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-0467283591-gov.caltech-edu.pp.ua/post/225900401313

  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-0467283591-gov.caltech-edu.pp.ua",cType: 'managed',cRay: '90fd2ab68d8be61b',cH: 'ZxchvrwUfOl9Io67WExONFZPqv58kCYehhipFnJ_XAs-1739201703-1.2.1.1-zEscSlsvJlvC_6MPCCKMCO4xyf3pcDeKvhjOIk70YLeuVvw5odKh8TDI_itSmULW',cUPMDTk: "\/post\/225900401313?__cf_chl_tk=8PpTyW.pvqae8EJ_iLTf7rBnzAkI0_SWogN41F_Z7rg-1739201703-1.0.1.1-8NFWBVg26lHcsyJvDsz6QT9Yi2CPaTGKwBodnZliPgY",cFPWv: 'g',cITimeS: '1739201703',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/post\/225900401313?__cf_chl_f_tk=8PpTyW.pvqae8EJ_iLTf7rBnzAkI0_SWogN41F_Z7rg-1739201703-1.0.1.1-8NFWBVg26lHcsyJvDsz6QT9Yi2CPaTGKwBodnZliPgY",md: "XyJIfN5weuD0WUgwRXgIQFDaxrv5HSK0KCpPhPRBMhw-1739201703-1.2.1.1-7cEYe6PAz2N6qdz6UjKE4hpD80XmROlzkQkI6rLQMTyUBqwiLWYjpkRUnpnFXf7iDJuIVAM5eO9..yAI02K.YGplcFZ095rPfEUMbqJ.ioJ5Zay1tbvd.MI_7bJFNnz8_iow7B3Xuyod3dWhoTftpLn6k4bZLB4AGfHVyQ0WifDU6HKy3I8aBz_v6Xw_4VlM__rGNQlbh4zbaoxzH6gCWJ_7PNN7iatlrJoDn76eiwGifmVEs.9X5OSPPUZzve7Sbmwucbb_mFVIK_sdP4MigZ4Wl2oZlJkEbGLIr6s0ZFcAcEhVWb0nPuvrE6ad_zn98TLsunfi6tSOWVvNA9j9KO.hLyJ_oqUOZ21aC1BDuPM25dIEbIVnVIACb6_ZeeltXvJlk6intFzPmTH0YGO87nI9KB0lua6WBQN6GA85x3wxbliLZWmwzly.ndJ8cC_AJC.18AY5vqrsw9J6UUTuGzsj15QAWFkevL6RUOIHJ6ZU0fo2rz3c8KucbHNFOAg4fTK6vcayxsc3liSmRZ7g0ocGwfvgsgsMR5xwxHH4vpfNuGul4mu_6KYu3v9LL9OawFWCjfJdllb6WK6i7wshMq9zrDPn2BO18mvImZpJBMw6wie_QbIUXgXd11pKUh89br5m1BeOTdNQ7gW4ILTjqWJW81Oq_3SAz6u1CcZq3Hi1GYEIciKbM0IMw68T3K0FwGU3hcP9AIa7OnAbrC75m.zcmKGVgFNwi1g_Ikg54YqRhMOzRF2cSA2flxZLYFCNfRFbna97KfdmPgVupApD4RozD6ZLo_WkYACup5s4pajTCHh7bsS4nKAuUFvv6_cjEhbpIo4XyxEi.Lf9oj.o1dOrV.BfLkK9fHzJT2rAsK1YmYy_GkU.XRuvDNqxnoIsT26JwfGBrCk0TytUvSHGEnTpWdWk5tfZ.ols3JU8i8RAdZeP6JRaAVNMT87UQ6aYVpUw