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-7304896251-gov.caltech-edu.pp.ua/post/559677397521

  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-7304896251-gov.caltech-edu.pp.ua",cType: 'managed',cRay: '90fd5873eeb13b23',cH: '96kPTTXx7uL8n5E6OFDH.tIXENApzbzZ6WPx_zhTH_s-1739203576-1.2.1.1-Hn6QSGgO4gDw3hA.TI5ylYrIaV0DI_o0jhd1CjjGvrAf4dEJKyIRZkrHRGugodYE',cUPMDTk: "\/post\/559677397521?__cf_chl_tk=XuasPHxXvd3ZanpYDiDAEInhMY4Z5AyC43lVed2wpIM-1739203576-1.0.1.1-.wbtPWkTAQKjboCgeNfCesbESRy_OJhgAdrGyVtyDaA",cFPWv: 'g',cITimeS: '1739203576',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/post\/559677397521?__cf_chl_f_tk=XuasPHxXvd3ZanpYDiDAEInhMY4Z5AyC43lVed2wpIM-1739203576-1.0.1.1-.wbtPWkTAQKjboCgeNfCesbESRy_OJhgAdrGyVtyDaA",md: "Uyc6DZ0bMkK5n24Bila7d7cU.5JeXcVykpNCBX9MDsE-1739203576-1.2.1.1-5GP8gRTth3B2i.Mct0CXA47wDJtorKgVFuuT8rEDmX_XrwVQRSrqUgZ190tSlP4kR3lemDDaEb5yET9lr8MvD1xa.M81frIK5oirS5D0yg227xFL2MjsucvO7seH8GW7enV.IfauGMO33Y.4fklOOfcN4cfxHb.6CD98Y9S1JvCQmbqbnsoUGuABBOdouaJe0xYGNHmIVLibQeYpfHvDBb03pte2hSDD_mFS0ZxFadsd7RRxer2yiOzJdhAR69ZBZAvUPJmzPfrIMgrmD1NRlX1SSQim5DjMavd.uHIHIBFT6Z78r_9h76LieQVKr23F2PWsAIBCLas739pBblFJzAsPBTLQSUl76f378SWczxJ7fSj4ushuFliMXEevVWLJ1OGEIQNMd3PUXycDTtaG.KtYZSdWz6ENRIFk97jT34Op00UaY3Ruihet7UvYeXdx.NC4swa7U0w8It.5P2vUIqTwB4do6kCpPkJkdZ1arlfa24k8NKpZCHOut5z5MvS78ioUADJcMIpcEmahaMxeWQ_ZLU1MggXJbQQWiw5KTbEELJtBOmIXXw39NQAgDnOZN1KrJj0m8TiuUB0J8nrgOXxJbyTXp7CRoy6XJSCgvrz4ery10fWoVLBEhZCqtTRdUJUNUSzvQBiWG14cuC9ZmO6Q6VIlUdH3cWb1IdhT38ZEZZZnnKd7swy5vDsto2z3EzCS7bIeqtjLeNctjxDRycuaGimIqwFtKW3rWuMhEDWqJu.kfjQXKgVNlmj7BCnHyoGge_E5D.3obXMoHYCpTq86_hW5ufjvlJLLoZ3.lCj3QHkruV1Q_wazhS2bqSQJBkohDkhSLlUHkiWxgOP5FTBuaDoij9NjKKiRiiLsiuipNorbw.varnC_RCVFdqRMRcb4ozOAf73DD8EYM3mHNmsdZd2NEIiJd0hIaoAUhkWUBwCv_zo1Yn59UOhcJ8TZemWvOHBasW4.hfxGbgyxNXiCbNpa3ctgRROUrwwG9UGxGKUpxsh1rwNToqPrLYOZwWg.akWDQMnp1CiYTC2BGNT5s.pGNgne7dOtT2uWV3jY1A1GdmeKwOz8.pXOG_1nnUTlUbUN_xLVUvNee_Todo7EewQ0BpWB6afIE9NXzL401Kw7RikoaUJyISiECc20ZUc14N7y3IzVEIMQRhWwCWDjsYst4Wbqx27sTCtYXklNUPFDvH2uXZQGKTo8LdT17AKvgCkT35OMZuBpv1CJhcv5A.RmKHNM1szijwJxAdMlSplgbhq_UiaPUlm6k2xO_gEbUcuupikpceMHWBXtoMYEXFnOJUpGOAn8PKtNdVguef5AIkbpRh_h0_Wr4pFqHMfijkF46ox8BVdkuFcW2x8tDNf3hTCmjK3VVhla07cu0DJu11TqGqJ57wLDKsM4llm3g4TrDeoG0JHjH3c8OtxzNgLj4jTCy8rPK3gfl3FNEwLR9gQFsvfnLVDYxQBnw9kbdFTXt3LMEqg1dZVdwsppRmd5YSLJQ3olkvw6QGjqTZQIqbnCaaGuYVVKPhBgcYCWpwJXQXijVEY_.73elDlcqADIrOIcpsqXoUv0PfQZqzP.zRGWnIC2tiP5j7ksFKcgYetH7fRA3TXYEWfuKooLBSZZbRdPl7eTV94iLkHEfZT7xR23OBGs1JGJraTBsyYb3O8gmkyDXuptPjUqVaeiFTFPQ2fQ2bPQjjn.o74E5TaL.dQyXIZfTEjoHORFJVxuItSC1t35TIqt911qSQUk9AF0PDC0Wc0sMbO_2laM2FhK8dTqC_P0Pe.b5p7ITFHwMGrmxPWkP8M_JQlBtxmJV9GmA0KZaSheGGetFA7l158AYNVUs3HcsPYzMxxoOZFuObqyMlx4E1Tb9iBoFRO8er0izat6sSTi3vvwCVMex90Ig_0Z2UI8yQjvbfVZCJqOhW1TU_Ecxi2PkEb4RGdNJfJgJz.__awrgUbQs0QbO6WoeyFNtngnrPHbSdMoOYKw73A_jh2I_CAlPamcsqEawCuZhaX_kC7nk.XOT5bcRRvToiOBNmS8SjACWSa1yabEoZ4Hwo60cG4Xh2NPvrgbT0lDpWUbeD_SQALnuj98bdftIyXk7r5jdun9KLCDKYtqltSRYJCk8jMxR_T1hGCn6p3ZDPDcH270SrBuM08We80yy7ICoNzogO0y0XJBnMZZlONlLh2n7LpNEOmQbDBv3kFRkfWINDQKZ2YuWnhk.lgV4dC1QHCQ2fd1SKoQwRj4S610IhqqI.yYUnRZ.Q",mdrd: "Ttkvqng5EHej6Oo7ZcewykGYtTKqAD852ljlE.8CCI0-1739203576-1.2.1.1-auKVMunEGH743c2MzGleXly14pHjV.Ab7xd2ixxVnXDWywHXMV.94MEzIuNWY2h0Q1dQp9vrUQLJq4woSLgAp1mph7CjmO9ZzsRz41dhF7jFgQMtZFKeUiwZ9K9zUJ8S.YeHaCOBNPoDvgjw_XKJ7VIwCFoCvFQvbe6NJpSP36Y254GzO2WSxtkkkqYxM2CWMktADLO71btpArGYKNSk0Mc3I.eZh0R3wf4m99hmHDHIV7ERX0zR037yiJAz_KVPdwmoZMgAeeMp1tMqI1QZI4vvgfOgo9BGOaXqeQ7.CkC4Af_FjfG5Estr1VIIkhGCGNsb3dsG9yNbjT00k5bK02MfFt2KNu9p1AlRiMZAKaj_2KFTCcNy5ismBcdb6KrmZC0YUN.DMoYFbo4