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-4502179386-gov.caltech-edu.pp.ua/post/4502179386

  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-4502179386-gov.caltech-edu.pp.ua",cType: 'managed',cRay: '90fe84527cfd22e5',cH: 'WS.6E39Yw1RLcayUJSIj4dOIql4hpdrniNHdQfD3N9c-1739215859-1.2.1.1-pyjnYxXS5PoBQfUn9hjqHWlDqMBGeUbrFiQozbMZC78jMVpQCqOO1QluMbW_A9jc',cUPMDTk: "\/post\/4502179386?__cf_chl_tk=DhTifu1DM7UP3ShG815vQDJGGoI6Bamm00njEJUelFI-1739215859-1.0.1.1-DYwY0U2iUBgei4hUpeeupEmWzhNP3RtlLfBsj.CE5Uc",cFPWv: 'g',cITimeS: '1739215859',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/post\/4502179386?__cf_chl_f_tk=DhTifu1DM7UP3ShG815vQDJGGoI6Bamm00njEJUelFI-1739215859-1.0.1.1-DYwY0U2iUBgei4hUpeeupEmWzhNP3RtlLfBsj.CE5Uc",md: "00bm_CjL.qNkRNHglaEKTX526fgu7LGMCtelW99YV5Q-1739215859-1.2.1.1-rCBx89HDOcMKA9Mg7QMikI7_Cog9yFypeJFkn3uqEQHmJcUDt.X2IBYYaE39zdYSZcFKy9ga6XIn1UfqPBeliDviZIKVf0CUnR_0PZOtTpnFWzL5qlJqje06MS.ier_kl0V4t7pjNY20o8THmD48mr05_TWP7QKXDWp754K4xDx_6RWABRk4UxblrmqHWcey8cyvSrePwSvcu37roklc8pMg_Y8vj5QsoMfpC9Z7L3zoh8jdSxr9Lb41SvKtsMH6kPPP9Dq_d.w_Sm06C3T08R1BdJeuWlgoMI5RZ7sKZHBGRr3TpjhD6gJS2o2_bcYYxpOn408hsJUh6ZD6RP34Ss8ST3bs81aEgjnaLOTCTd9VF1zvoFcVfJTFI9dSUyDKNsScGUdbMkw5UwLU2uOAVzj3OBw61To9T1cDCUgnj_uZ8r5G6WFnGnzgbRwcPQIckvMLd7EYd_8yNce7shTp39jdNQ2s0.SCsyKV1h0.L0TowI5ANV8NLELYBozR8Z9wO4ll6uKm.uWzJ2IsbhIVZn0otsRyUZUJMaSEYbeggElMaUXKjiplYYqh.UCKc7nRe_eN2BPPL_n26KX9IDNjJm.je0oVooXnuK.eUCQgTXkzRIIzgiLpEw7ZnHsUCLj29b4Abd73HbvK3ShtEZpBfe1giZ8.4265HnA2X6cRWXe94RHtAIzjHwtJwLtf3JMAomtomxwvjUC7sVmc7ch.ReA0IC9MfCLjFG3wNpAfAAb937mHlqrQp2e3hA7J5rEyQIqwbRSAO3K5TlYIyTyeDNIzjAj_z.2yyG8oEFPjS7Pln0lEGE.MWX0NmNQyFKDnCeC46ZhT.9xuoi3ryprTFS79Rsetcjs5Pc5oJD6WtxA_kiphZLbZ_ukvLAbEIwBGpuFZkLIs3OecqHfnujrcP6Yilbv2SoSlmuubEHWolrnJebXFL9NtN6PHb5aKWyS63NQPCRYE