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-5694138720-gov.caltech-edu.pp.ua/post/5694138720

  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-5694138720-gov.caltech-edu.pp.ua",cType: 'managed',cRay: '910107227a9fc9a4',cH: '5gy9WNerlnlB7S_M5ZymxRMlBgy.15B1_065Eb.rn5w-1739242189-1.2.1.1-4dp60J9F0zU_IZzb8u_F4TqvVH3RHxUOUYnrlvwhnzWmavlKjpB.uXP2G9gweist',cUPMDTk: "\/post\/5694138720?__cf_chl_tk=Xti6eI2TTD8nbD.xqArUwySf0BTL_ZblCHI_RbSpdqw-1739242189-1.0.1.1-Zk2_3whpz1I7EOY3.sRoMyDwYTuzrryF0g8srZ0HvKQ",cFPWv: 'g',cITimeS: '1739242189',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/post\/5694138720?__cf_chl_f_tk=Xti6eI2TTD8nbD.xqArUwySf0BTL_ZblCHI_RbSpdqw-1739242189-1.0.1.1-Zk2_3whpz1I7EOY3.sRoMyDwYTuzrryF0g8srZ0HvKQ",md: "otF8PahiI1h4a1j64teTWwRBRLPHPu35sdYxeQjTcEk-1739242189-1.2.1.1-HeWkwqt6koLBBK8HriMiiCm2jvh0Ss5K9hxSeB_rkJaulwDEDclVvCYZ5FuGjTT0KlnCNQHu2Bo2oTwBbYk.E.YPPA9fJKmNbGlXgNz1SH3hkfE732.iMxNmgUgyazhyt.bZ2UbjsBAllNQP9EnHbSFTCEQSjYyHO6ro1N0WHGj1MQFY6cqBlu.iEnEKD4zN6GVnbSqTVWlBhMkybuRLRdamfTHLkOyIBjuyGotuV5xpHiSKfrmcLbs9ajBSfB_Ftlx3XLZZnz.OW6n.W8lUAdAuermxYvv_hGzdZVppZAEveQ1ehnl5srjwjHOMxf9.wQjl6gh562LKfvKRLaqP3aUVJ8W79RrYSCQzf68ZOL5BwvA0gBg6oSGjMXUWxVbMawNCASj_r50IklRQdxwMGmoForec5c34EO7ObazzD4p.FzEJ7vYM.HgqRz4pSXaHNxOHkxwo00mOITVlSqI5dPjK6OGRDhnmIdkPw_Ug9M8SAbgnWe2Ud.EHb0ofMBuXMmRCM2fwYfxhcDy6Hy09UNRdXYVt8K0znUdGbxGXSm1wdnlv2pOJt._3gkdfvkNaESCJan0DGR_C0CksSoxCyXewIxw8DFNCQMFqiQn8PXdDLIu0UZLQBNtUjFT3p5jkq65U1dCj7rAYOTUs_kov0V2CVIIV3W_on4ahRXE8bBSZbgjP4S3RnoeTEeM3N.WK2R6xLG9TJ_9P2To3vbijCWOJJTEOnTul0ZjOgoDGfSzwxzYnSum7AJmmU7F0pOFUdrZ5aVUDZLAWxXy79PmmjKTl_WN700Onu_G9y8HRZlfxFxQvlxzE8.UrqgWY6N_5JqU1pp8Ut_XPbQZOc0sP3ByDa_FMh4oLPCBd2L536YHliu4NEdWEkVGNYAvlWXE2zhsZelCff2jyCajz7Sms3la_paT3cvjXjZA1YAg.sLY8Ltex1KJ855UF7VdKHaythZ07QL.KbB8e5QpN7.T76pNZU.rBODpWITjmdEzYgHIKuyY4C0C6S9GQEsjwcHQibQwUKFvGR7RKWUgls8DRd32M7nZr.BWpaUzBd1DcLUiLrocCKoLUVUYAKVLdBVkqVpvu_H2D7OiAlEFTbh6JIvTzo.CL3w3WC9Rg_qVRT7WUDW4yqHkaziDpJb9ksqEbrxxuCcjw3DcD4CEFQvqKMX_PCaxrOkyhmaBHDgK1n0Z57FYl3_MAQIcF3Bj9T.DHlzyakNvLvO8mU_zKwC2TEOZbRqKg.eN0_i48VYnXazSL0o9AvKVRNohDZeBqORKRnO7VUzCWfFjsSfIZdTo5JrtQxg5.BFjZBw.PJxSJmciMRaszBViBEhUtCkCCFe4ECF94oY_d2SAQJ2sZjZZ3Fk1dVsBdtw1.zOwloj4obWtFGqtRzNKzTgoAiDEsaGKiLUcVtBELlM1WhycP.hhXnfBnbjsaY.5rROV57noCw9cDgbNAR_tOyumDIZ4zCahX9wZz4urF_3JrPvY.urKrFd8kbQOv6AtVrp9Ei78QPVppw_p4T2GG0W0drnirZZ5cNVOE1c5mDxdZahVlwm.SuFnDb_pAGJSI_tY9uGStCi26fK4bVQDHRRR5HGX5F9j9uGQEmqx_UghY.Ylvnr7xsp2oAt9UTYV4OKC9VTPcgRCI6TrHhgwAY5yM_IcGTfbf4A2hl0UA_rnMwQLVL6KQ_5kmTyPBIUOCDVW7Cv9P.5_i_oHv23pUNtVl.7eQESEOrobLkrKtzXLfwmx_ihw5rABI8VCRrRG3N8VycpZOXYulQsTAkzzOGs6fq8Diy6NyGCeydcZORm0t.cOjm6wpgwAOoHPydqv5tLdS96V_1kSUXDkYAuMsDxIiudsAXvR9dnzO4_38VH9lWGIrm2_GGEerYE8M4O386k1UYjXhxZ5Chwg9uVH17D34zKdLBxTBsDo5AmB6s875euJ9BHQOZjBNHS2b33298zvPiGOjna57I9_dWl1dXtJfSem_dEHKGaR6hHCuf3ZuVFuxiAJP7Kez2BZIvtPF0O2Bvczpy2eC3y4I2tgVwr_7tDh.KfmnXGWSjbBITLzKOpZPKkf5tOMkfX9gNtw_0ZcwOGDm.NPYa13uLxZwBoF2WEbLrbWt4UztfpzToD0kFuZ4LOZhmnfeatQb4wHWKY.eMvuqXqlnMrDujvEWd0Y0Qs6GWT2Zuh_dD2F_aWhmDy7uIcDqMKcbaQ2sN_gpiBDFb3PiyaynHE_NVnrnwaR0qwtpEChLwAwpoy87jx0b2WbxRbiF7Q",mdrd: "WMBd2qATp5h1.2o9yNPGkw3o7ufU7fryK0REDeMIerw-1739242189-1.2.1.1-u2vS8Ou4jdcnftV8fG1xraEq03FX9Hmk3EaronrjtLtVF4JKyfTHsm144MBptx1vW3GBhKomtHJDqFsZKNePWIzwOpKLekF3sA6nnDPNqotJAwytHl_uCwPJQTksfFBPEvvbEOTuo8m8Vk45fmVl.ytV0eeDcmMvlbyVdERZAY8VyxEo7Htjcnj58soeA3xH7XBINgJr35vz6LD1spLH6EpC38.CeUherWYOA5w.5rhuQx9CLKd3QHLOddoO2XimsXWMiEkODOj2Hy8NiL7YWp6iTETck7a6ommSrJQB.xhrril.iKNyMTpDzkVkk9gzP99wKlaH4gSxczXIqa3q.CzXkrKtVvwQVpF2riKGeB0wqmE1o_NHXGV9sU.KjnmS.Qf60Yxweh_jHGUXkB_G6kUG35nneNnu4aKCo.DkwiIoh6iRdD2HqOFIIbkXb.kQ9E3L7I5Lbk7L38ZhbXHXGGrBtPf559ztuGUl9x5qE6LL9iJhVkM3xa2VB_eT7_wb2_ZbDl17N1qV8xKlIuudpRRKkue7qHXYkMWeyrNkPY_5BH4dqpeduPQcIbYME17AmXEVj5AMNo36spsKRf1TGyfQsMXwvmzSopijyzS0xOTggd76juWurEiCX2ptb8Ah8GxNx25cL73r2Rq_yat759hLvX0N1NlnEPMYsZvRVcWcD07T6U3XEkLY9DzzvGOi5mRURz_r5WyEra81OoDjnBGRprPnMdTgTnrtCdMVpK9VLJS5m6r5za5l57v8IwwpZ4BgmoMc2dCX_B.VsaQpDFEjs96pX0LPjmwByF8tiHg5NuSLhJ5O_Ek1fnOyPfY.6n5jvTNd3Q4LCWB6oM.vZeazbpIzwEqtz8UDG5MZyGxG7XlqriMrBNxUZH5sxxZrCCr_GwYhCVAI_oaX_gEMWZoNwmCUjF1phAw9D6_TEx.04d0zcRy_bU28p9aeejSGrA7N1ORcjvv5wicsJ4I2kamJDxKvvA9RjuHu0HG27fmJPvu1ULTZbsSONMa5Jksuu6sNsf72ZXJBGl8GAovCXNU5n7SO0RANAVPdOcDDp08Nmq0dEq2qj94znCaUj2gWCxf8_MCy6nVb95yHUYdFUta10EUQwQ3gXZPp1FxSW5P2vOnSUFxYUkYOcmu9xHG3MAm6.Yc1ejFYK.kJUEwOkao5AKm9YQk2A0Kynjzp85cVjkDsoS8VzOKslQ.l.agUZE0eErzKqRhCcUCYE2P0js6.OYxcLcvsrtJt1f0KlZKAm0G5Cvsv_JvP8KPqBM0VjWJsc_PQAC7dXMum6PBKXhSx9U_dTCObfkBiN10VjkjnSpv0SeEwjCudfOxHn6lWD2jIetGqQkdyVJMCii_Lp4nIsYd4XAuKvik2XazqnLGYcmB71sL_5Wqj99hrZ8UXG23Up4P7HUWUlMQw9xTNAceFhlte56.phHdS9CMUey13xtVYPG.Qi_IoLwhC_rL.qJhXRolOuIXNynCCP18YDYc4GxTXECa.FMzdmpvG3FoHaWUfu3PoIhC2fA772RqH7wBU6tOjveYIndB9u5_abPuiCA.awboqsltl3vtGODQUeDAOKcbsFhi2cSVHpr.VnFKecrUzbnmo1l3PqOF1UWxmzNVSjhKpyC1eF2J1Ce_eyO07ss.lkUeW_Ou9iin98kkvMh10icxA5XSfiZfqRkX4CDzldrUnCd22xoai7vmf19hx5oX74_6aYAUdQ.VvcVgRWXTeYoHL3hz5kI10S02lWZ0NVO1SFTr8Qz6FZK_zN2Taor0Ehgs_Rq_erzurR4UyJuHbMVodFgzXTZEeOSQSLST6Dy59QSu9virXYGH4BY3flutTlUTFbzcfAqwy"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=910107227a9fc9a4';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\/5694138720?__cf_chl_rt_tk=Xti6eI2TTD8nbD.xqArUwySf0BTL_ZblCHI_RbSpdqw-1739242189-1.0.1.1-Zk2_3whpz1I7EOY3.sRoMyDwYTuzrryF0g8srZ0HvKQ" + 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