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-4169783250-gov.caltech-edu.pp.ua/post/8103796524

  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-4169783250-gov.caltech-edu.pp.ua",cType: 'managed',cRay: '9100d60deda9c97d',cH: '7cRM66OR85VDvvCm3Myw6pwDPAFwQHjKMQeLAIdnS7s-1739240178-1.2.1.1-QXABHHFWXKKSCNIWN4obDfF1P2CG5cQHw.TN1b.IUEnfwbiFuENfeKJOk6GbqSNe',cUPMDTk: "\/post\/8103796524?__cf_chl_tk=V9LZED9j7K3Z0KM5SOa07ho.hprAg9T8Lvz1HXxkNKI-1739240178-1.0.1.1-4_JUaifRU1KExzDwn3ATY60Xfn4M1hfyLemYAY8KTw4",cFPWv: 'g',cITimeS: '1739240178',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/post\/8103796524?__cf_chl_f_tk=V9LZED9j7K3Z0KM5SOa07ho.hprAg9T8Lvz1HXxkNKI-1739240178-1.0.1.1-4_JUaifRU1KExzDwn3ATY60Xfn4M1hfyLemYAY8KTw4",md: "cl2zXk83W9eppa8xbdrYAOTYgUsBGXYGAD6yCrCKsk0-1739240178-1.2.1.1-t_Vj0xSChx9MtveHVlvzJwVHFenLeeR55EicDx408Ds7cxu8ct8RGPN7wIADmEZnAUcLft7IY9Y7pzzeVgC4eo9bmcjRxhek9bZnH.SsMi2Cfj39QdhS1A6JSVlJZ2gfOQ_Tny0nzt2Hgz_CtfsSKSzKAHhUPQx41zpVnhZppTG11_xMtO4ofpVCHCk8zp4ZK0aCr2G2axmt6buNA.Qq_t7Hqj7UTnZ2ecdj7iwhfF11Lx_abOygyUt_MYTnvgYGCMi0HnlSSyHrltWYQwa87Ly_2_0TMadUAhgzUgJ0o0xXF5z6SvEzFDAkKOicR53COjvkjkoUbLLIKa8PNZTvwE5dtHOoO5hitLcL6sltzh.xYE3m1cJwbbc1k1W0T5JW9KDl9mHeqkdd2h2U2OVKi6J8B7nBEhABima2I1_JAEQ4Hug37Yf8ELxpNQCRSNTb7FbpoRZqZwJSMlaIY._WCRumFh8nDZU8rQHRTx9Uxk5KKOJPRkSNZGoIsxoLXLVygnCrJbKh1NqIfQnqQteD6blgTKGsRHVqdrGQ0fDGbvHrKBFCeiEnAtTkXpnFgKi5sEO8Z1qkGsSNkCX7liSTD9xjq.Ebh0r3WeOXjSKJMN9fCd1lHCJoI9xDbh_Yx7EiMC0VxNnfUISg7GvuaBIe_K7eWfF.FcjL0DTwMRqVN60qfDZdL19gMVBQg9j97M4WOcrGMV3HVZjfz9vFbyzMWav8yjv9i7IZmj8gD2GbZPg5C7FNsKdNrABCZWF3wA99_6dAvd3lNavRvPjU4Jlzhd7v2.8WrForQ1v9ZVywwg3Y2KN_ElGzPwftWKLnQFR8u1QBD58H_5LCTYrP0dt5RfgziAGEFRzJGsc1lsAI4azj3UcjSk9ZkhrOjqJzO8mpU9EDl.3z6rGHiKPKUqd3_kj5ex4qgrDcGBUznrKEEUhRhBSC4xepRwe3ViuQUmjegAYLyqqDhf44lHi4W.jBEe5AnzRwG4DzBB9HPbpruRQwxvO8GdiGKtBK9EDfUf2yBpqyWbcQMVKpjwreXJ3fyIGGnYC0q8A3TuuibhgPV5AfldnkHdS59khifrwOdGqcasSFcO72sHeG7xFqR7Pn2AK5G6sPajJDyZm9X8VPpWBnwj4ZufoK7XKE_uaAEIttF1DYpKCJE5maEVBg56biW2SjG3a4KYvXbrGswBpJQdhDbjdohoJeXH_OsXSzb00eTQm_Dw7pmcptd93xhZwZT3t_XFWH0.15RglmOUodwOmJwI47i4Fd0NmvfdRNhltsh4ZtdONEbi2xZ1cR.qhMJldKLxHmlHs0DdprvldflNSKDkgOfQ1dKpOmDt_ZdTMP3niuNZn6RLZ9p4gVTH..apqc5HNYCgITCh6UPUmg.EjC2dKXZCfVl7SbPrb3Yn0AelRIOvJqPil7Tts7670YU8kKd_Z82Bmr0.sXHYkICTykMT2groYx7dTnk4g1ZGwmYs0KxA1b0_GeWvOPn1tHsYow.K9QylsZlYUAdy.Vd1o164IT5cvZfZh.2ml40A8hGPv4CTq1pxyad7_H3xG6T0cFmQ7WxjwH_zlW3zTsOQ3ukT_JCPhvM2nFDSS2ow9nvuC2LK0g5C.33gM06WjUa2vlCyAktztBYuajXXsrPJPGm_9YklsmUm8hZBvNhe3EOxqdx..IzLK8eJ1dXqfrrsrxTN1jQBKyJ9XJmo79cyF9zSDjKaJmCYZ7YGBAkDV8AYJH8jDxs7Gwlko6xWgo1AXD27dpnkRgFG9JpLD8p6nTKRBOb9Idtrjgl6IVNHmb5V25ZlZhmMAG_cZ_Hu_UDow805aSwYpJGGTlzrvAUIKmUa01qBBROE3.tkppDE7.Rbio.NwAGzz3AJu8iRinnA0CLBH_YtVoxVlqFXKNxCWPDfp.uNeUXbXorAOejnyWP8kv8O0SF6Cv3UaI1.6cj2YQhWzYgfRumwDUwxsoPNoxyo_6FiVvUBsd1zegkmGhvq1m5bGNa09TXfrc2yg2aiFUXLx9d5rm0_JSPh_66QBLyuEkhcKhTiyXXEUd4QSsaPnYkEtyHUYBgoAWF4GKeBsuSZ4uFHsRVCh8kER50rXMvpr2eY5TSJtHHNuRgmGpvGjEnY7iQF6AAQfNRdgITnwAjQuzIajYDAPVDpi.Mdt7B5fYE34E08K5gSnQUA31YSrDHe_W7bRMRvCiOhRIqaRsMesOKSP3AgBuy2n3OUJjthaR8Q3uSttP18jPIkaJnKkXvvMqWdDLaw_Y0JkxVA",mdrd: "rQE28EnGR8QpHr9Um1thFOAwnt1ZuxTPUbPHT6_vUIY-1739240178-1.2.1.1-qT_84EJ38ftNgoyFaCVSBl.XlWrMw8NKn4hsTKQDxYMdBHvwwQYRbncrQ.vlF0ksLNW1tp_VAgbX.iAVi73qomZprJXVbxkd80IqTXKMR6A05NpJpdtjKp7.Ed.ZLkPCPux6.vo5WpSz9pF9CqOIcCJ9tg.e.W5G2SkAF3dNUc3P727XBpS6Y3alqvH2_9Axg47hV2tuU8vCR5OI1ZlJZMWlSMyFFCola.MA2K0Ymd28prvDOQujL2yOifWwXmbNG9pIqZ45pBHnbWXxv6Ei1_nqW5qYcAizPYM0AP9Vh7ToD9tG5gu6szjONUNN7zPnl8FzgANIHdrUC9f8UK7FB4EcTnWyrFoGzuGYELskVr6_EwLh9P.nb9qhjZGjt.hFCOthCUTjwJwKflyiq4DyQUfmNJkcmsKmmjAppTDbKLQB0DCi9FRvASjVgYKKS5wX5CAcKNaTSIzQz4I2dD0xwQ0mObY7s.XeqmXrGMH4Y2CRwM9515uFJHShieKlJyrVfVEC2qLykWjqtz2IH2cxORgwI_XyJge5Ti3WwsvkEqO19wvVyQ9K0f2GQtC_goa5oXZuRsqZ27_Ml9hZZJIRTie8JS_AV5.0H7DqprSEJj.g5ergk1FILYSvYWi.CeH.sQcTEC.svWDszvggdq_Q6V4FEtp5BNv5i4GFBTSk_RmFoPrz135YgmfL8qkougRBiCWtrP_zhCoENDGvOoHA5izGG3KbU5B4NjPaqJ4NPO2XgdlPhV_.wD9RS2m.pvYYz_fWNRCegl0AE34rXpPRY7rEmE0yFun9UGmBgOy.P2FxIhKyzFcIA_yYVJVECfPuDsT60vv5cGn2PeinnJZp40MX1vrlBevJ42CWKv1A6kRgTUbgSGB6NgjwHFfITb9JuNk_MHFWdNHwV7u8d5mmc2eMDg1V2VyAR5rOre41NEskCr_jgjCIS._ZK5.soHqyqn51IqAXMHx3NfDeGX.ArmyUCL93asLthuETStZpOgC4fHszm_MmXURoaH3F7lE5YVb4hxNDirYGRmcRLukMQaJ_mY6tPkpmvS6C1GYGwLI6doR.NS5DRCLEt_t68QOBRu9hfRCiY.nXMBGSCSu3zhnt2kGum0_gVCFoOsYslLCLokzcCH5NK1XBY_0to2JCiym_DaMvRIj1qhgEo5niVOcR73vuyddMX9ZBzsdd2NjyfZhNmY6m3.xYAjAmLowp0FS3BES3eKVn7BcAqN4p48KsnYJFAEk8cBA.LBoR2KG9mlks9p4u4bVzNxz1OP5DnUcOQiD540kSQM07wl6AUrzKSnFWIDYNi311bt2_74zrtOBQ_7C3ozxL2KRUQ99jGGvanVuXQ7O882d1Wd9L.QbGmcoHuDfRGjxqi0b3ZKs1dmr6ImChX7SvidPgf7ArnkWAmelsmGNLPPcQlE_NSUHuS64vKY7EtLDusgybZfLUzYpZhQIIljCirlrEeGClu.iedDKZROEK2NSlOfefNI5UrZPQyfNpPjdZCAuK7qlb2ChnRYV7H52Z4USAoQAX7e71FczXNgzTCoYq0pkasTQv6bugocDwDDzc26hdH8bKEpMRG.kXYSP8_ELQIkacl2f92TlWKdVqbO0NJPnAQRmUk52G9m6wpJ5xBXOct2qNuHhb1I_KOjR_fij1KwXW3hywp0Wh52YmxYXcE9cRZ2TKVLJwP.FjJ9Mm9IOWMQMcBIcWnR3HqA63mDXEHcxRg1Drhl335JVtBRaQQrpIU3mkRfto7fzPiBKs5h6a1.4XMNov2DQrB.JqsoteET83_gSUPZdE9erVbmOHd4X0Bae7NWao7pMOT.qPRoxjSIdrtmHpG1DsT6o9cJ3O7Pkr"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=9100d60deda9c97d';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\/8103796524?__cf_chl_rt_tk=V9LZED9j7K3Z0KM5SOa07ho.hprAg9T8Lvz1HXxkNKI-1739240178-1.0.1.1-4_JUaifRU1KExzDwn3ATY60Xfn4M1hfyLemYAY8KTw4" + 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