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-4302567981-gov.caltech-edu.pp.ua/post/4107682953

  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-4302567981-gov.caltech-edu.pp.ua",cType: 'managed',cRay: '911048513812d630',cH: 'peK7GfVDi2nNYJd5GVihn_30i8XuK0XHAMN_tx8sDw8-1739402145-1.2.1.1-_QMjiihczsB2ir5NYzTxYwJOdujk7Q28mvQChn1Q1.yHkEd50qg3Ti81qGTAZQfD',cUPMDTk: "\/post\/4107682953?__cf_chl_tk=Xz.bSBkgs.qkplIkik_ZpXQjATlyGeEZkEiGXlV1nsc-1739402145-1.0.1.1-1jMbiqrLwOqHyvpspt0HO9Av6cNaqsXIBurOQ6kgQ7k",cFPWv: 'b',cITimeS: '1739402145',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/post\/4107682953?__cf_chl_f_tk=Xz.bSBkgs.qkplIkik_ZpXQjATlyGeEZkEiGXlV1nsc-1739402145-1.0.1.1-1jMbiqrLwOqHyvpspt0HO9Av6cNaqsXIBurOQ6kgQ7k",md: "ljPkhhEzSQSoTSzsidZGxrwwXuOQ2rZcX1gNvboq45Q-1739402145-1.2.1.1-wMo77I4BxxyKIHWlwxzzRLLNuJYhOW2fYOWIfYxBtXgblaWJa9TE9WhzYLZ7Shq4FAPmpWoUmbdcrEnTRso.NDF6qqzUZAQ4sfRH0s9heiCe5TapFpwk083GDQYRB9Qi7YryazbyFSA4PvOdMg9lwibNuPWRIbUdVvx3IH4dJvu1YdVPJXLyveoA2pWAj4zbOJ1qZT.QB5WBON2oXc6dZkxOaju2q6.PYZmhy4ZqCl5hiws0FZAFcII4XrkcHmLJh.FevOmmbhOy8wsGixAIgzh.ldVtPRW1WZf1oN6oKU1jAp9LxF87eLXgq2Ck_QBM0lHYhNqCDrOYCkg2ELAzOf_2Pc4My28p48t2wiBtZu_M__5PWyneY9B8OX.X8zjOEb_jetnliRkCASZgYI9wvuiLYriKrL2Kw1cB_Y7XIkNVJmO2hmbnjaoo3EJVapsewOUr1U3Uiti0lYBEYCWxTiXDHSCVdlBf.ufVnRDyX8QiB6O1vGditT60B8nu_.ECDEOblCyQtCAtTJ9i.7k2datWeqTfk_Wq40yArb_ts82tp3CfLnckSxBd2ycv7tskrsOxTdTBd1c.JFWlmx8S32kw4f_KqOj1CAqw_h_nb7zZ25WPmTEGJNdr0Yiy.srxSF1zw6J.WUA8018ToN0bX1WaM7lkitdvT4B2PeId6QTgDF2b3jacbedzCYiPcfMI4GlQvKt94KNb5zE4Yc35fMcjqoDGUgzrvXKlNU2z_vYTUOja0DmN.JL_qT7_o79oy1tvi0.GHItZjamIeH5aIef115mG18JKHKkfjFGwgvoH1_Jjcl2IvWKcz4p3OAULn8JdT.rc8v.q8ZBKeSZW8ycv20ucw47RjpP0g.ERMKRjZfmQx73SMNfCGDpRW8VQTQiUvU3VX3Prrq.MuOw56gZ3FLD2YOlxO._MA7hxPZZ4EF8