45buPa1tpZccuc86_23h7mBjH6I7TurZtHBDGAqhSzmz4etWa78YHzAC53YNqADaNvfN3YcEe7pscn9317yN4L_BF0nLmnvS1M2kh5MwYNjgzVtCMy3K.ghNZsh1ebK2TFphStl0WtNyTuWMCoOZDKD33cUO_Gn2.D14VIIEHDBNUAQeUbWwUQV1taPErrBFn3ZHAM.2FYQZV4BfU0hmPXCY8UPs8EBzrrpEGba3Hifur_bsfJfScdikSRYP04QSmx8EQVf0O7GjagQzaAZ23SiRUw62wkSOuAsIsx7gGPkOqEBAAS227n2_mFrzJ8mnNb8r99AosoOlGzJH9916kblLBpj0928Pl0P9oJT_SPOrRr8BloDmgXdJMlwvXt2SYOHlKhi4qOj2scxOkqf9Xc9OQAWuX5AcaGoIkTjzDR5yas.Q_cSiBqjbXihxlIS15mtQ.PY5myc7GEdU8BC6QapI_xc7UfGQrn2ndYIzl5dquVz5By8ymp2KHaQk8hevs7P97T3V0UIO.Ogedpd42necIYi5SzK7ogVGbLGTBi78QMlsYHxFHkSZs8IJb05LiHCOMLtEMAVKsKBrBvWZGwtl83tDSq_oGR9v8nwc55O_dvdnQB_FlEj6GA1rz84YoGioLzRsoi6LA57DMLajuggavNdmHIoYecvd7aBnKjBhCRNrG824e7zK6f2L.xVk_vtMmcapbF2bx22XvNkucucz2sClJ9htZOmwPTX3iMRPaRQROfJTIcmgorsJj9SUahSiZxmmg6S284TEaj3vT532Ps1yOnvm_EUWTAEv5kyk.MjRmLcNCbZ.pFrKjdBq.Xh4nf11w5wFe9Pq2TGGJyHcUyqEU303npEV4qjPZcpwnRSJhsPYuxzEzE.bSv.s0T6l8OVbKLXX2CI1A28HrDeAG4koi4ZZ6WjYH1hNmkNPjqcgRNsXMCV8RlqkpD63WNLOI_Zlnxm_HhX2U2RlU6VYDA_pT_RPLFEwJU6UurxlmUgJmYnvnmG3QDQI3bBRravGS9doM2r9eK.CeYVjqnxRwbpTrds51m.F_D4AofSs.lOdazi49ZN3lj9.sUyPSbCZ0MYOuJDvXAvavaZGRxxNuShcqO.9MODAcceWDJlmNiN8PxYkjhOXL5TiuPHgaQxNwbhpVIUmlzFVcP0zQuqKKJTDhDU_wplwae.wL6XB.FG6iQvSaDXtAHDXwh.lHqWrlpkTMPVwIvMT3SePJhR.qwmnVW4eCmV7LEwEYSewxHLvbBEDVWOMbzRSj6Pguf8jS.MlGRH6bi6Bkw",mdrd: "XXESi0QraPZ.tnV2OLCNcqrqwVnpLWOQZRLbm6ozTcs-1739201703-1.2.1.1-6ryat2VAdSVruXD4wLq6wX1NhqhRfGkXXe9c_J3gTlW_Y5MlTClHecJsoWamIYYxuZJcBPHeYQ26u6n4S8XPEzggqEzK1ALaXAEUBKdKExWgHn9yhOiqygNKg3_vE4Aqm_zdtYVtSzbx0.voQIju_FmQFdfSTQaIRz_JxPtlpBKtl3lTSxDtXhemF4gZ9EoQRgKKb5GOOVJSozf_fo2cDvzgSFwoqDqgc3.4p8aE0pOu9ay5tlKqGr00UXJgym5Pj3TC47VlfPx3rmsbgoNVovzLM.g0ij1WcS4MxzmOPTG.r0TKerL1aU.97gAd8uO5BDpXvGyQiVYhxSPJM.2RhWuu_OY4GLVD2Rt5Zr84G6KpiIT0waQHKJfD9_duCqsYTO7JvavtiaIJQNI17QzJR09JH9JCbx