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-4365128790-gov.caltech-edu.pp.ua/post/961259182014

  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,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHdpZHRoPSIzMiIgaGVpZ2h0PSIzMiIgZmlsbD0ibm9uZSI+PHBhdGggZmlsbD0iI0IyMEYwMyIgZD0iTTE2IDNhMTMgMTMgMCAxIDAgMTMgMTNBMTMuMDE1IDEzLjAxNSAwIDAgMCAxNiAzbTAgMjRhMTEgMTEgMCAxIDEgMTEtMTEgMTEuMDEgMTEuMDEgMCAwIDEtMTEgMTEiLz48cGF0aCBmaWxsPSIjQjIwRjAzIiBkPSJNMTcuMDM4IDE4LjYxNUgxNC44N0wxNC41NjMgOS41aDIuNzgzem0tMS4wODQgMS40MjdxLjY2IDAgMS4wNTcuMzg4LjQwNy4zODkuNDA3Ljk5NCAwIC41OTYtLjQwNy45ODQtLjM5Ny4zOS0xLjA1Ny4zODktLjY1IDAtMS4wNTYtLjM4OS0uMzk4LS4zODktLjM5OC0uOTg0IDAtLjU5Ny4zOTgtLjk4NS40MDYtLjM5NyAxLjA1Ni0uMzk3Ii8+PC9zdmc+);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-4365128790-gov.caltech-edu.pp.ua",cType: 'managed',cRay: '90fe717a9e5fe601',cH: 'SRYMAmP4WQnPKDQMUJrmnQLgLuwxz761gz9iEqwz0jg-1739215087-1.2.1.1-DX6qngJFbLH2M5QgMO2oNJwZP_l2BiQT6HAWZgr3V4jbcj3bBwiScVGj5NO0wNeK',cUPMDTk: "\/post\/961259182014?__cf_chl_tk=a2Psm6u8BwE8BOiUTWmD0dkjf0.xysulnIwUAc5srLw-1739215087-1.0.1.1-J5ByJ0hIib0S.6OGf14LLe8lsNLfT_nujBMZdlODo08",cFPWv: 'g',cITimeS: '1739215087',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/post\/961259182014?__cf_chl_f_tk=a2Psm6u8BwE8BOiUTWmD0dkjf0.xysulnIwUAc5srLw-1739215087-1.0.1.1-J5ByJ0hIib0S.6OGf14LLe8lsNLfT_nujBMZdlODo08",md: "70q7iFmhiWw2kNh9A1h_6nfZqjgBhbYuolx..B5.Q9g-1739215087-1.2.1.1-6WYMCWQLOTx0WHloEFIP71M6c.QQZ4wZd5Ld1Znjq0exL_4XVwkTuxCytbTIlHQum.E8_sraFwMIADiJJ.cQOZdQN9S3IRtJDgIQ_BuniyjmICZJXkMKjAX9z.ssQGWBej6WJA9pDSwLov3NB9H5alaX8UfQqXhFAbAaNDiY_hrmkGbaflkZH11BIdKtRwNX1HNL9kjN4vkygj9MaBmsxAsOXBuxY_6SjmBJR3TiHCC5rGiMgojjj6kRwHpF2qWycru24syZNPNNKNTn3O0LgVaDsnNbYkPcSW1IxJ9CZrdBHRaWBYsqjGXtyDbmLuSAKBz2qSvifYsOejkBXDpyyZfbiVW_XB66jt7IkjkWtcVc7fS22md8MfxxfDG8nEpDeXR24AL0Db5JVHGg7i8l8eySjqLG2L8U0lSbV2lbVtn._X5Zo8onzzC5l8mlIt1vqJtZAhaamXCbA5hXDiE.SfOP9IpU5D6qEP1Qdiy.eJi2XAMWSEA6yYH0pTLRFa87DhG508qLTWCGSGGSzkpI_AiCWg.PCKzipu..py4RyP