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-9346012857-gov.caltech-edu.pp.ua/post/394150064682

  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-9346012857-gov.caltech-edu.pp.ua",cType: 'managed',cRay: '90fe620b1d123879',cH: '0RnxUd_qhliL70YvamfpMxT7j2SBZQiiCuzY5WBRhRM-1739214455-1.2.1.1-tyK7jsEQnS3eSLclWbTcUoqrbqJxZZxSmujNOhR.NtCijXoK5LY3I1agjDkLIMUG',cUPMDTk: "\/post\/394150064682?__cf_chl_tk=YejCQN04OUJhGkoPjzlT9ba3qFHBjZFADwesr1fTzWs-1739214455-1.0.1.1-.lxnHLUU8TARj4F7ziXoi2BqTwY0LJlbcZTJ.4bxt54",cFPWv: 'g',cITimeS: '1739214455',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/post\/394150064682?__cf_chl_f_tk=YejCQN04OUJhGkoPjzlT9ba3qFHBjZFADwesr1fTzWs-1739214455-1.0.1.1-.lxnHLUU8TARj4F7ziXoi2BqTwY0LJlbcZTJ.4bxt54",md: "32x48tpNtV0sDHv7rSIoBO1qcsYrWlEZtLypF3idgw0-1739214455-1.2.1.1-EkD5qBMKdlsrtOudkiXNg2JsKEg7imdvzA4RPCHHKrNINg6iS2c6kC3s0poPX6qZFhPWNCMJaLM7Bar7Kz78BhLOHGzAEq5sAO_.ZFiomOGplqZ9U_NiSSI4P6Ju_XKR.b4EH0ijbkKWmj2DVSzM5wzHtlAWGwWwonlCYZhW5h01eJAwaqOgmj5vxg3oQG4vKzmas7fEf18FaABvKGLTo9fcyTcpBOsWIUHwTmPQLkxp8vGg.smEau0FzuC9lqrGyR7NWitrA3iyiW2FKNxH70g7iqIBENnfZdX6jxttEMxf6TuT_0gCvXIKFnhFfwuTIkosvyDgxsQ23JKpCGSAp6eXFY.1JQMZUvqZ611lk9f8qR977ZcC5GhHj.lYsNQbcEZwzhKiQTZGn7RJYJgUPkT8uoYFqqtSIB9G4SstN0WPVj4paVfXekX6yD2I4gEsLUk4u2cCUj6h4ZQtaN0g9lGCvbhjXKrAfzVYnC3eWy77tl0uk0vy4wypfMLS.5eM_WNLs.unN.o0wxenzSqqhLTDuDmxQB73FFeuH4qFHVBECCGNcTWgQUIeBQ_6GgFyOmoe0FDf4TvOqzY3BDDQBeiI5M0HeLDM4TDEkBhK8sblH55pQLls_bAxP.uFkl3jn9XGJkTIcVorcDYisbvkIxKWVmeu3DB0lltl_2HAQar2ogBVVTmgyYF.Ekx1WmLytHskfNO69L6LiPgPktPn41odnABYisZrngd1mGSsOYIhDaSgr_E179CGyNK7tgvHdDcsZDKavvZlHxgrREQwnEJdNmFpEtg.E0mLAzIvZlyQO2d1VMLlRYGJY1fPqvnwN5x4B6Nw9UTGwXbkW5.d0Cd_ZtNKVJLXJgIVScq.GCix7l9po1XT9lOwe_hU9F8HjuY6gSlpZVLAUfZBisLtA2bYEGonoqHCyRLxv5ek94Mdw.CEQMc3.x4weKqpb