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-9268043517-gov.caltech-edu.pp.ua/post/669221358828

  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-9268043517-gov.caltech-edu.pp.ua",cType: 'managed',cRay: '90fdc4fb4bd7d6df',cH: 'PhqWpud9ZhJj2TYUUxpna9qSwyON5VkIkPqaiY_syiQ-1739208022-1.2.1.1-8UsHR8Iisnu8U8o72jYzHy7yQq5.iE.CVUHXZKPEWVuk2n27M8U0ehs9m0A0XMW5',cUPMDTk: "\/post\/669221358828?__cf_chl_tk=JfyJBTkQtVW16PrJ.DVjTtHRs4m4uKKe9au1JUGkUQ0-1739208022-1.0.1.1-oLJhWmDVK1NwnoPCnQn7IMCPnNlLOYScVAZuGGWNMZM",cFPWv: 'g',cITimeS: '1739208022',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/post\/669221358828?__cf_chl_f_tk=JfyJBTkQtVW16PrJ.DVjTtHRs4m4uKKe9au1JUGkUQ0-1739208022-1.0.1.1-oLJhWmDVK1NwnoPCnQn7IMCPnNlLOYScVAZuGGWNMZM",md: "avRldfysoXc0S3sMbSFsXqpaQQpqWqE42UciWkU5tpg-1739208022-1.2.1.1-ITva.UfPCtnGcvCH3a8Zp5T8PWWhJQQkfiOykWt03LB6SK7XWyuxUYizJcUMOLvDCkt2jQciHcWO3eZdUe.GDLScSJab5zNX.GgLxYfsCTjESrrDYgQQ8aNf3zTpIiZhpPnvIsFImj9QFRyEBw3GI1SgfbB7irTcw1QL.dUDeZRdEbhY5cHSCpvEuODv8Yink3wyWUcIKwaQZmIYH.rR83rqaqmvi6JKY2B6G6zT0HYvELhQnWeQcCqkQRc2c6KEhvEHDRhzZZ6z.3Pn3clO_cL6rN4qh2Ijc8XBJqnQ6Yc6qgaH1KqKSvMOrH3kY33eqQ8fLLV6QzgaYdx7wapPeD6SWoCRSPPuM6Seku7MLs0RT1MwG83fSYTcTwqxszXxqhVRdocHxET5X4SXuc3DER44xBOZY8O5s01_HkaDyHnfEYxtn511BLSWV0T.ynzGJYKcBtJQ_RNlsrK_QSjDHFwAmW7fZCBo4S7VLOZCjd.auyvyb8ug5XFWDj6WeXPzoRSzcEiH_Aw3qt9ZcEbe2S0ZcTziIkNHXsuWt3nx4QO0T1yIZFGpKQLuKHfusk7LHEcf5N8fAHNszyHY3gnDFuQu0g0ipI0khc6bLCnYVPSI21otKspCnQ7AX25dgGyeCVgnbNIZGkI2epGmjWmz5R5PN3D6wUr9Vk6jaZkaJVIjUWEFbzUbfNc6TMrTCsWb7q9TXEIOL61ySntSZrgoqC3l.B80HFQgMRsKsNe4f0bsCeqjzbHDkK3rAJL.xBDBgx7T6ADuEP403XTyKTQYlz.9Btarl2Grt_V7tuhLVX5ITgykiv4iWP.lvchVtnijXIXJj3LJYzTjgJqGv.qrL5dpAOJUwtQqsA1Avu.mdXtLL970j9daC6gr4EGHJ5fUjmpiuhRmlUZAFggMYOcABjrUqJJN9wa.xDKS8Xhv7_eTYrFnCEQUDP.Rzp9qr