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-8621749305-gov.caltech-edu.pp.ua/post/8621749305

  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-8621749305-gov.caltech-edu.pp.ua",cType: 'managed',cRay: '90ff2ced1bb9c57f',cH: 'MAASznZn7IEaqW__c8i02FoaC2cIr2ro4yTO_GLrSlg-1739222765-1.2.1.1-7NKdxmDFO7hdMkKadYC4mZltUpUhyaR6FXWhCZPTggkuNuUpS1UU1w78TQ9qz8NC',cUPMDTk: "\/post\/8621749305?__cf_chl_tk=6AuYPS.Nqpw2ppRJp066LK4XVYlLqHbr7bYtZxCoaRE-1739222765-1.0.1.1-VS0hksTmXyL0uMJzTPwQXXLfAKGOBBFWtbj5QMKVzrk",cFPWv: 'g',cITimeS: '1739222765',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/post\/8621749305?__cf_chl_f_tk=6AuYPS.Nqpw2ppRJp066LK4XVYlLqHbr7bYtZxCoaRE-1739222765-1.0.1.1-VS0hksTmXyL0uMJzTPwQXXLfAKGOBBFWtbj5QMKVzrk",md: "dulKSU5lwUTbCIUXIMujuakDExlXRe5Rbzi2lXMoW5I-1739222765-1.2.1.1-pRcHuqFgyT3TjFQhonkzJ1c0b45dqEokDNGJ2dLF2YAn4_voaFfPDeZFZ2.Jmg0dSfaVtVmj6nspyaqA22KYFaYLBb4_7B3049mvJpCV7e056fVijb3zkSWnmmKBvNUBMQmmyKIrWrRyOSXelfCZn.43RPhnXU3ov2IxGOh0DFNn5kE8X2em9TuF78FTWQPXnveZBIa9w9PNHf4Zcsx.t1gZoMNOokp7w7oeF8dyx1hqnFAl51XK9JJ8_28zOD2uRI8gmTR4snbYstHAbgn70e_ucMhC27NTfoZKZae2HYcN5m4MF3aNc0MIQySymwMRY0V8t9kHUDFBqYJPG.fKLiEIiaAMpwpTBfcd_Dm1FaWpszT7o5cZiDMwUJVv_j6bWd9nOoDtza3XgKLHoojqsRHi9KG0RioSiZi8lfYP6vUImNZnaZl94l_sgs_DaqAaFtbcQm55Ob1E1Dedu1k1kWeKt1k0izZBwLqWoNh.dzlrB4MJhvA2wnH5uWMxxqq8Enng2BAJE6bcbzS0KHLRshyYP5NXglHNT9BUu2hON6MojyKMVeGL2A96mJcVQnmU.UKLAdPhSr5yXAAfprxHqjMpEjRmODgEPQCRPtGFD067Xq2VikjLDGFiWWn9qlDjpDn5EUcUQgzxKN0VqcD1haCcBaE9DT9wikglyhxYtxrngbHpeUT9gOH.L_pR3qOrN6O8kYHTZxERob0URz6ibR.Y7LPHdE21hl1HMEREYiNwv_f91heq35e_.ocCQ1QZ8RhdRYO2tUsZLuxnQc.2Q6MWLsxw9y4VVIiuE5q9ZM0WMhneAeWsLcO95l1V1KDerzL1PIWCJIaHDrR_qu7tyeAEnvkyGFHd.0s79codlp9CRk46qoiDLo0Le3FTVFUqILQH7EtNslGxRLlhZw7l8JLkjnWfLxv57D_ECEQX2QURAa_Lqo0pjq.zRrANxFLvCurn5XrQo1nr.sk7klp1tclTRtv0aAWFQ8Zn7DB7.giJ5FDBckoAhEaVVTdjK87t.XeX4YO_bxB6LMlJ.4M8ODkErAR7jjVcn0zDaSeGq.H6kJKXLovDwarwkh1ozFGr_fEymc4Z3WQMqXR05wWAbbu2eQ_I78PWbCekv20ZfW5Y0MGSnskxmD1J8uFRoQeHW1LhDT5CJHK2j5xk8uFjN7VVkpwxJhqf39p3Sihv.txpzyQBv6v2yqXfrkovF6xL6.Yqa4GvxxBWIjqiu587CaPuu5zs7C8c3TQIZKUtkTO8Qy7OMi1X_oA3lAxC7RGWKzdmUMGD1lswDVbT149T5wBiPzU3VQJhHbhcur5M9DCZDdhyigyTeS2GcCqLz7SLymdbTK4ZPLsEN4K1JB20A8IySQHhMRTYovCpWqQylj96FpbRZRM1c.b_TYbliuYv7LQAgBqwaAQuEbgQW72ZHiROCVI1WikkTdFGmZETp2q27LbKWwhbbpJh4hgWYDiZUD_vTAdYA.nB_DZBH_8fUnqOmpN__Y.wd6DUFMFQpzfqScaa0KLHbn4jO1B73eTqCdSFeFb0rHOe7ZtLXBoie64.xZ99kp0jHlSuhHxPJc0MkfnkH3kZKi5Fv36GEc5vbHzzRV73r_9P.XOk76sj.ij1kwiEaubNZ_mz8K6UrHsF6UmZ.nXoE6jryqeKSMzb9EDar4OzFSQ2hfEA5SfMwGXhHn_YnQ7m1JcLGB56H0ooVOxvrkvmkgB5Qpe2ziq13FWg55qs6Zme.GRcq4cTcSOOKIYbR5ADF.vR1EwgEmch8jVz0Ux1Nj4hB5crGorsaeYp.drdoIDE8cLZHVvGsKpRwzBTHQGHcHcFUz6YgeG5nTC9iGRfn4taHSET6JJVzi_FtpDTiT5reU._p6AWFKUoFMi5dV1L9tGJDF74BTnT19Sc0thq.KZwwyvXf5owpNd_PtQ3Br4Cu3reDJyWxn6BCK_tDDgT6p2RXKjkdwXgm44uQgsijDiOorsdNLI0cpdjvm3SVTGJPKhHZZliRJtpB7N42BYYKOMAeX4h8sUtLlD_0zZwXpunZuI5s6iA7ravmnEH9MHu8zDWH8lsTLrtiQw2rFO3XeC.oR6ytG.qp_0RVlMiRnF5sTLm3t2kmFKOQ.B80IHkoLvcOdAkI7PWZUNl6UNDgO8DLwnu94FmVJJcnKObdxdQuKjsHdBjvf.78TN_5HOppPgY0ZEaYM7zsg98Vn0dhz7CdT7T4ULb2QxBxRi5DjYAjirEiwnGy1HdxLQlmzUm0NKXKEbVgQ",mdrd: "e0GKmCOBYwGUoCkmXOhz018SGOunc_6Y2lzQSIhFA4Y-1739222765-1.2.1.1-hYwgh0DdsGUdqDAjoGkEnYyU9V3yBoUNko9HEsEuNtgk4gdHONP5bD6yd.6fpph2GW5k_yM4tvDgAoL0QsIEZ8LeuGylibIlfubrO0FgtiVE75rdnHcDSALwo0HzRZb1N7Ubih1OlpMg2p4rdeLfnkW_MCU.J9Dw8p_lGvbUj_QtpjCUBKv2xa9MDICW2EKFcAe67zLLI4MzMBFHpv.xCHT0EwQoH0XraE..LLxpFbRnAmdIe4DBH2Fs63YDx7ertRoTSVRvDv8A_kO_fV2FIE_7Myau4vTAgCcvquA3Amae3AUCga4MOuXmY_rKV8p3bAYvG5xZ96XpuYaErWYIQGA3GeT.1EpaRmRBXzigUvC1iuDJG7v1mpIDA5lfD9_9SCLnR5GHwb7NSldb.YuPclsPPU35vhPxuZyz3kwnGop_UggStVsuYOLcSrt5DfJQ9nAUU3usHDgxs_67lFkfVvNd_Xrt80U6qiv9kzoCh7fvgdZgDdaqmkgJVc5m4sa_VTuYA9rmNo3xs9AHDgCsa3b14xusaVIXg6brSRzeDLhjYRo.O8aZ7JJ4ZvEpOYocNntGKfYvuMudfzSsvANeYuFP1u4FHHOkml_koV81Sp5E6uc6yV1qvBifgKI68IH0eqOOjYFUeRo.ngqVLmNLwAN2q8e.squOSjVYaGxke9vwL415EgUP_ADP7KfTCq.Z68hlrzRfgwD4ypjv9Pk3OhzwQfs0DKb8XX5v5w.Bolp3iEyRkeNdlO9E8PjZcBnvu3bTCakd1jEq0DSxZkLT_5EEs94Q1UoQfxHDcm.d9zE2G7wRzYFD4sD8w7WA7iXCOPUFx1whCEhpSHgNB5MzI2ck9u8Tc7IHK3QvhnzWk9DWqy6VyRJc_jBwRDYn.12bCEdXliBYrwyf5.LZv7iMoZDsxUIZWWKdhlE3U_Rek_cwQmKiByZUGUv9Q_0lCh9K_ea5obwjT8oFYCYp4H9sEWMW.5T7A_NZceTuO_BAM0g5WTyDON5Psmd1urVwYwSmy5Be6xHIs3Yl5dYwHHep.EOhXHEYQ6Fs9GoqUEvq4zQ4pWmNYr2lNprW.s2IxlWM_tvp7PSArsqr7C9xXvQ4zeYrmECEAxaPqVycVwu5EWQLZkGdSUQZ5BG0Dm9F2CFXF_BsJVeVmqIWW0AHISbni7x8ByaCr4r9jMasdAslhw0DXjP_OW7Ocro0iE8gSkRv.c6L.IDpa0xVHGdFyIdELqD_4d04mCxWJDgVqMStXWXQ1341n_Kg_YEJlHmZh.3rKk.T8_YVWFSFD0y.NEMgHIvL__DqYaoqzEFnL948TdGrEzUYGslPTl4vQga4sN4P4OaFbGH6QZmnVcWAzsB0prqyYMkhjzwbXTYiB8VDUd4GT_h3FM4UuHZ65JuzdzFl0p8Z9_nJjb64rWleTjuUh8cEgsw6L9NRphC7hpWIxfPDXVgELmEioc00jImup9FFeygxxbQnrV2mEGwkViTlFvCfeRbkZ1KdH2IRdnZ5tMttUpE.PjikjRIT6dTQHNIegDHWnfqQridFQdoJ_QU8GObOG9S2g513y9g5pDlqNQV.g175O7Cw5r28P2Z2r7GaCwUHtJg0AVcUqDhoo59ZNHm0.DlC1YTZ2CZ7C4cHgG4ZPftuOBpxwIzVY1fZmvotJTLgpd41pbgO3sTaOqnVtZ71mdJrcE_E5g1fztJiTkkZpEsS8NpJNhryZ2v4PrjeAqCEE0W2r7GO6ejWTrueDXFSQJx5vexZnfTxYgev057K0_NXQgH1M43cAzkx3px5uNWEif2wSmMJm8xM3z4upp86.RRpiJbnszWxJkav4S0"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=90ff2ced1bb9c57f';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\/8621749305?__cf_chl_rt_tk=6AuYPS.Nqpw2ppRJp066LK4XVYlLqHbr7bYtZxCoaRE-1739222765-1.0.1.1-VS0hksTmXyL0uMJzTPwQXXLfAKGOBBFWtbj5QMKVzrk" + 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