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-1048327569-gov.caltech-edu.pp.ua/post/359986729717

  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-1048327569-gov.caltech-edu.pp.ua",cType: 'managed',cRay: '91011ac97f062420',cH: 'Mnsk5zMjG3MD3N7IEnQzty1.DvR4O1gW4ZJBYwHwc_8-1739242994-1.2.1.1-oT.JlD1Gjig1RyyJVM54_U42UrHSk.WlZMvDpvyGOgzZ_YXHC2V29ut8DEYqazh7',cUPMDTk: "\/post\/359986729717?__cf_chl_tk=_CEm9HFurJwozRqg5qDDoVE7wr9rx55AZvhiqColVZg-1739242994-1.0.1.1-5V482EmeeJZJE0HCffVwLaTeWnSRB92hHW6OJnvX2Mw",cFPWv: 'g',cITimeS: '1739242994',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/post\/359986729717?__cf_chl_f_tk=_CEm9HFurJwozRqg5qDDoVE7wr9rx55AZvhiqColVZg-1739242994-1.0.1.1-5V482EmeeJZJE0HCffVwLaTeWnSRB92hHW6OJnvX2Mw",md: "zyl93df.Uva4l3h1XARTzLwPdd99ouak8OFStw.alBk-1739242994-1.2.1.1-AJ4sX1iLz97RmxhX4sek6DaHwCZA3ykec7SjwnDslLlyYvAs9GKOWKFpBOxaENxslAH9WwGoEaJpzjyxPTP9pJNL4b1Lhc3U29WvTFFWiTlZ7vKvh6eeeqPUK9xxf4B_2u0UuPYsTBLe.xCYPov_eIdsCqJS4oLFWfWBsg0xtx7RnBZ8X7GY4xtf3AQAL7PunipKVmbyqkgrHlznsXAY7Xw3QbKpelxGi40SzaPUOhYZ0UrgbAUeDjCBvmgCYnF_LQH2_CMwgT83DcelnHG8Z33SP3kqBwxfd.B0lGGQ2fYPduC7aO0ecAwl.qi5AaeUisjxG_WjxcEY4vik0lZkToHXfZsvqVCMzy5VYnHsXJ_Sdf6uJHX84gL.2bsXNi1n3QuN.pcXMKSTK9Ba1FHxFkp.2_lBZvPWCo3fPzT1u.L0DFz_5CQRfwHdV7NPKCTnBHSRP9FwkPbL0TXiXIt_Svoho3taOzKheFni1804mET7B4gY9ep4l0S0o7SWwrlVaoo7Vc4np0wjXyrpcmtoVoUF01AweMB6ev2zhf2tepoEL2VKEuzrNKWefRE.1kcY7Hz1.12rDzM8KShxXBXGFzy.l5sBFDqw0CCpSw6NVv9i2VwHDvGJkIuBkoYczmJd125X7HS0D7zAT0SJgaCyOirFKtq1X8xqcEG.WAJA60fRddCeK85LbRDlPWbElMS23E8MkoOaKJTnlDBI3UqyH_HOpB1d5XzQqukMsNn74CLik8i4hx7xVf29BMJrp6uJMwVj4Irg2C4.OBkLbnjxyIOVacomtDSlInN4nwCd29eHQz5cj1.dnskKFIcTfzE85Dif6kIUZopXqOYeYEHalfAcm_3lHtz01w4xp9TSKoFHcTmhYwPMlQmya_OsjCWAR9dNgJVR9fYh9IHEbO9olZ7FAvrntGEcnedtwWcfy16VbnhjeO75Mw9l2ytUDZOQFnfL0pb2vVfXeTDTjTV0PJqIBkkhcW5pzqDoIlnl08URTSMjMBifroZjf.LG92uod2PufnuNve_c.dfIyInG9Z3tTjQziwBN6Gzvi2HiAteLEP03pFD90rcBs34qWZsipo6mqkHGxZhDiJcx3yx6GWDwz9ZE5cUdLPJLDPZRvxc40lmLrpsex2AsLTBURKMDXX3yXic2UyARWmNN40UCoI3HAI5myT5LmXODcvYc3AC6z9OHIPICv1yu5YQ4n.QBTHCYv7wqYRN0ZS12Kj6CW_ZAb_90sz6W.avvIqqWHXEk6kRB8xH7FmzFLvVJmSwagwuXPCmA.uu5x_orfKf_IW8buDLXUB8d8.ak2MkYrDhJKTgLRvI14J.MBeFY5XMabnqHKZGphzkj67vvQQegeLR5vuV9ZtiLuMOTMvs_rv6GJuDgmPu3tbnpy6vfoj2vgqWE4taZCdZBftZvtV82LiwuiVIEen7.SkIti9UxcntPqHo72_SZroodN6nGtXgC8a1NVlIhaKIzIncw80WZUzFQYRv0Kl2YWGgV3eNaDkgmclij.YkzGUl0BFHIRYS0XJ_ZDk6pRRR6A4WWLR7pVqrDgstXqQpW.l.csd50pYV08mPgcFttFicY74nNc7rBheujAuPJjdnXXQV58EB351Bx0CfY1sHypgBi6gT1Q6ic7cFz0Jp8OzSviedBDgCr2_L2ya.yQF.E5fCciOl9GWqVOOs80Q2MJno6MHbNC6HjCk5EG3mYxnn16ihCEtsoHnY3kxKjO5uJNlgemndw.h6UI1xpdzdewZSXFOAmq9qNO50sM7JDRBsOux61HDegvOdSvtno2Xq5WFpQT7_Eqfs8xciy3JTo1pcHEL20ZrARpP8m_VucF