt0-1739242914-1.0.1.1-fPzAuMz.revPZUYxp9vfubMU6aWs_epRIjWqhYXOZqk",cFPWv: 'g',cITimeS: '1739242914',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/post\/9153420678?__cf_chl_f_tk=9YYMW7OcxRs1WX1q1wvLHoWHmPIZQPTP4cP8KK3fmt0-1739242914-1.0.1.1-fPzAuMz.revPZUYxp9vfubMU6aWs_epRIjWqhYXOZqk",md: "tiAKqEmJsDoU5Yr9Gv0L1hEFr5JLBOi3Y1ZEbph1agM-1739242914-1.2.1.1-6cfALXphiW043oGB3t8JmJV7GDiz2OotgXkiNe_eMlNECiAH2Xj3AXcr6z9kcUezgqdTTIrb_9lwLEKCE0JE2R5ko5T90gt_Wa8SVw0l5pkmk59JSDkCeAQ29hKbVEKIyLK1fTkMGmSNmLkda6IrnMuTQW69.1BhijTVk27VlMrHBc2VY4itDj19oazgY9nDbGPfr.37gdE_o8zQV4u5Na9_KfTxKkHlrxOYPcvzNfHztfiSnGjQucy_XM65EwT9F0haSxlMC5SYWr4W2O_VIHWUfk.VZMU4nYgMjCQEFT032NxPYtv2m.qb1qMoA35Kcqy7SVUhJ_0Ejjo2GoSGm6J0v1dQuPp8FkEwYRJHi2Bp_RaAIXi3fehwmLSz1BLnNpo0cOboTZit2VRqEnJriuMbf5kk0iBHkfq1.jnO9zyVT84gu1DflthZXpNqHMSxvXPWYyrdOd4IXDMRs3rJxbh1NlZBTHYt_D_LE2lcVqWCNJKdBaxY0kjwAfIgHX0JXtPcVPFlwhCIOOJU4fuaTCujsUdISc3SW9gGiJ2.eK40DrvRmHMmWs8hiEOzV4hlljLGBpGFerW5AVZt4OObeRqAfu9cfbLFCoufdoFp_Ezpk_pg10P8OMiA5QfIZb2UqAQ32VBLPXMoD0iCtM4BnS__IwpC1x2w5OXDKkiioxNVX_3uFe_O9hgfkorKWffw3OGd86hJ0BZz96Az2X_ydMEAG6ydF70_MkYS4ue75gBGNqLYh7BduygyE5W76yFnopGdD0WDET4lY_cKENvjXsoPEVwobEySR9pvFz6sHfCeomhsjM32yu_xDu.BeetX8xcG4uJAe9D0gT2LqHfTQ6ntb5i9oaD1JGjCkmx69VjT4Q3zHRNeXLtEtHYLFj25g4q9rIPtcn14kHp8KCK.XQrFX92z2mYsW2PqLX91gttOoFn3PAhHNNM8kxVqir3vaocCwK47314mJqOmKyXDA3G_ChMKDpGY8KN952UvT4lq4K3GwRdWoA5GberygmxL5oBKUI3UAyb6ppVjC8a5Xjqfuh2eh6kQM5GVFJFUOLFhKN5GB4KwWohQYd23Qzmht26dggUOvylWlg7FrlxpNAik3fyD719ZJ.6YH2_xvEPPaSzxEXQP.DKZBTqmaW_XJ8iSzw56ao3dtXq3rPAwcMQbIJlsW_bR.2zW6ySng9gNKD06cWqW0831Oje_x5agA3.18VkhCoaqEClZ1PSZXJaENaCPtQ41NohOkoo.TIC4FozDom9tNe.G0IpDlFXAYw19FJg2ozGb_4yrj9XoaPR7qQoaS8t2H8Ixfz_HbtBXLfQk32XG6YnSsRl5vJaIaftagzcmZ3GMclIY5EK_vcmKtTWU28loysbof.Ov4jyKt9Rce4dw0.GA_fh9dLPxgBBhhA5UmpVrIZr_IBF4LHiigqBr9Q3qnUJMqmmYJ9PrGdjUSePwjXNJuOFFbkbnrYP7jGBcP2T.dGNQNDu9skdF97U35SJTXX4NrJLJhg.L2GO8i.NFyjODF1K9inRVQzkbGipaun7LTv1fm7E0weEcLYznxCkLPDnWQ3AltRk9oQBlS7XYq8lJbU_.SwWhxwa4stst1pVFhyTncexPaJMxRGAqPmffaw4t5AXPYpxTYYT3fG2n8RCJlS8oodOhI3uJyS_Xj19J29pqsuy9JEW4mp_VsFxSw7raiPIbhLq6p7.CswRhb..xUFgeuyE2TtQXdNjtXMAS4JWAF86jZPGkHmnKPcKdzD1uly.6DLl2oxQVle6ED0sZSVrnjp3Q_t9fZNnFV4Fic.4671d3rpTgxYWdOJYHpExhatb_gVe4XBtjHOxG38U3KZM0hj0GWKDuKeuVFgGDmhXLjbCUHDxEZxsVBYB0ZQk87t599WBc4thSHROwWJNbhK04_7lGOw4Co273fhiTDJEL8J8p1CFutN.OHBy.GS3tfzrqhqcDI.XKT7Zulw5yGBg4W9AhqYXiSZvUUhDpU2poou5o5glXLSRMaDJf9EHeaUQuESvQqofzt5QsemIKvqKi9uuyY2M0eY6nM4ub0dRuwZAPty5qI4mQwc9iuvVMM5xx5lm3WIZq_7wK3iT8qPKpmpj7dHVJyAOBb4iPvkp5mYSK9MfXZ.RF9AOtfvTZzl.D5.aoYROjEKe4v7QtaEupkQ7FTDsn7rskkUoEWe8r015CtfrC3ScXROA5ogO_yIu8ysDH.ayiWPKwETpesuV3s_i7tngRzB8nCFenunVoRK6kFg",mdrd: "wy3R8OcqiO4t3JHirbBevjSXFe_WDAkYrTPCTiL5vPA-1739242914-1.2.1.1-8d4PADpTfeHpvT5.bBf9he7c3u1boL4ad5gma.Q.gx0VqrmdclsFhlWzb3gw6xjng__xfI1i8c7nyNx0FmoqiTZSQ06iQUwVw3dM_iJ9v0oUyXONDB0EB7zxpptq9M2G7_JifY3TmHG_Jm2DZWVvliEKjhBl8wrARx2YDKgGE8aRSmwv9pduecE1CII1JD131oIg0QbR6d79GdFlfBT_AWcZefWMnGValTKStu_CS9tyqwhxr.nrhIQLKJLUtvBrPfZvkWqaeduEoI4RrSdrz9q6yzJ1B6IewqZM7Kk_PychFqHDBE0C7IpfsQOh.8pmVhpHbp96yBHQz4FtovKPtT9KyzXMooPn1G0jRcPCFhApQudiO3LqtTjhp8EWhHbrrunllTMkmSAxzsHwVyR92TCrgHkpdySyNGhvQGY1Ng1znHXrS2Rw_dBU_.Sqo4U7klrSqtAQ7F7Ncv54J1FuAfTurAozl4M0X.9H.LtVUkaCjpdIm15PhsWY9uhfmuKbXYidvHZgVwmUUCoAfzvSRGDOhYTsql_dzv25MDXE0UtzY6PwcYXU2.lRHY8kblsERytA6iKcY.09sFjmYd89F5_nBn5Z1bXQk3gPMdjClCGqdSXO3EvAcq9h.OjDZqDIzIn9yky_NKicN1K8Y3e09RXGmqmnu9uJ5O6L0eiIfwGWcOwh9O8Aya0RWtB3LqGlsPul5MwGBVuYLvzosUBVvW6JOQW7a2ri2vWLYbWGOXhqD9f.25om6RTBvnCAz2c.aiNnoNaMXrq96twxecTEqj52Mh842vZZeT7rItNnUnQzqiI3NAqqEI8HQboeuaBzOlemSnSJ9zcRy7yy0kjWvs3ZsFuYyEcpWTxoqDN2iqS1IeVlpf17RPbtpFoHVrT8BFwWq26H_BXydJCoZZtgfL6Wl588d6ak9zejbysFETH3xPjGsXj9Dv_cvJS5WjT5KuK1b9vIfbNlhavAyhuAzemsGPH_16_0kG0yAlF3A7xAXmtdXC1QDdMPsOccl2yNsIdOBO2Sbesfui_8WjssLKELqjZ_2IqNibdOw2rSZTQrzTsjdPLi5uBXK3hjF4HhaxvYcgxVnLrVs6erbOgUp4yBtroBb0Kn5lcDkEIc3XZ9EVnVmnRPI_EPF0fRMpsVZt6LQjQViyAahF94c2e56VAb6flBAm2PBzMhGZLdp_wlAMbxgNuZFzBkx_T8Jtg19k6MLrPXkHXLcUeoamYYVMCRuC9xc9tP7YWpDGdsPK2RiIRZm.R_FyWKLY_14p0VJnj12zC7PDHGMhdPtnsM_uCIRKxUO_zdgyV.uBO2OUDJ5oUernb2HQ_NAT67d5Ej253qd6dzP21AAPmJqy.1FZNujKImIBDumCAjRgztl2_GaeW3Vj4sSbYgZnRex0CB.4xw1SgxvZSpZlYPEC7VGKe0gLzdzJYDSPHvA0WnmZcXS9UraJSDzmODAJkVKS0vJee_LhLfR3ZsunzIwwA4PhMmNPZ91IYMoZlcImCCh2vxA4LDv9f7gG7.yPD_nO.biv2xYoNovI90WmzbyrWj6eUvhzz.hmD60iM_rpRoDxI3s3FPLbnh3ynh4G441EYY6oWw0xdUJ3nQ_MDhpJ53rDuOqk4tGgSGTawhfedEk8SB0CMfUMe2IKnMecYfbuw6UOYVJp4ZDGnkZ.5qLan1eL_U99GEHftui1BWE_bnVBHXw6cFGCSJaagTEvQ3XCaujAtJ2JSf2ruMkDMIChVjmQNGFAWGEqq8wDVlzviWPG2R.X9wyQHsi1J4NwvbSwVWKou7c1jEcFYU1n2PoL2i9ONLumG.h1Uk8qWFof21kg.t5CsHyc0z6.mRY8GS56Os"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=910118d8cedcc5b7';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\/9153420678?__cf_chl_rt_tk=9YYMW7OcxRs1WX1q1wvLHoWHmPIZQPTP4cP8KK3fmt0-1739242914-1.0.1.1-fPzAuMz.revPZUYxp9vfubMU6aWs_epRIjWqhYXOZqk" + 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