2cifSgvmBgYHMlk8u9.R3lWFl1gvaJaYqMY0HHSintmuKAtSAbe8zplHKyDwhYwP_qHs5bUdwsa7SmwIljPDukp1t_cqMvLagLFhjWYHrMMGJfmuxVxM8jCfV0OqMafqgua90MNTomGxPQnjcoQ9B298zA9tkPhyPjOTuqWfeLUMvXjB95eor8zkwXiV8jKmkCG9ITjDT.2YqgODK2Kz6g4KJb9VLXglLRpNS_07ERXmSbfBzMW7aHTDxYwbH3AAsfLXuUnDuBiB17weFo.l8WmBKqrz1dNe1TD8TCRQ9oqRrMsfDeao0ykMYbOjeZ0LC4sXTWx9S_scMt2.wsKOre02kZ62StrIUsOHw35X1H9qiAxgfAkBGzjbtHiR8FLlgDhwf0FfUZpFe0Mg5obpQMnNM9m04MKfNN.KXYBE6XgJ_gKIHFRpAbBWS7onQYf48H_QxECBazGJbkmIFch7dPvbPGSLHOZUiczbJkxfGz2dFOBmiyP.mlnK0rvItzgMdPkmen.b8863bciktxXbCOKqzd9mv_VPdmbedK1wMdLKngyVV8wLtGPY165OaCQGmEYKnHYUSwRo0Qs417iVwvtytCj6bkWSxe2xmnWbAPrEgL1INswoHQSRFSvklSbTACS9udHyN_iLv4ER7eqRAIDZUVlpnzgkv80OD52bcCVZnFj43ruYQaIFNL.ISsPGMMwan99JfQ.wbz7SVvbzQVTz7w_h7oX0ANtOdvyMvcT271hTod5rE7YbwAHIX_Rv9kvKgtnsgBUldGZzDoqlw2nTyO.YY13fambL8YNSSd_2g8Sok8d_F61xuY6YMkpakxPLin294.vBVpuRE_0fKJ4bREpSDme.dUWccIy6MLdkRafAy06wgiCdDF.JZLxQMrAccin.zOzkVySYcrzZWx1d.Hj6Fb5cX9YQ66X6WLuDVCMSD0mq_dOX9tqpnqHr7J3EjCQCXowt97W9OGIatu6M5dUQNaTKAp_Xb_UfZpP2gcag7dvz3MUt6h9dZS2Y2SuQDmakSpPJdKCiAeZK6DbPHxdgBPSTke2z38mcZSJPB12FKaHblEUmlmn9C9l6Vy4FFax1_jrR9Gf8M_6DbPenj4CQzW2pT9jcNjMVKFbtUMNy_xUVpZ99AauAv55iXpJqItZ_Q97wlZzE.3bw95r0r9ONVZ70kjH2fab0NHKlYBF06amII9rRkvFx8dpy.cDlUx2.gcRr4XsaNkWOxNrfPvU75Ph6wYfLq.vV_B6D83Lei3ijnDaDDdI2KOq3k3FFx0qqYR3EDT7chef.IHgQ_pNAJQJ7LkLMtUIiq8m2yY7G4uvuRI8_hKb6pLQEG272vaWFlbK.DHGUTFF2U1NLd1FdZBp8W396kRTZg9FhJEuKsjLPPPsq.knjZwxgf7s.HIE5P9eWJa.wRifm.vJm.CbFN5KhzLwj29yuo8rGKObFmuNcwJaA"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=90fd2ab68d8be61b';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\/225900401313?__cf_chl_rt_tk=8PpTyW.pvqae8EJ_iLTf7rBnzAkI0_SWogN41F_Z7rg-1739201703-1.0.1.1-8NFWBVg26lHcsyJvDsz6QT9Yi2CPaTGKwBodnZliPgY" + 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