5bEGwpeSJHFmfAYkt55l6zBLPs2OYloq6HFeIUkCUqJcYPSgBLtOyMdQiuEqwSibuJv8cwAqRb099CAUcj3kIPf1d9JGquJlH7dMWl0oB8yccbUt73fn9iHwBY4n6i6eQPTCCPpqxQJx6KjMfVv3vtuQlmo7C8i2Yma57lFqy0U9dNp1JG77hG8o6dORqhTKubdl45yDl3zrRgSPwNdswKf4H91zlnCbyM5UPfCkHkdePLjfZmTZh4x7xz1rxU9GU29Kw1t0XZfXKTdS2.sv33PyOoTsMQmRnNH.yq3jdgVPhw3sntwmilgtUevwe4TlkRc01OQon6_F6BcIj3Un4xT3oR1EMv29j1f1ugN1hy5BCqaNw7w2q8Bz.BuTMdTZ44fCG3Yjitu5.ezF6WNqss5eeC1ex1J0w",mdrd: "3I80H8.w42Gz7DuWgSyZ6JnjanbsbT87cBtCXz6ywok-1739242994-1.2.1.1-dI_vFFuRaLavU1PLEzybyd.ZU6xgh5xSXeeyixY2v4StE0qTWK1yJCy.x9cwmZtSAG0zBhzp7SVnCVdLCCH51PZerSIzEGXWN82DbtFdO3EVoH8fU8ijOgAML5CfvHvqzBbv1L.YAA6GGHgKBAxPU1U76tqaYr1v3RuZpknsfbRRydEid8b5T9LBbATJFbp0XlI1rtFvHZBM.vv6gurCJfo1U0hNDFjk1vDtiSQ9uDEMPz.J_LIEag0YyGQMbx0LREOgR5CmqTeIORfOOyqtDMOK.F7szbgs2abEaTPngAc7htS9NTWDlU2vyIyxVDVLWTdgKQHnJXUzCtLfF4IlehUwIvDJE4LeC6wr38b64PVNpFqokkQkj8f_x09BpTmxT6K9mqYGb6CKW1Y9rJ1KUt1PANQP7HuEds8_VClsP40SiSCWP5VyDSu1nclFuu0xQmHHtvQzgkJf5bvwsBtjgigJvVz9PGehHqh6T3mtqdCCAXtNe3Av0RvSf_995iUSf5fAhnw4wBnvTm72fA36lyK0QNJ_FoD2PZrZLdWb_g13O8NB_LGKgWR01p6UCrcq4UD3Ee82h3_7O2WMfOwRc1G4CMHHCt26Ez6n0TDVcnsGevZzzoo3C1NAfb5nohMBQkx0PuLXTwtM4DZQ36WH2G4B0YOumBSJLGZcKiQRQYhbu17Bijt.eiu_EQqy2nnhq4KsP2wCNMquZND2epGTdWsvzJEd1a.6Xz60LnzJCO4Abhg3nr4B9rfQUQLVWD2E4QrJwMBh9SUoG3u6luJta84HZbWeuW7oHZzawH3hMnzsPZ11ILYii_nwgNaNi_u8Sx56ofPn9Rm.eYLDFkI4nPB1ZS__Y_.hYVpYCe_6sz1Tst6TbuzC9t0uXGRohhFVi9c6QtmPW.rv95g6fTNhxUCWVm0X6GI8W_dFg8yqennItaAJer3drS0vUloMrkF6yVi3rDG03mgI4rJrTHjJlMtthUfVRuLPwJ8CwVQD_X1SlmYHekndyZ3vWjmEJEmIu_8muxjaqGHJT3YRGu6AeyKh2xcncD0K0SR7zVYiAYG4yNHJA10PCft_JXX0psknG4MKEZCZwdWyxWLkL.Jq2ZaxV2MXwy.z1M8zVOa7x2Jco3r829DM.Ut1eLOFUYdYTxL2CbV7bvsNXd3gygiJwRylSeXi33dtSGK7.En2_MT1rcWk.5prM_RFpMsO9j9J.kesQt9HxoEh4VDMSuPfy57OcLpn03uCtxT_h14d933upW6Jec27ednzv.xSzSAqJRSmponldJ0BFrSfXcTSfLoECGlcSzjYoL2VhalHESjidBgtwMjwoGfQHbFeAyrQyDWbFBq83LSMxusAgbPmMGg4u9kvESYVNT5TPuwf9hoaP6vT8vl.nzT9mpbkgq56y28if0c_9GJs_eeXkN5iBz.76YuJiYLH5egekJUlcuh1o6sepRhGQ..3Psou_.Exrl24vmrwsmutJ1mYnCdpKcrBRqEVm7ra1V2E0LNmR_GQUR7gDAW49UdAH0oVRrJCcYEBV8ST22UbN0.C7NbA9aFLAV8KMQw9oRdD2eHXRgmiavxlQwepZsbRcivO4eOUGF9Nf_YFzJ8cGyYXR0fB5r_19w.sVy9zwQr4zWll3aeh5CwZbcuxDbc6RAtCTHtLXHX3tIp9xwIH0gM50z0XN8WS2FrbAkxDkEoikR3GP2CWyPQ1_iytouZCrNSSyHPBnNIo9vs5ihjq6ISsI0y845JNOkd3nRtLIbUjcVUY9ikPph1bhEdr3EnUyP5sEtNxQzn4hfPD7zgUFkaz0Ps7NFo9WeJ9GheFZ2WW_kRDBrrs9s2enZYcR1aUpcVCJxiu"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=91011ac97f062420';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\/359986729717?__cf_chl_rt_tk=_CEm9HFurJwozRqg5qDDoVE7wr9rx55AZvhiqColVZg-1739242994-1.0.1.1-5V482EmeeJZJE0HCffVwLaTeWnSRB92hHW6OJnvX2Mw" + 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