_REEMlVzdv6tnv1AV93GRFVMt8vK8Uko83lR7sTii4scuOxcf9x9PNUuobx1l9jhVHdIAgsXTBPUVUnjKXlX9zQ8kvNFRG0VBQ5TyuiwwvhfIyNkAXhicCnp65qzIHrknnvFp0LHaG9iecCe7ltTkkDt8jB8Q4RKs9_hPPmwxch.2cPywtIHaIZzsn_7bMfJr7SLlDaoNvycdwqozlFCr.bHeORHDxgNzRCN_lt.Vh_mXRfHHElEYHC86qo85o9fY0W0NXciwg5Vm_F4s10VU77sG32RJaGiashlS8jgXUx.s3vgKJei5jJJhlATa7YDnjZdg4FGUNw29YspzcefYuMukaQhi6qM8QRlWZ0.QDl8Q6daKjJEQp67dRUWS4X0MTc2_zmauGe.k9D3l4V3BuV99ayhZQtm.OT8KwzvJE.nRifu7t.dcEIwdERVGlLbdbqgmufYkAQyawlsklCAXQo017sgY8zWxgtw1CQlkrM1mGL0JRQIxZo1Z1OcgCn_vZkF7dSVZodfpftA8cypKNQbMlsb.Y2MscSCKi3uJBzhTHA0rA7lcwufUWchodtJEggiZH0Vc3zeV.dPoRg1UAb8aCSCT8aEy6otYywTt7deFXfZZCbqeVR1NzPLpDmgU6yjMU.IJbOJD7j_YoabfIBFJCiNfpSr6.TRNCqyMO5PucCGpqCHCSyC.29ZGDIz1JE2I7baa3eIfjo4g1wgCxlBoBhGy.O6O8dVoTafFWOEIaV5p4l5M1hKcmnjgdKcI5ZLn82KEKCNPn1DtYA03PJIrPZW7T0BIFbhN7OLOKLPGioZvUzKGIm27fLaD7lQTfzTZI2ApLbogjQLQWtUpDc82wS4xkyer1NL4CVWFRHMk6B8jdDIwclaUJ9j45k.LCXZ4paQZyBMkDtD5I7arNoEG6gUVwgbPJOCDVDPJGk5p97AJVYOu0XxYo_h6gFSaleS_76qMXHfk8NTBIxnFoKjU5tWRRyIAW2lEC8Gee3Zdjm7LOXeRqKv3_vrfPvqVVihiIqOuFuugCARpJfh4hAj3_Z_X_gdpeEUt6uNo6RKblInTkfwTzWGBBl5KuTzpzjW630Iq3SZZE5WoxZikHwmxvDYPmehjA.0CPcBg_e5gR8cbpxe12xyt_ZBkCBmWp8TkMov04iX0hWHNPAggCCu8vbGXMfCwXYJ0g6HbbvIgFxAWkB5Zxuq.Dg.RrVfAIhAZbF2NJMoywDCvfcwL9W002_vyiDA2zOLGUphUePPbmxuGw2odyVme1D2Sq8WyVtb.ovaoSbnLzUJY2OJXzRuQ",mdrd: "0AwEl4e9kSX6GYi9EOY33D2ppZJKYvI7YjOra5ebsZg-1739208022-1.2.1.1-MambtGdgAliU_cBguHWeP_03TqJzyjqBuFziEI2.tG4Rt1qwjwTjSUEpdlmTluw.nT.5CQYr8edOEZBU1Eym8Ym3G0uZiq127gtnN7rF625lpIgFQyZgFPKDx0W.RIeJ1fwPhSQ2.dkjC03UxVU7DrcDnB2MJvn70FWy5ddLnclKwVMXwhrjqbGb1fpBTsxHvgTN8g9xHRB6PKFRmtHFEup76TFV8RYGHKAv2SrCa0eiTy6u6jRkkHDS.56mX.JlDUgaGbFssBOsO1TrphkIzY03hLeL2FhRhR78tAKfVn5CJYkWK9GRvMN2Ie5TbnPwss4nfUn_yKELrFSpLYhdtIQ2FoTGMb1BV81i2PbNubEzuIbp0behUuigVMUVAE8cLIaElAxBKz30Qkl