7Vg3VbwT_LczV3PikVaMX4_NOB8owXQZLcAMSfBQ6v1qEHyb48UTAbp_csBR7dHAjFEy4F0rrmrTNobUt2gjo5PiQEfudfxN_cEzo2Ft5byvJIeBDRdE2lP7Khoh_p0p3_oE6e46OOS.Je7apB.YGtBupUdltW5AiNoPXe..E7O17DTvR9MM3IlXcv5K15n4IYPLCSpWiuDvrbxhONuSzacl_zcoFvfHq6Ti8xOQC8LkZOpY4DyaEZao.Renhgo6eH7eEIJN08G6bMgd3mjvPIC0NG.YlyZ2.aZdvjA3yVUQbdihlUFswo2mv9PmLmFlVmnDzxj7BG6GeB35kQK3NMl8VjIvHUQwduUTXW2p82kjPVhpGl6y8ObsE8nf7Lnq8LWDB31V6v8V4fLyr3m8ECi4BcAQr6LJH.1q9KJwr7pGaMh5kaT5dH9zPNT5JxUXTHArPO2p0GKPp4YPiGcsIm2V5FXn8UOd7DJXArKUk8lTSo4v6fXXoNAsrROLaXczAmq.dDgGmNvKmqyKUiX.LOZZELuA567HgP0P8TYP3aCoapTR34Yw6p4o2bh5lFlEAMB4RV_n8XOtS7cb389ccIB4EoFLscRgE.KYeiMZ4q1PES7wss3al5OCxz6VMy3hKRIAXvQ3b2LRO4TU5XTKGaRZU4uVCdoK_6V_lxe.2RYR7az0fpzHNYuTYl5YuB9Zjpb25xhhZArVpzqqXfTizI.sPDDy.POJWvsQmDQQ07HwhF2WnRwowaS8BkNYnXbr81sLyNqJbBkcB.Ut1822X5W.goRQKbJZ5hCfboUUJSCK0K.SvuoOvq9qIxizXXDRWNNPFeUpfp6cJwt6tIKBCl0KZiKnSRQXldj1cDdI98AShcYix6xsa7kdIkn1rO3A3tRjqa4jPYqSMiDTzCG2LT3D0ErWz9QzFN4.hpkxZTgfOk0zsa38tIpTEIrVpc7tFqI6mNh.NNInuoQAiCGGuRCQ3lHCcK2N.VlahcOZRTBZMMPmsfTQAFlQluRfhMUtKVDr7xtUdukPLIDMPj_0Wd.M9C16xOfYoS0tbpVaowdvIfR4Ar.Xuza80Fe00UNIIPUgeP.Ayzkmq8xkOF0nb4JuuAIwC8SAi_Fp6huY3xcjUyf67MQJ3V5L29iqO6bhHcYvzdKScsYAt.s.HOWRFBIBL03PjQZDKgr8bzZ92sMetayWxWOhv0aNkWHEobaJEw_eBki9NEuifKxlzxKQnk.4d_WwPpNyvpPVBi5WrMd7GXoNR3Hx_c1D0aVmAfuIQN.3hpiqDvU4990IN9HCIlKP..jt_1wDqx39jcwDi9Mlc.1APd2v7wKojR9l6ubGe0U8n8N8zWt2naygp6TjEjoflWwAOj9Ki2bkTnpojQj_bpePy_hF1vmUGdBBoj.dKC.jMepCOWUu5x3j3rseHPQBTVSOGlDcxWNo7laQRUEQPzMwx9YwjAdakZ2RfZASKwMpzQ74HUpxE3LhoPO_X5lFq4GRs32negOdLMNlX2tIVfeqcdaBcTuPD3VdQ2JsnyszHj4h_E3U4LPUZ2t4g_wxQtOKPDYczNwChRhO8qV67Oqzhu2CUhCi6GTGY9kxYZPvvLDudsDd_y9tHsxnZ2S8Q1r.1JjDwtOkK3Y60.3z367DTek3gso2nEr9HXNlC7qnMOJqsKmU4Jp9u_BM3BZwaiw2fwfushcbRxTOrAdA",mdrd: "0GU8msdUDXXRS395WVztfckLJiK0q_H1ChDTvmGMUlo-1739215087-1.2.1.1-Ej.rdUn1iwGlP6mrhZgBhCW0MEONpT6VyaBrl4gFrISd5sFo5WkLu4qW6kriGIW7575gs5aeSVzc81yLV22gdxx6rSyO._BPuck44yCTd5bs2a0nove1EG5jE5hAkZfDxcqiG0TE2_M7RmtHCClSHQ63Y77jhcDMcHEVtmZDgE6eDchXTrhWhfL2x9eryM9MbDS40eFIGzoicoKutgqlt6d_Kuw_xELVeh3AGj.7eR1zt3kEVnKNnX8XoCfA9xeMq8nr7vdRC7jkky4QLuswwpgMUHOJ.sXTwbyk6ZOiNO6cv0qnbt8HqZZeAo8reX9KTfDPOstzd9JImi5Zpa7puwAule5i0kISr3Nu1jgcwxh1lpT0tHIbz35UXl0BrPCNJe1Olvz__zxsJnY7.m_QOnYoDyxkotK2XoVgp1wP53Rhz0bpkSboj8EDWbb.LnA3xxtCKPWi4u6h4GozQTBqKZLtmB5oSW0UgQk6O8y7.xtDKTyvBDsO_sWN6cPmUNArf_yHaAGyeRbprZf3i9pBXdM3vbimgYGYvoUPPjCjLQPtDUozDZBpZoqGGeMY47PKPaDcJD6MMPxo4Y2RCpj2V9nMMyTs_04fGmIJ7zPqpiYXSSzmtvoCAMK1NRP7rhbL3ltN_SknGLB1szDLwQ.rVsDHP2FHj5_P1JaDn71c9ux9SjKL742U0LzaPQYNUpkUu.xIFDrj1.O2lWR5o.HBbUW0fhFFVQpVEhHH0t8K.kWwTv_SwVzIohPjYuZQSovyv.f9kliZF7t55qxIDrt1HOm02.HhJZzRWAkjPPuJ_GYRiOa3kl.x1cNw.etDrsP2OL3Tt9al3JLIn9hme1hnbL0FENhxydfYBGhdKRxa4zbsvG89EOVXddh68lQwBQQ2bvsVVxDvAZ11Enp6WoXDYQ1_BHFdwRq31QMt3XrZCTBSKe.0mZwHU6qkBvJ.ws6Wf3WHgIfdjH.yQtx1NWS8gORh.kaM0AETXZOxmGvGWQeBJiB1frowQMgqBKUtruTO55FDngmMdQnk053QFt7iddFSLZ0pjEze5UxKk2FL9tsh6qvs3UL32HnTLNn7i70oNR7j4kDSh1h5hdTBjK2oOhcgNXE2qjuUx8WLwc_d4vRvZbKTDnOYx5XuMHpAMFlakiQYas5m_PDpcFDdBrF_zfRvubHzfxS0n0mje1hPqJMXpcatHc2hjHtSbD67swxSumY8Dzz_0uAsfAY70Z4M541OM.mUooPbx8sEdp7Ig.6xaTSewt.RsIZaU1peYfD5RlTQc.5n4J1PmXjKPJITzkkz7wmuLiE5oTpUbeAEmM9UG4g89OGcozryHIYr6Nx5qkDNAONN9RAyka2a1dCiD648IYR7AIj8zohe5Jm3NQMiVs3U.i8arHdVh5rkNTrcpl8GtJr5hzD5EL6mGNcng4xIGifNqkJs8MeOjI1ESMfymPkCWhnKZqUENkwO90oDed5hAhCuO_baWa5ApYtpZ55yflY1NYqnnoLkKnTH.LLbbeM84MFZHOpbF9k0Fq2z_A4RNUQELSfjJj_YAO2G4owihU63yz793jZqgcQwbOMfGcx47Gy0oEl4FZyBLzXIRIFkEu3TMlvEVcXd7LWVtXjmEN0K0QGrjLo6SUCUAey9ixcD0P94OW0aEf5_Z36JqeWPb8J5Z4cl7SkhCNECSnZHF4vyV._dtpieJ6l7yspsV6UmHQwFkGNGpyTjF36qTqN9GRr4vrcSYEEMx8fxtgvTNTlMU428VJhbgTSHtuFGvcwqkwtWX82a7IjVrfJNdpolVqstuAwtPwXN4qfeUHoYlz0U9mWhywyN4gLqxuBXHqS_3NuXa5DtteUJpC.wY_VBqN97ThWt2mEujYr4LA"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=90fe717a9e5fe601';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\/961259182014?__cf_chl_rt_tk=a2Psm6u8BwE8BOiUTWmD0dkjf0.xysulnIwUAc5srLw-1739215087-1.0.1.1-J5ByJ0hIib0S.6OGf14LLe8lsNLfT_nujBMZdlODo08" + 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