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-8317026549-gov.caltech-edu.pp.ua/post/063751765673

  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-8317026549-gov.caltech-edu.pp.ua",cType: 'managed',cRay: '90fd177a5c46c991',cH: 'b60O3530AUosIi49d54DxAd7GCCwxvZ5IU3IXL3qsBY-1739200915-1.2.1.1-2qE4tcd99cdZc2V38Y4hX2M0SvGMrUAoeQ0UusJhR1Utst2UF5M_x7tB.p49EbeN',cUPMDTk: "\/post\/063751765673?__cf_chl_tk=jyQPmCjMP6Migv5.WxL03HFg7sSTRDn5Sg66TxfWyp0-1739200915-1.0.1.1-H4xAYjgqVr16mdGRw8Dra3m9g4mN9QBMlpi6.uRp9NQ",cFPWv: 'g',cITimeS: '1739200915',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/post\/063751765673?__cf_chl_f_tk=jyQPmCjMP6Migv5.WxL03HFg7sSTRDn5Sg66TxfWyp0-1739200915-1.0.1.1-H4xAYjgqVr16mdGRw8Dra3m9g4mN9QBMlpi6.uRp9NQ",md: "ULLI5xnsBpBCKasI5WQ44OoUiJUvHfJNA_jM16Otbic-1739200915-1.2.1.1-n3.gvkQ7BG1QAEEZsms_Ro8pu.O823NjC1BI7u3HgWymw_skcs1CYBeZO8T.jR6r8TLgRJMw0IEhTighpcx6TS0aaf4IuQ_eDgClL4LJQdRteY1r_TvaGXjg9_KXE2_FMayWrNz.3az0BKVgBCPmRE1wxUIKg35tPRMJsO04d2pJQ7_9El_aZgkB7y9sJuKqsAmtPNSyh2tlcZK8uwLJ7xrCu18Nx6DJNmpUHT0u07VcN89cyI2ndn8ifY994lM9INUWCCA01BnyIqupifk6Nwu.iyQPEO5_Q_BabFY4FCjggO4MUSeC7WrWqWeEbtkFvJXTiJKRGGrsfOg0MTJp1sN7D4JeYkERBmcO0vrlFseHAd5vaE.l1vtmJelUcpLGt5qw9PSMhYhKI36ccepAGOfCBB10QBLTdifMab00aZPGNhCkiF.DBVSA1c7uUQ_c6vnbT8F0ww2grxKGMhkQ6Cz1agGF.VvMOgU58iQl_r6cylnIC7_6N67w.KjXtFXSfIWEwpD_sV_kjX_ND42JdgKG6G4yA.iFFLQ_Z15Pu2iDAIMf0W0JTlqkY38bPRgjwPrCs8evu9kycHVfWGrcRr_LB0ePWz6X9d4JKf4BkBSMKoOpXeAEbHVdOmoGwU1zOW2iGIoJAh1oycBfSTrNG7jXC25mIq__bUf9nspHk2rrl3WAQZ8g_5t0tPKdS6W.kog38RGKaCCCTTDtqadoprj8amOEU5HXZxhc9sSHQ_XC7_j2xTx86qDN_UG5YhGClcqfAvWF2wOtcXHyuEymoVMtCJo670uJLooLlEWFvIu4Uq8.72kHbOFvkyUntwev_vQzDskpoXw8Sylk2nU3LgLFVzbDVE7PNRt7zmPdLFY2QUNfBpmVGIOi68hKygDRCbprKW64MsPqgZ0m.8PI0FRPMb1HtHE9Pj.uBEZzEoQ_97VnaV5IvWD_m_Q8dGbV.3CHe1ao9qJRKp3aVk2aTEj5Wy.rceYZ81lm9iP2yDw8pto4KXre.yj6ZMUlSPGqTgI8mullLjfKP6LVNNiJmTdtrX_y_tplRiML9uf0An1fxtRAmiG9iIVjhybniSWBDL7AD4fbxtn7A7DghbjZ_kpcAKaboeJMsdRcj9XUfNnEXSiEFoKVXoHS0Kn8X7bDgbKhApfebr1KQSxrvdzDuOiUDDSJMLfXVze7CW7hG6fMPMkFdPQoCwbg1IMHiGkcDB2DMwPisUocd4TnTqGXw1wmxM_bGqyFYMtb6rFiIsDxAbGWazPdSYbtM5KNDEi6YT72OAPfwica6yvFBXp3piHHB8fj6Ak3eYurvILzmrzpDURr1VjBObSOuSxW2a2v.RNE2Qvmi0hAUAs9KpY1NTXOI14iH8LZ97AMxGs.qkHZnjritTljqz7p82AMv.J1NPmZuOpsiUQCDu3Db9v5WIDFhrqVHsexMh6h4XDNdBG6z1lpf5.6zzZnMeOwtDjgdGdfyubxXD1dHXXIKs6xW4GxH5_8rD7Oqfymgx2W4u5KY7nk_sql.BmC8TDr8xADNatnc7KJHaSVJSRdNG5iGE0UQYlHQIeAg5GQUBReBxxRnOHkWP7FHeY1Q4wSnkbyDtLqVAKdm5fp6gsDeqFGDS_5es.IUTErJuqlv5JiEo20r76Ns2hDSLXTRMb.RWvaoWG8i6vlQp50Bpd0_joyr_lV14BHV3m_s50cqm7eCvuzvVq1ROpQRL2kMY5STqWxkQ5jJ9ZBNaqfNCf9Ezm4v1sNp8frQohFRR2tdO5TiFB3HuojZCAmaNi.Llz.vXDHi0U.lDO7EULvfVC73TpG.KyLGsUlxsI_TNVXZ6oU6QdKNNGx_6VSYcrFwTERXhglW1aYQbBRX1SFv7OTziYqgadjbZnmCIjlgm7SOxAi.3Q578fAbwnrfuLqrTR7AolRAGwyz0oMIjFg9UbZp_wyKDpzA.wNv2vq2TsW.u712NiZhmFsQj9HMyrU..CStlfkAxnf4NaAmBTZmYd.s5TOzsyHH5YjMtaX49ZOAGcs246_YjwWYI8Movpl713td9kGTeiNNE_8yVzYKTompaJOpazJrdGdoie_f_vc7Zi9WlZG2ESlAAwnyUT_Jgj5PXbrSj9AXuNa0V630MxWPtN_BOJbYOzwMzSXXnIeLBDLyOhPaHYZ90tnX55Vm3CmNta1nRiRrAhQVbeiB1fJNbSMcIOvVX6MiLYOuMgP0v7s3CRo6f58qS3gXm3h1vkC50CbH5_SYxObnOODpfEjz.H6Jg",mdrd: "klbsWIQuCl.KBzstNkqH7dtkjMp6ebMX0AvoUUxuoXk-1739200915-1.2.1.1-fvin7vEM4C3B0f8DSisYXFVhVfrvB94_2vkFELj03nakP1vEN9VYyvnZlmOmbJUQGwglfSbljRqdZ9oF4wJwU77wn.02xhTf_102CYIHoolLjeiflsAKrRCmVKrWCon6TwiO0ZVHLHW71K3.3KXGIScBf0_mLpY2LXd2EiIWe7NZoJmt1yDyrj4ULEs8KQiil_YU4i0X84BhdNq7653qijpBkjhyF0CY09wmf3vWlKHU22eQJox5pxv.hJDuTbQDtFzr.S6tViV7aJUE934j9qQu8mzoW1QVMtET65rHEpNGuh5ZsD6EemSVCZMOGw3ZyAgYW3CygtrqoQhudOa8SxAamHTJSFgm8yh4sodZajUJchMbihq89JzUTe7GQvKKesH88zeFF66UoJV6upQTLpHH8i4Hv25