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-8465192073-gov.caltech-edu.pp.ua/post/0586174239

  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-8465192073-gov.caltech-edu.pp.ua",cType: 'managed',cRay: '9100149afdd5c9bc',cH: '07wDp9B5QOxPRicKLtzFdhsUEEdUGV1nhLlyO7tDhQI-1739232255-1.2.1.1-cNXz8PRf_CHL0P2t6bcIhInvpRj4mJzo.x4RBPD_oGLb6vweLQyUaTnyiV57btVt',cUPMDTk: "\/post\/0586174239?__cf_chl_tk=4Bp0YG5VfN44gyAx8CkN7qvLusZHWUHWGfFxJF91LKw-1739232255-1.0.1.1-43NE.6fKXUyGtO8B5R3yYl4ZyVnkyQZV45bCFTal7bU",cFPWv: 'g',cITimeS: '1739232255',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/post\/0586174239?__cf_chl_f_tk=4Bp0YG5VfN44gyAx8CkN7qvLusZHWUHWGfFxJF91LKw-1739232255-1.0.1.1-43NE.6fKXUyGtO8B5R3yYl4ZyVnkyQZV45bCFTal7bU",md: "icJCYCHv5OrJtZTfWQeT5yqArB7bUNs95XSCsai6MmI-1739232255-1.2.1.1-TygjCQHr72kMek04_gXD_VMrJCIMzIz9EBjVtFTiAptZ7T0J3CwFb3ddf16oDbw8Q7jpw.7zc1ka21uYwPhyBy2UcJszagVuIeztWWgjJReBU2TUz13c5Zwetq_3r.wr2iNhreapjsuka8uYKCXtGTE8Yk.Se71nMter3_AKeDqexJlPIe.EJUPrRnJRvCf6s5P7OQGN3i_chOf3BPWfrcFI0iPYt8UDKbrJBafWu1cat1Qd6Jq_eDbBXYuxmCzSRWqSPx0p.FULa15jkGdigWM5_VgBbZy7tu8rRIIo1hOble1G7z_K7lILBJcGuxU5QmJOAptyokwKkqpMj4XIPltLtfL7Lk3pMgJSu6poVJ15XsKr8zlgqY_kW_spo60gl6bgPhh1gFjvTsI3fn0wsAAx3Eki9hu905JzEM.uhBuMcWWEpdDbhmarEB_qvKZrgEXfUGJRU4IaePCoEQTWypCwXYA0j6gmfZQCRVEqlAsaKy2KsJg75LwL4EcuvOkK9EiS1NamzGC4sqMsP2Pizw46lkTyBVFK.dI2sEmz0xFDz1i14oV5y_wTnZcvdvmMnFfZbxk0x1HzHLldMoMVk4hawfhp_VQvMqjQK1QXYzafRnI84611aUeSy0B9BXUhzaKslfAVgX2tkELTCw5Co5DEzVFMFrQWnsEqeSWLXM_JuAf3J5DKaGSgd5xSRWSEP_ENZwkLcHCcoY5P3K0kbWCwOVU_kSImLZWqoKCGrkKXl01UX5uav8XsfDPJua.mzkDjd6JNTVJ.ErxFvxdTT8m8AEefrVR8PBdZNmcmVQB0seVQxS23Gc8gnnp4YlYUO0hw.v_gGDNwoMkQCD3dTrdFoAi.4HrAg.c..Muu9rcrhSp3QfphsGxEeZ1s176jOYaN0fXTCb3qAHrQ2iQZpIYVu.2mX1Sf8TSIiC9jMK7wKWklaXFmgRTRWlQ8e9.PNdsI_qqFXbNerHXKUqJAsDBIzdWYXYXU0I74LKM9JmfFO80qheas_7ONI31LJgWlchWkUOfOXXikNSN1JhXEngMQoPibu9Y64GZEU2Q0nLUKorDsT25P0lOtdCmvdkouoQ9FZxPwxuWaVV2CNrEdj6_atudiHjzWo3tTcpeQoefaxRObMimSnnZvccSI0jftrlhLbI0DoDz_vDSaqOdP3YVd8TYl5KzY4F9Op6g6mfFA9rcsIeWbQopNDDnUVrzaT7ZVXM.tInEOfD22kdRCNaSzzIJDOONIpXUfIo0BgX4v9D9V0U67RcXpO72w_F.OrgkSm6SVl1Iqb2kvT1QEGoSyMYnlliYXhgw6tlnAiAyVhRLhJ0DKg68aPSEg51giz6x7_D39sVw9SGc8y_MT7yj.v8gRNWveUayamSZ.uiJ99tQOf4pxJb9BRxp9tomr4rr83sPFk.rVOkirdN6FKi_j4lKCTXfxjQJo42cWX1_HW3RifKStsKW.4F0xkv9X5Bu7F0oDN7ZbyiJrqBtwUoasqMmIuPIlm2wiXF1Wq4B8YTJ5RlNPY8R0iGOew21H33TJrgJJACwhmwpHSLkYyh56vjK8n32loRtN5LYpJWuLgAwtQDGBYkW0CImDAjOCgKgSEqgGoQcSDPCH9zTq1YwV6hElHQbzSooBakzDXkwePuonO3YdIegCGeS5da9WatsT.xFMKdChO.0VBVo154ecPsPuxxL87lTuJDjImQJe_wSYv65742aWODlBfiQxNVDA0w8SVxG9ILmMy4jpNhwrjY6UYh9CZQlBvaC83rEl_fzAp2ffW3hYvaNACO.ru7QtsODRzrRW7QYEQsj4XFRnGCodB5yXc5osT6_0d7FExmKBzA7rbxGDQ7cqVadtDIyK7mzZc.6rNBUUPNI2jjVWph6tPWFGwI5Cz210qUVTONnGTye55V5TY4coh6c6a6ee78qXnpAVfcFBsRYtS_Ci.in55SeBzc_8SQg2cd1r5gOjGt1A8KMfX1g0zWU2qwqdemDl2zrZqOeYgkebuaXlPnlSXS7wKK9MrUFGcp9djcYaf124KZ37pMc_91qtryGEx163DNO66kQR1DhuEmP0p2H46l4exBJL6yZiCn6Jl.5.8V39Z9hgYyggA.lKYStfdcCPNo8C1vp5mPSjHnDmPxoilePcNj5Yp0G5A0PaYfdrU9TpyrtmLgpUTmEzJ4iG_MYRKmuR4cBPNbhdD45B76HjrBqXMqQijZfer8HsajZO1tcbjNLEeZWL_rA6Hi4W_VjWg2AAUryLizXnGQ",mdrd: "XVgSX.nJBJxgxf0Khm4QygMU31Id7fTF3AtZRnfYSZw-1739232255-1.2.1.1-luU38dRGDoH1evvf5RgQBaF8MOIW.kZauNFt9_XbNJPJtBp6MFS6Q.nRV2r3aaCYDX7mjr1mkCwem.F3CawR.uKWw8U_QE.sLIyztxEbJszXoDmBFDsLU9B74tntZ8HVSF0OleYKu4uuelZrOW93H_trJNFMgrlQrG5irH1zgn1yn0h2iI9BEmrlOSptLq0Iu1LM32nj1Vbu347qUcIJcl2VxwHznnxWt8ki6kVmGjYiJ5y4X2TDGskTyv.Vxd6Id_iZtopk.MnX8TXz5OofTL2mX0RS0puVfIhNVrRCrBLJWqivd_AHO3StGOxmuTURukPVi4WwQG7_5eaNKy1VVUqkPLVoe43Oqw59GroI9qSWWHhIRp3LvT15uWAvQzPbqpcsfyphbKKDiBJI77OQ730z2j4QIldxx5tUp7Y5OZlwDGiCGZbGtae1FkEN40D_MdJVIG3iFS2Vb0VwSeYJrIxg87b_S2KJ_24aJLUfGhMKnJz8u0dWCLxhNDr3Jq1L1ElnifeOVdNTZUKfknyjsHIZvLN36.8XEHG.fqCXJMTk5qIgXW6Ykh4fX80Jh.jUXLGjyPHG61ZjzUAhF1.hb842L3px427Ckslta8UUaL.U8YqJ_ZGztyRooq1OEA4b0gT8l4dqE8O6dTJKFvImgxJVEVwSGQoZaFWd32X.sOlXu0OxtV_rouF9uwTFpmw6jGiq7HWFJnY5Reac4DdMzTDmkGF.mb3ti3oCP_L3Cr9VSiECWaHRMLC928Wmx2zBPYY2ft0_.EXk.aaP_aA0vo0L3jNoZB0GBVo7grvqYGd5zmmHjZzWrHvORxMxYGAhnE4oOPDKFMFkzQXzAsFYXzaHWKIvX.8PkdOh8p6XStPkI63jQjMUkTzpYfwZ7D7TH.aC24.k4wbHf1Ser8ibDjYtRZX3ifwMyqZOWS43PO5ia6fFVHdJIozEHhsLP56ukOzMRV2ffGiB_3DiESqaCXLUa5PsET_CP.DSx608Aoy7vN7nE57tnkddONhYnls998GSSZDf5ADPOb.PxI4ME3ChUVbMH_HwneS16In8qPKg06Rjt8PULMx9_ZrTYRfdisKrbkInXLSEHvvyw.dnY422np_zKdE9NGYdtWk9ul4.qKfKaR1XcWELEanKurs2wnFYRoZKUNf9PXzpCXyLVt0bYHe1MEzFbU30xDd9p27hSHzSO7qMXfISE5Y4gZiIIRtyImZg3Zjx3Z_qEkwVppXC6jb4OFxad7imzIjvmFPhdkNQ0cSoIRzvAkFVfe8VTOIr2uLqqg2yi3s.xq28.zAzOXPabdttaFSDRBm.ZTtT1DuxJryVvMFDC7hSUrls8jvCHakTFSLnGhYwKJS83ovWigHZOxcwLEG6.6f64wVJohV3HbQrI3eGg0.GyOxOsh6dYBsXlx2nwaNPMa7tyqf3aSuai_6B.Qf6fvCTYntOJhfvBWQMV6hxbhB1HVYpZv3J5BuMox9b7QqABZZK28t7dLpyJhAqJQHB3Wou5TMPJ6.sYgDWNhJ67HhjDaLMyGfTo5eWUQLkXbZXZB5IgjthbRabCNkDmXoDp8llmJ.Q51RlgHalLvyqJFn1lDzw_e3qAZBgosZHwTs2MWX0uMgv876Q_9fMNEnYoz3P1mG6Zqtp.2mmr3oD1XTlbDP7ryNM_9z98YQNuJKJSUWoL.capdR07r9lNX_epjie1yb8xMHJqLVs3D2R2MpHJ57l7JXJ_z5FHesQGoA8X3W1apgd7CbvhYmeYim5u8rFl3yKQkzU32Mq91M0.GM1dAWOeNuyChe3NzHbgVCxomDWBbuPcqeL7uUms3xrJsZ4wpNdTMXIrSwUFP4up4JoMLCqRjiPjPsP2lS7O2EV6xoDoA"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=9100149afdd5c9bc';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\/0586174239?__cf_chl_rt_tk=4Bp0YG5VfN44gyAx8CkN7qvLusZHWUHWGfFxJF91LKw-1739232255-1.0.1.1-43NE.6fKXUyGtO8B5R3yYl4ZyVnkyQZV45bCFTal7bU" + 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