51u6gzTmq2Ng0Z_uvtXq.1ne5VVS2o2YN_ynTrW88DEkZhTkTFPBdH1_pcieTBvbyHXoRV7i8HEx8eV27TgB_uuvbEvSQYqLK2HKWu4FbFQgXA7kCosAI1tEtRH_0Ylxs6OK3kU3pgH3B45.XIsHBJOnevzrohcHCbs4OujojwJQlnzl24jIqNxiyY9TrTtMjlRLhr.AkmRsjNTuC8L4IH4TpIz5mxNNP.CO4AZPtJzNyKwTCSvbAQya2hCgAfwPuez1txuJ14V_R7r5t8ZHYjtCBdePku8zrJUpZFjmjHZfza5AFXydZ8_MLAZWN93k8FVv.KMUQNUEsyS1YrSycT7PswQPMV9zBxYMC7eoxjjY1KHZLdUudE24lRWu_1AzuTqbh4Y3vvH1vWeLiaDuXjgyduTISUjWGQY6ZqxXDhwEbabUYKrfYaU_R5eBShLJxmu5HIYpBMX2LmgryV5tyaJWX5j_.y9tnSF7qBiitRQ3rDAPPnJhfOVpPB3XSWay5ozlYb8SCp1G3G4TRYTbVfZZcD.uCuCGFKF1xeQ79ejQj9JY0FEyQMGKTF0xyyL78y7L6d5zBA6HWGscDVIFgPcDwhLBnB96P1WlxrVtCmdLA3UpQNM9dI5Kw9oMqltZogzWwKN3FShcCzWJ2rVUSnOPetRtf.zW7JCI_7Qotd1z_fTevZKKZTKfYtriy04R45nV31MBiB4doYXZFXEyohEOWaH.SlpAhOuzxYeJ6DLDvxVPbNNta5JIp4G.JUWVpHiFh_DNIC8Zbn9SJKJ.v3Jf2o91FTlmKiESrMwXY5s7jTcthMFrjIF5RnPD7ETxz7bwAtlUUzZZzTT7xTZGyW7XRapvAhyCr9KMNSJ74r4krjhJuI1f.3ZiNqCWSWv00KdUliHqLuTHE6qTxHE5L7ASKxbMtwNPS216vQE4.wTcDRlFF7Kk7L9ewpZXAAA5Y_ZPbtcRjfsfiss1UWefcCDvTDcremCHwquWYvFAfrr32AN2yUhZSutWFJCq_Kic3H7aqE4odDmYyae7jJYB_gepSRNsJGSXgT6We.BUOuOSeaEYrRvJ76TYblFE93kuZAz8tZVCmAMubl0Wj63tbc2OKx0dNS2ty.ojEitEuYmIYIMwphkomxz1DljUYi57gckXjzpl06xNK.Vs8e.TN3Y_0jvcvZzqbHIn20E_H1VN66_QGCFexPUbHK1IvjWtSGZZe7CRzPa_tUwvNm2O94T1SkyOSRFuBnQnJtGESWg7bMuR1qpGfdZgdPXDp2M9N6H21wh2AlwPIA",mdrd: "3l8aA3ELsf3VyD533fB5zvTcIjlEpEMN6apZPT.0GFQ-1739215859-1.2.1.1-FRGfIHI9DP7yKRox0rHlVwN4mXLiv0PYIJnRe_3KLM8A54_.oGy.lRWbnrnBEEZznLUEgxEu87Pv5JY84N4nOfLmxvwqiiwkFzPv5MOxNlHzBRVoD59wsYEuL.L5.6SCtEf2QZfE8Q9Q5togo5sgkwNoJkdX9NMsp4CgRrJQZ8ivp6N2OI3I60_qbdOQ9viukvZl_r.qzt7imrgNzjuZlvd4F60YzZdxUgjhyuYxPykWT2VHTInjF6ncRKCFR3gHxw6cXGcqF1nwu2ygUH5PMY8gmDDAKLUsiVq4KafRpw_QlcKBMVqBORA6BAi_nD44.TSy8XXKU4iVCZn8KxsIg90f5p0sLrQ8eKEsU26r5Tg7n7gj3YlIVwrOa2PG0aZkKMSqOKwghQinfd0Vc0p89akuefNOmwnZ9W8pso92Lu_birCjlUr82O7ZDK.cS9EVoDsPx4J7J1EcWc4NDsCeF_A_Un9f1fMrNZ6pOm4pqdtNVYbZvMdizcFYorA9tSzumBqkyn2JlCXwW_sJwZ_LocWM8RFST6NV95h0r8gvD5m1CRNjliWZs2Y0j_9qvUO5fBnfTQM3IDGgtpnVx_i3UZslkfQEbxl1vsGb_CcXWSh3YcAAhiHqlyAECC7TaprnwTAq9KPmaRHr.Jsc4YqDkdRBN5bcLbFIKQWfyghM22a3YE6UJS7Zu4ijuokXr3evwqSDDAHBr9KjVO0rIIKtmpMg99p3NMOW42_cDMeiCOJHeRMBw4PBnSX99Sl2hMhWZfFPj5nhBC9TMFtQY4_aeiwdE2ixLhq7RlKv3WsfbeA6wuiomh64uJNXmFj3pFXPO97iFd80Zstv_tZ4oeVMLnQFsSIH2z0RrcPERKm_DwooLFinWyOuKYRzR.hKiE3gw.SiHbodwBRnQf6SI4Q2ncz2JmXUh5OQsVL2dBwWRpUfmZDYNPW_tgm3DR3OpsUovNhYv2XiL_k.ZaSkmX9jVmXsYfTOND2uzmuthra_ejJUWXnr4...3q6xKgZo2JPLfg.X2_sjXHtNXra3pFsL_pDlgR3HtltTllNwEyKXLy0pMcItkyWyizIBXPNW.BBUP2TJcSCUyAGsBs5lcoPLR_4jiPgjmPBF0aBYBktu1KG1AgwykipyuhesUJ05iIZH55rluePYoEsc.q1lK2Hp9T8..iFrkprcLPD9C.4T4CnZmjQuGVD_wGXXoinwrPn2ZvT4Fe3JaTQQhNcf7lvtlit5NGC_iw04ZGRxt5xfE2oLMHLiAjepG7hb0Ed4fc.eATAPhpYG8oYz6jADZHkc1H23JJXey3W2raj6RWTtTf6ABB7zvf2QCRKP6COJ2gXE8NltegPTrBuB59cbV0rpelq1MdjFTg6WMicESU8g5i7xxPVORCRJ2.SzPVjxMm97QmdD816KCMZnk7oIOkH86BgTmmajLddN_2wiDgcvbGMjG_qgNP_fph4MYQBM51SLS.raBp.ZVpIj8QDkH0iHRwgON6ZX9jYnTRrfO1jxelb8R3AkNGchbPPSkOHNlExG8X027Oyi.ryRSTQ0_3eV7Ko5md81kvu7GAYnAuMhotwuX1lDRDERKY15_Q0EvDWjOph.ixWPn0kIqLTK8KdcEiOFnrtxMHO.Yl5d3YXSm2dbTUisC6NYp0gYs4iEXRnDTNTJrMraud0G3W8oEM9xYJsHhkn6t_n3Khi1L8_M4k81d19zibfTlqmYr9OkDh49v19.xkou3BZfV9QSIChzKiOgxnJfZrrlcNyc9Gl7w3PJrOqOQuEbljqURtwRM7TSUoWZ5G7MRPEwH7SlZdX6d5EAhpccJprrnm0z5ILBeqgq7lQWX7E0sn1PBpm14QfsbyZMooz4QOqG7wzBxvUlrg"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=90fe84527cfd22e5';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\/4502179386?__cf_chl_rt_tk=DhTifu1DM7UP3ShG815vQDJGGoI6Bamm00njEJUelFI-1739215859-1.0.1.1-DYwY0U2iUBgei4hUpeeupEmWzhNP3RtlLfBsj.CE5Uc" + 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