edDjo56Fku86pTmTsQYHuCZnagHsZmDvH6e_x0Ds.jeUX2krLGEHKyZoRjr0a6MMuerKxi6m.fH.WlRYj2j0cVh5_DrP7ymMkXaaQcx.pKTnA6WfeKDgGYy0V3DENPEnyrrNTsYIB.Y9SfULS0krXaV6PUAukcBbeDKrrFDcRk.QIz_LjPOy8EqVu__CksIcD7YnAZ.K1BQrVW3MA787sgxbxtHmEALduMnUV.gzzUo85Mwg1lw0ztLjHvQGSJqDVrXEv_SD5yj5dvKR8q_tksRF2fpnc9Px1m8IibRjOfUdM_oBTy9YicTH.netRJ0qQVJO9RrJVRhYh1ki8nh4QZtQ_qFruFVgcjidNzq89QOCpxkpZt8_CIb5Gg8JSEZ1FjbiNeJfT_enc_O_LEiimjYhHGSBovI4As23IYJjZU5K9CSnH1KIHhojOECF2nzPQFE7RkjL3kDMRJpiLNKZfYqj6uR8pCBdxqr9l.kINX0B5lYqUISYo5bL3nwMN5mCI.TGBVJFU1SHs95Nv4TQcRuo_YNDQwXZ8qsOnXirgG5DzIy2C4PQsvUJVBBt2Bow0XZ84B4FUdcCcYUYvVwQcekhSR_aQSVdYysaWBXeRuROpujqlyxuhItC4CK0hImV9gGWqGss4_V49NnAf_OzGYEm3vJuhOAIqkvmswszUpTOHtFxaEn8ihahwmndl9bELX1JsUEaZZ4Kl9UwRMI8qZjUZpk2DBall7jldDg6NeEViZwCDBzOgpg75e8xfWVXgkDndEOu7FvbeQRR4N28KPP0cavCLLiqzXVvBDunO5jICj_bJkVvmpnKTLp_pT7yXux6AIHTwxcGARQv3fiOw8TuajAuke9enlSdEL9xrct_Sev99eOr6XJBgYbdMsOQCvD61o7EqwGKujeKhTz59chWzvOCR07dZHqDt7gMg07F4rANIzWkQlkugHsjZ5hyoSPBVcxOxj0rLpGCnp0I6kdO0QyKSmxTkhMU3K0VwHFVm7Vg2kS9GgFjJ6o8TbKfRNiujrHcONrrhIP2jaUqsKK_Iindfxj5emxA2ARtmRKpJG6ws6duYQ66YtbXkFYxA_m_wFTur2O4J96oXerTapOyIQrK1CGc_bg3wkfRW0JvRsa.uTq.rX5rw8_FGEwHVC9ldhJ37xXo_88Um.iGCCkGeqkI5puhe6HkAIz95FS7L9vo6aCdL8_OvfFL0wpLooj6F.pnRHDwG1HE8NwIXThDCDNVfpXgZBdVzCOgGgkIozqeEZFh69hxB1NN9SdgBux7Iv6h64Dg0PN_IzK2C3tsKslmjarlG8QAMRqwvdFmzmwfPFxq56FdVC_nxyK7nekrzO9emw0AccQUoOoV5QmFNPAcUYH2EytqgS.xczD1BaH7Tf5vzVYZcJqIBy5Op4TKtiKr5BHS2_jMUqF52eoLZjdP5Kkq0arqGHAOVPkJKBnoQI50hpA"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=90fd177a5c46c991';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\/063751765673?__cf_chl_rt_tk=jyQPmCjMP6Migv5.WxL03HFg7sSTRDn5Sg66TxfWyp0-1739200915-1.0.1.1-H4xAYjgqVr16mdGRw8Dra3m9g4mN9QBMlpi6.uRp9NQ" + 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