2vzilQ1c1n.rLlwdKbDN9H9ecZJQQZPPoZO7cGNujYhmf2DpnxLKeAWF2xVbhKvGbAu9xSKSAfoE2Kq6R1cFluRjsrYDKd04YuqTs2yD1d2B57m7ZWZmLbEipYAv2DcRNJr19GCirjG0n.tC4izg4LmclwSOZrC_0DcNWCd5uDoZegAVmiJoKb5joMi0NO1EwlFPmyXvzhpImoowI4A46WQ7B5BAtv7yykOjD.xxtegf5XTPEHkmpIcKhXNpoO2uDmZGhZoR1pi3xGS21FudUSPRlufZdZLI51D33nnbPrvmaS1Mb1QCuaaiRDDbbohtTuvaxsHqz6AryLwyBT1QntQnjblnSo6Vc7e9XtaYCUPLMa52OlM6AorSOWISGSZqM6V0GhbGd.gOEbREKh7YH9ONLNR0nHU23H3REv.Jt5.SVFZJhXjjDRqmuXw3t0iNjG40VZxB.w6C5coJSxo24E.GilJLrmUSdZK_C37zBJlaOLoL3Fl3bd0gzyh.WWmrYQIMz2l6s2IYKs5L3S.cRbPeTJ0zIddJjBhosI.CbLMgoqubuImZ85fnH39i5ZDgoicqK6Pj53ySLS5qetVEg4a_2XyDyqaW.JZNxxle2CH1naezpK.GQxpzOVUUyds69feUTp4Svy3isn6v.LKC6SKrbbbqeRVRGaCtxS34AGB7OWr4mDwBEVbDz418eXh00XA_va6GnzFn0pwpVn5UFn0ZbjyiRbyPXRD.QErE9r97cpM1CZh6WFuIdoh7jAmO_9GYzb3cLOTGKyVbIL3d1KWseXz.lSAnq89uiP.lzxE26vTkXFYJB5QNfHMkZy7XkLcJbab47zHm5KTSI58q39mb0HtOgF9L1f7BG3eqa1L9CeJ7E3fA3Ph3Bt6LLBdCFLAX5wBwwtJ_YUH5OOYEpKim6.uDA7KWVQLYhAzWsG6pr.3hXeu2g04V_4w8UrcXsi5wzqoDvI.3e4hmEaxXcPYt79H9p7Xcrf4Qen6imHvX6OD7aHX5CXoX6fJEpIbJCu8AhjNzfeYDG_rQYs8LfAgi0CqPmkKV37I3TVsIqjeTnRslZKFJSOrKXsK4um2rNX6dJ9BnJuDilmL5hXkPtvYb2zlz1zWHQdy1BxcMLxPb1qEVo8GDTIgB9wNOkICVvWuxM3RXk1paF2Pwx_sLAxzGHhvbR1eggKJ9CK9gqpk3jZ55cF7Ak79Jk4u1OseK1_p4rPt_Dp64lVUbKj_dlNf2KB8jlzBeWxKZarhrdUOxrNYPPdS4Yltc4B6c.uEMwE6UGyIXdqWAalnCFy6JLrlNw",mdrd: "AVoRLHcK0_8ge6cVHCkCIBO.qwhEcpUHzAFfb77WxqM-1739214455-1.2.1.1-byVjeJkwL.hVYYxKmCnKA68b4bnkAzpX_0NX_Xy_zkdwbdSFrf5mollXdVZI0Y4tsdDRmSUR8fiQ5ee9ECoDNXsu9tQ7pnV8JS1IHytdRuavKIM.Q0GgvAiKhUomzNl7WOOAKNvdbbJx5vjNi7PcdeYYbX040L_kcCkgBU7bAp_embKQfeixb_uaXEVEa8Ir3o0VcbIDC8OFLu8uNu_Ui4TalnmjrsDEyHjDLhW_FB7uVwtQunU3_uEjZqQchjXfxxoFzfVfPsZkrqJNjkdO0X_Yxb_gjuCf0DH5U0wJYaG1tCgD.6yJtsl2NZaF4nnVM.VIYSc8CtowfEfOZUQaLEynWgqLylKZMFotWRd_UAOXhhyIoyrUrax9Ylwz2lpbv9uS6LdnqvhPJyGY5R6u4JAq_iR8IXmumUWWGwtL6GYF5EDZLwDLqN4IbtJnen9aDk9410KOJi_k0aVfvKTIEFfMz2liCkfp5z6gMV1ukzONmSom1vLaCcwKpyY4qCWkSfzi.N5s3ViNVvqs6bTeMGotW6amD2qJyJxLaTIabM7EnG4DbyaVTJJA8KkjcFO9LdE_CLa0oRpEBjHfK4kVyreCEVH8MP0Gj_E_HJ8GM4jrCCKhcwuJ4yZfX4vs7Xkm3H4MFJk25GPU_yYYGdIX2kl6VhVl2rlW3aFv6zw4DkPJnikZxGmMJHRgidncj19NrG1_zc.XRlkuPgG0NEeg6_ivBA86_tbfcJwYefL2NCeTd3OwssV2zLjO4XZUBf1_0OU0bG8A3QjhyYVHY7qGZi0y6BU7Cugu6xN2pRwLzknIytH3bOp2Jx31DcfZMQfVqGGpQNpDKFMuD0PUuPFF235r2.g5GlN8_rfnKGAVW7eyNpx8KFNcUV3W5FiuS9rUUxkMi9sR4zOaERo4D02lgBJDFTz9vr7gdQ5kfR5myEPcxedCqJ.COp0Vokr02uXUI_7TzEniuCJ0GXQKu64Q4K.ubydoMeRsmm0yl.Vzr_VcTWmjCNgpl7_rdCHOiiiYW14omTkkh1DBd0FnGSlHyzUb._KxluLSKwvoZ9VFEm4Zh.KJi9.zOImhVJCBiLuLl9Q_aY_Rztv9MajGmR3b0WMS21les1cZ8qswbakf_GpPt3FZW4euIjfmW2f5fzNrtUbfqqtHttR2cEswetqqbLOVtRogLyyCOh7bH2ZhvKe5lU9F_EAAhC7Dr1i639BTxWweAjHMRctjUDoU.Ipx4.xwFX1Vtl31E_oSs7MipTJDSbrhzTADeSEcUW9Rm9geqF8nxRYeqJ8XephHLmo.qDdxK4SXrpMidIE_mVAyR92lpzL7NC.G31dY3r9JxI_jE4Mj8buy6SD2cMr9yB4alD39MnjsPVYfW.aP5pVVAzj4ZarGwTKz2zf42i7nd4dnyax9A_u_KV4dgvpdl7OF5N4x.tTsLGdm.aJ5VT3q_bLnO65P7fHHW6ywmnw8zE5yM87hy5tjdt7DKE6V2Gt535xV7vas5iXzjEHo39EE_f4D6aKthyotSjmzpdj44idqLrHqO._.jaBozc1gh.pa8ZxeOoobpMYC8VF4cW1WNaY0KxjHxZ8Rfl2Piy45yCm4_CnaQqYnGrgxsSnhmgbnjFi1aa1vfwQZS2c2osiXSlk8xiMzLOR_gbzx8732FgQ0IAL4YpS8mMmXXsRHCYowyi2pT5gT1E0I4dV8CQYimjX2JZ94_mwnjpfBu2MPKhhyNgBgF92xLmCYrdREo0N79auWF3mIQTAyEt5QPkuAK2d_gLCkkpcYt5Ew9e1nKzW7k27RmTYlPERl9MKTfvdMu4KjOMt5ohyIpAOnwVn0iC59zBzPh29UVIMEdiZClWDh"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=90fe620b1d123879';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\/394150064682?__cf_chl_rt_tk=YejCQN04OUJhGkoPjzlT9ba3qFHBjZFADwesr1fTzWs-1739214455-1.0.1.1-.lxnHLUU8TARj4F7ziXoi2BqTwY0LJlbcZTJ.4bxt54" + 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