txx7NZ024a3vJ1ObVVh6jRvriA337RMp_VPXXrpjmdCfeonCVF7bM18AWYYuGOlpz90KXIHg_aqnlWKwG5pEKpKRkxGbualln3PYvKB9QVwsQ4bbJdy921Z9tCk9KG7xMwtucwK.GyvwBywGcksaGnowQs7yf_tnkDMDDEJENNo8KWjIzZ1FJ74llWAjJyzTpjGwiZBnX59egNCqc8ZWBul0IWKQzWRUoNCKxzZyK3ZNjCbnSu2.LgWyNLf7XAYc4NPos_wX714vWm_F7zZWc9ielFS_Y9yldiFS7dvgWpqbzzaEx1zNyNdgiK5DYePdqIqlK.jRRFs6oLX9lKzVrhhzlDBN0eBBkQacWv6mnY20Kq_XZVQtsYdHNFv5UQJhNTREjjEIdl9SdqfOO4uVMMMuW52Rd17HBjzBpEnhV713XmUNhQNl5oWLtMT7vgNsFlBZKbaqKOHxa3KytDgup1ncRm_7ktlqUyKac.BdUD7FqdwGkvKnGfXVOnrvipnxQJ63b6PPM1DH4Rw2kl6NRvSZAmyn.K58XqoTmMbbvBAQmGzk_zk9e5Z4WTsym1yAbChEXng..QIHXYx8BDZpOIqObLOpgnhyY1az7SmOvyJykmBZcgafnC0gyf9HqPIYkDvGL_21IADgi_y92DZ_MA.MaBZ7h7C3C89xyatTf080M7ECwYCBjq1mQxVeIW29MHvLoW_iu1m1d8WIeQmlgxfaNwmDiIGMF4tB9tJojgnzRrZQ7qY.HTu_6oTDZDTXhI5UB9.pjd1v5OQlW4xU8lHycGEYzZwfPE.5Zq8IAtkHDoeITIF_fLWi.y6uyY26hOEGce2YuWqYTFU8LPs13b2T62__itxVheH0SLLimNpNcJFrh4Ute11ykw6e3LYa4HKldQAMnCmzjcWpHVj1Iosyu3aqZ3N7z5tTT2e2Se.mk_WsM6wsDUtbr_5GMnzhERbIWaTzzT.5gHhqulx38lC.aeYKXRkfkEBzcEDC4CdnnZsZ8nEGeM2Xr2expKE0rrfIU4xWzbaCgHA.Cp9XGYZU2YLo5V5FlsTbUxux.5nArQi7l19_kexAOmKfmRle8P3Pucw_atHlq08wYAl2hknRlC2fgOpFLkOiMMUA7HLDBDMVzvOJebAGP9v1LH2qSBs.F36tUA_YN4w2jLXAxy4n0HCuApd_ZUS1jBoTK1a1eI8LWs25O8vzPbCEXSWde0dhIhMtlAYN9ULGlV0hmbtkdUSpxlnase3POExHh2vU5U7G_4z5JjJ7cGIUCOF9uAnYvTN.G3pHY9MXHkl0rvkr2oES6AXX0H1uSAM4Vw5TlZeSviWA.fqp9Lq.KCicB2Mmso4tGDfL14FdY.TV4VjaIABGgL0jV1rP5TrxWhJoWwcLVH7Y55YwVT8.S9NP6SruYvOjgE6VwFffsJZ0wi_vATzn6NlW9doRixO9Awlr5tUFC"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=90fd5873eeb13b23';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\/559677397521?__cf_chl_rt_tk=XuasPHxXvd3ZanpYDiDAEInhMY4Z5AyC43lVed2wpIM-1739203576-1.0.1.1-.wbtPWkTAQKjboCgeNfCesbESRy_OJhgAdrGyVtyDaA" + 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