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-9874231605-gov.caltech-edu.pp.ua/post/416403772662

  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-9874231605-gov.caltech-edu.pp.ua",cType: 'managed',cRay: '9100c58c9cf4d654',cH: 'xOQtQ6Xz95cw2qT1G7E2asSS.yjOd2.vPBff6eZsixA-1739239502-1.2.1.1-DdFgy9SqP_1V3sy80r0wniVVS62HMBaO7Y0PVCLAq2FDDXRwlezIslUmVsV3QZ_S',cUPMDTk: "\/post\/416403772662?__cf_chl_tk=ZBnhGWzVqsruVGYjr6.EHwCERakxd25Z3mDCziwgxiM-1739239502-1.0.1.1-ZzwHsXbm2oLW3_.KD_IDdjnAvzkfOHuhAnv6HRLLoq8",cFPWv: 'g',cITimeS: '1739239502',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/post\/416403772662?__cf_chl_f_tk=ZBnhGWzVqsruVGYjr6.EHwCERakxd25Z3mDCziwgxiM-1739239502-1.0.1.1-ZzwHsXbm2oLW3_.KD_IDdjnAvzkfOHuhAnv6HRLLoq8",md: "GIroDuEqRPmGWZWf0NC.eDIUNAb_V3zFc9H6BXZlCBo-1739239502-1.2.1.1-173ppWHNFQNVS9PcANhJj8QErlGxbP3j9OU7.lRgVUIBwiNbs9JokvIcM7LrJBCNFXirkZjwVdW2AoPQkh_ZBxPJKCaFvbK4WIHWE.GHRga2NAnNfmaRtyuHQgEDEk0Zv8DWRHonO8BPHEFgyf3hLmkb7q9b4uZRNaa6ikJnM4lY0A8RQTX1ghN9ciTgRVEIMPnaJX_66tujQDvIuWEO3CAS7O1lqZDyeC5HOAB1UmsFWMuCoQ3sNGm6JzrmcccntAGUbYY30.KEVUA7yycjkrysgFcOtjNhzlr6XVONoMMqfXBNoVMzGfMZJG8ypHSxf9j1Kff_q8okimTMiN0EgrrC1kecJFIoZRsx7QrCW7rXwzsKFBoaOcOL.qgH1OWMDzwj6Ip8aGb177d5IZLrwHE1IbAoPV0EBiKSk9j22AAaKeCWlXKnW4iGsBk7DbqmjSCA.b5FfjcyGFgDzweW7JaQUlojgyLmErlE3JJXLlOwle93vJZdxYgGHNKRJFuNLoJzZ_FVbtQUJJOOmrUq2NWK8nlZ9LQSGu35ZQTn8jz1h6j1PppVh2L3ZVPva0Ah8k7emOoL1uSK_Hfn.hu1RUUSfWK2sH_JTglpos3vhwo3PD_kOTDFzpx0rw83iOqN0PqsOwGyFJyvl.5Ul4S7Fhj5Fq2_pxeRoi3h6QDSYAL2uYO10mIDStwRTeJItlFzIpOy9R8b5cJ2e0v23sGPI_4KrrT77qMkbQm08AxGCJmnsfWvqqF1yCC6xK3Q.UQEcIfvgg8r3feIhB3qWa49Fsk8t7RrXtKFxS9B_mafMPTadfmFMFrvdWidhJRhot1Hqe6wopkF25MEv_sq6ZVYr9.t0.JIRC9gIUedkLgJtLzIw6Y.aIdZz2qwbyx71TkQen4qx_8A9MC3OfcJ.7nfDVouIHlhBgZ.3XP4n8MXm6i683lmIkeGOHZeHc4Kt