1nGkA_tihjFNNAc43IwwI7C3S.hgAb9AfzgTGsN8slK1NDbnoCjaAH_RWHM44KG9eqBAY._E9FUppWiyNksWAgE5JfM4BFuJ8VAEQ4AkfP6jaYQTwQGLzZKpOb5qbmeQuHZ2IcbOeRfAATeo8WJMyrqAoHq9iQ3LjEv4rCPC91HX1BQ2rcdf2t7nEVtVtmL2ALoFAbvxk9KHQrU2_cecIyvqBV_ONH1kFTCNJynl6Wjm54zO_Bo_PEv_VNkm7fJvv29tWS31YoWEG8mRZgjlaulhXpsulfo1T1Nml.lN_uGeAYM8GlkAbFyCxoqnxo7BS9zMt7IBACcPlQeLkkLmReJ8m572CPT5GZwMSrZnbW8K.4HxubiaSUT4Vb7jKSLphP9ETnqb4GwAn3B0QFivZi9gyPuXZQeMSV0CLTj2wGjDO5.doJ8cKWxVbzQ58wgeJ3oLBC1eLAuiLBYATCT2wt5na80jw70P9H0X0_5rsVRxvNumPqQqf_edcrLPFLxZT1Hst9KWcAdnnFofdOzNyFH8.D4g0hmRyDO3jqLXPOTLLLDB3eBLBczkcweuL7oG0Ray7oTN9uIhytDVbjIg8JKIg_KImCvlKSQY7D_ABlKMhKyp4dM.iM6g4cf7PQGffVK1b.Mw5EupG2C61W533VceWXIf9ky7tah1YZmq.LMzlPf6SCIaFoKoKe41kLgLO5O9jLd_O1OJvLMMLak9u.Jsj03p3IhRGaHFSdpprLy25jRrakq9UgS8x1jrKiE8thWZlu1ovQJ47Mny4XmlTlJmSHi_6jeGUJBusNQ7craHlMcGm2zCJJ0ff.qK2KFwT7bLu3j2pWSXDvSkY3wM8JzlfVzXTG0lXroe03nZjVvEbJL8VxUuw_E6WmNxVJjuQCNCQOjRGIygFfQzn7Nurb9j2IN15pErgrSt4UqL9VLxWQ6bMkz41xszxVL.bdxaQ1RGPUoN3QO8A1MUxJnR.4slTF7oOl89W6w_U9_cvsBLPjbrEWnDhCx6jh8I6YkeKjgSW9HZjcmlbnVpmWWON7BtOq5RDPPdw9jc9UXS4tyK.bNM_GHZ6DBs0XPSLshFlRfjlcrKpVn0wY7sLzJqY6PKkzmrafSEsw5FkrVUwZjpkZ7_XGTFgk5y.XpPChiUC9WPZhdkt.q1wV91ozkBAenYrL5Md.COUr.xHD4f76TxlogA8FnUnukUTDV2pUiO53867O_5aMHo62XUyijH6QTui4YpwGQ_1SkyvZLUsQvph.mNL999EdkgPZ3VgAlS7vjMiKCd3VPSR1XvFk14QbHg2HIUZzsvtSVks5ulT2bZOUL8Ijs_eLcxem1j.aZdfkw_osGMw_wJVl61FSWPR9ZNC1DcMZUkvAOD_Qie0vNBo9iMDSfpEr54SdXnN1pRxiXNrf8UoAuVoll9drL6X.efpxo1WvWkR9NqP4c1qTdIfkMFi"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=90fdc4fb4bd7d6df';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\/669221358828?__cf_chl_rt_tk=JfyJBTkQtVW16PrJ.DVjTtHRs4m4uKKe9au1JUGkUQ0-1739208022-1.0.1.1-oLJhWmDVK1NwnoPCnQn7IMCPnNlLOYScVAZuGGWNMZM" + 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