2ddUhCm6xB8e7_R0_o23d9MfBkzkI6OwvdkGvhgGiU6WbypHg0joaAJ883TIU23wkTuRNJLXoduDf_xGRh.4UyGteoGn1eWRqTsA7Pp_R9sC1aSWoqjzfgmxJb6oMmwsYzSyj0tCK3yc_jQm8qWa_e.NRURkn7d.c3ZGiTCuuz88cPDQ59wSSOGFLhGINUWFA775Xe5hAFmq_b3MWjh1WwFwR2tslgshhGkKV_6oaBP4lJFi.2i5mIYBgejwVl6Oi2LgtZeFf9NvwY5oJV_fwYx6H86RW_3mY.BC9n7NlK7ktpv92y8ZLeVmH5e4r4L.DoUjzdQg5vrRVborfgibYPQpPk2N7mQdnlh9qDynHlXCwy6X9o00otxpDOdPRfp5au3FHYomToR_QjfPtqtcD2_msxB6RD8FhVl73Ro61tgKq3VQ7fcgLH7triKcbQl86vgLg94bTVWJ3iAiyH3BJhD948aE9d85TclLV4AiWvv97QDxhA0VvxO6WNrP6aPASAMHkAezMlqIBSYOhEX_j__WmcLKUAe3ntN0fbhyaQK1cnXhn5g6muqmVEW1hucpRBLwVobq13C1RMGkjvJ4X5iBdVrvTbKTuRYZhUAlQI_6otFy03vyxoznuzOadJxBwMbOEZSklzuW8zUwpdu3vXNszq_tECDo4LWi4y5P6igkyTI_IgLzzaEMm3x7W2tuHEgv.YLcoS3PZl2IH4lXbek6L4nZK3_SikiLJGncVBEnkjKfOmZ9R.iO.CjbvI4TPl_HlH2xwjOHOCK8vEJsFy.KPyHaCvMgO.bBHj0ky2rqOldAhOym6djivTB5keEfk6ix9Oe._RpObXW4Tsvoz3xVvn2lehIiBjFQRSFvvVZgAsSWrnh9ErWMfknPOFGGDqkXCeAwVwICwMpI_IdsCPVzxY_ZmDoG2jN0cy4gqsd5up3uTYsw0NDnjBjbeVW5I6U1skHVS7CelS8N.F0tOvYOjSFNOafOKQfQcatntUdQ9UWPaUaxrnki.OwyFVT5.MsbDmX3LbjOzTy3dkod7ZQbcBTUZEpzo0dFLWSQ5dCPkLpD_6jlGGeBvRjMb7iTZgfXEKErbOvoSL60EPDmTX55wljF8UNlavHW.Kyh3lC8_oQqkpG9pPn7uEBw3ITV7FgZY_eIDYcNwzR4.PtYqxmIEA665Ppk1WDipTL0mw_y3g41KyNpm5VMnasJwRDccxvupfSPYvYqVjng9kIuUWDxAaen3IVY_KyZANW9XvEbBDh0P4am3BTZgydHW8wd9oTrA4KHvsMJrKdcTkWFRJPYw",mdrd: "_YdD6ED3Xpg7maDaiW4UznEfG_tdW4Ox3SmCezyoOQQ-1739239502-1.2.1.1-_7RXoefl3znBP01lB2jCY779GVxuLbd2GwRNmOoQOPYg6JvjuiL5O7SrAx9LYi1QmhwpOuBlnLV3ZKPfjvCf2881fzpAtHdtIryrbondtMsM6dHJBh6rk2dmQl74V.oF8wkM1.RoFtocaYXqX_mnP9OCsVm2.E_OVVT0mQwgdFhGi57.hoFrIehCOBpj4kdxnNud6H57ExT.OdSjc5hGLiP.HouXfZJxKLYTFrHm2gYeG_CWJYh6QWHkj9Rc6bh0b4eLFHuLzn4ljCgFfB._tHcOhA7ivQAa4DaviiLSicybz8ERvMXX3ZyIRsyPVyPaOgs31r8.CLoxcey5AaOa4jvzkcI9EWNERI2zK4zhH6xdfdj80fotSw5792cVHlhWqzLuqCgPy60_As.zEhsSF3Gk5q9GnMbVCSmL_MMHMM7CgCcp9Jr4Sti3bh.wSQjlnasmMkZQT_AJVrDIv40CjC40wifmWrsh62.2OJ_TesmSaKw4InWTC1F8rfesj7D2V6zj4QqMNGaXIDzSjyuKM7XQR4YtpyOHwCC6TVPZ3gO.e_22cgWARG_29BZx.cmvdXXPPMxscIivFy6Lde2ORZ66R35X9x0OWv2ALMMchjmEsiYvBsdwICQ5N6TxlzJ4YCGVBdUMBkvyC1tdnfV5ooUBiahQfWdOfeSrqHHONr1HWx2NpNhhzridtgj1SAJib5MIaKEa09GqIY59TBWa6ASRJBsuLxUrwSqKPbbEQJS00AcD5idSN5M_V0cB0txA0W_OsKyfF.MwiMUDd7lDnxsYbFhBaZYFxkbHSjzLju6KmIfJRy7E3GgldGWCE6jkkXiq9SWBvpfyYtj1D4Stu8SkEstdKHEU._8eB9ObBbnX2FSYeW91PeWFySS3zBJ3Q8wCY1moPpGsXUYXW.asgfCBQ7OyKit_pDHeOHIS9cFPDzMw8tcgYnCVftTAjJ46gEXNZxJDnp5QxMfZ1c_VdHw0nfNcbpwXrQMhXHilt3Hz7hGpbyk8nGs.F6rwIwQ8LXpGR52eFzQSEyCacbDsTIwCSzPNYdUEIwZeBp9FhLjwjJxb2MPtEyupBqxrfv5MIhXcUUtsX6mWPgqDa_qE8BN1.DG9QxTO3Z4zEXkK0uebRMJErMdviUb7bnVC_L2rrMEvmfHDq8ftXcZ4EK1rBAuwx1r6fqHNjeIvKQglQukVLrayxYbKkx4iAINoqbrtN9FsRuYQaH5HLJsDZ0iXvUokQf96qIfFb9zgc5fC7paNm7hCu6vFcbaELIoHwoEtgD4d3WmVBSdD3T8F7cXRfljbDhpgIDknC_Crpoy7S.qOelv56AHoCSyLYDr5UqYTi7IREowUgxyykolEVh91p7r3svgPxGNhoG57Zyd8v0KEk3NqFTHMFfeCpKks8aCxAp6ycpROls8Ajljg1ZkZVQZL.xNvTA8kOHPAnt2K2vKRFmK4qZijBMZDwQvU7HthitMcYZRSb_sbRgp.p3wLMIc2wF3mpTmL9jPMDoA.ROHujomZB9VLG5gEbOD83Y2p3BZuwMqur700VPQQz711QpOL7bgGKLyYx2oWCVHTsCzd1gkMIr0Xe3sHnQewjAiKGCCl9cRYXPnOoTGHqgCkIm68f_wEYNKtXjlh5RN1ndqm0hZ9ojd_j.Pkx7rQqO.6RcWGQju.OQwYeKC_Et_L.3FhOK9YKpuUuRMBz0wcO7ozVW4jFySr8Wza8zJS.abcf0D3ktQToGnoIAMIH69Vrq1B63BJSCyrdDw2Pc7XyZHbhETqa6kAfFJ33LgLId2p0O3l75i9COSZ.K1cTSml.4sJYFYymblhU7dbIgTt2hVMgKVHilUPoApw.4nc_aKK"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=9100c58c9cf4d654';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\/416403772662?__cf_chl_rt_tk=ZBnhGWzVqsruVGYjr6.EHwCERakxd25Z3mDCziwgxiM-1739239502-1.0.1.1-ZzwHsXbm2oLW3_.KD_IDdjnAvzkfOHuhAnv6HRLLoq8" + 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