u3Dz0gbL3TX17R0F5x6fqd5kLM2jsTwwyiJvXLZ1xSBdVzPQGsLcI7E2.7TTw_jOrohfw5ZwhnleoksdXJ.9pUtlLNg4eMVW5_GZNKrlu1muW8GFgdcTUbX9lTOmf8rt_wrA0KeMAHf1zBUICFG5uK2W0iTMUd4umFVUF08wcrqCvlPjQm1o3LRVlLYZpGc0UNQIJSAJz4x08nAMRCN0LpCefYJfJzazRhugMmX9A5vP71peCqK4OyUAPyB.lY0bMJOrRcbbC4wy2Fb5v9Bx8d8T9MDfjqKtaITEMjG2y80TWlqh1F6FnyQ8qqY.umaO.Iyyb8ckMxkmWtGED5sv8PonUImFwUT4B0O9_bFyN6QK3adJI9.F9eiBKZr3rkDHAsfnLBpyOXE.v4GApW_TFdstPabjpCDCi5T5wZQdzr9ucarlzBveInGkZSE9UNPYTtg2SHRlc8v1GrY48AAUHtMn9NpJ4dzEMBdJXjoAgOw6uuYInECFBcN0.3eNX6Yk5xvq0SuTaBCpuLLO3HMJTOrdWiG0YInTsEnIMWFNGx.2UOMrG964OObrJzDZo.vwq4x.._w2Us0adtP8J_8UEcn1iWEWdoFiZaWxNcz1sXzD5MV9FAqVaAir9rE6BcHKwMaNCeRLYU9stlbvwO_wM0xwdvuJZ8Ym8V5zokfVH9hcHPEOB4jxlimzjRbp9uSTT6XC7stl267A6zt8OuakW4.K9wUDjVWL6gfTzHzE8eFo6SsUwtyXzgFjeYBW.TVnLtyTvR2fjaDhANISMdWMnl4WgMdMrLZLEJ6kfCnCHqWTsA5lW7lQR0JaXpk9AatARSNyEPmnmLQx7ucNclrdU3eAQOn2ixi8oP9wPEcrZagiCjzngHnzttfix4qM7iuIrVyTuIS84cI4ktX6iUcwQTBWFybocSMDuNJLrCW2CTBFuijB5hb44d_r_u5SM4I_gQwO3Hx8QKMLDcAfcGHHWYYHnxAPy5TJUW5bcV28Z2xL1GsM2EnzVcCb.bwSh4CqJAUu2VHwPo5gCWAh..cdrnpLdilnr5QHxSzYZRidUzQqexnYEmlGXTYm5eMtAihzP1GPNUp2AIRgaoZPbHkc1_eKZGNyH15nufaTfSH8AhgzPfGjKPEpiAH6lDJNGlQa81yj9bkNPsnCl_u_v5BA.gtQs9DTypGCKpGAbqNVBDRx1XgNsh8BctHw9EbUyuNh4AVceyFUHmtl75fd.C2CHcMqjJHw.Oy8K8gMxQZM_Zd.MKrbW116KMXGsOgfCKg60j7MOj7DXAUYtvq2P4x_1Pu_sXgHd_ske2ccCsQ",mdrd: "p.gvnDO0B1LjdpldFzR7lfHc0TztHBGOJlIWMC_lA68-1739402145-1.2.1.1-6SOJ60e2mt.CuhPhB.ouRgSbtufjCFETS_Qo46.a88eqZtrUbdxhKuELiqmlTixzBsd9hv0OorPNkqxQ4sWs_3tFHGx79CPKRoAffPA756g.bC6cngHxXtEjfubnGQjS0OdDAv_X8XvmKoOnsmaOPXZX.pumofmZQVMTzgGRqNDyt3Cff3pcBCDEyUo8NepKmbp3Uv5uUtJeAq2pQPBpH41fXbRZMneIiZTGpPn0sGZsSb6lh3yTZ6PMVuWuWAOt0jL9oOnw0dxDBvFZt7elROal4Q0mD17XaI6hfkcSoGcdSHP2uoktBe18SEkK3VMtc1ks.xIwlO5tU7Y_G4_Q7g5WVzS0wMXQfm77UmzBcA.0OpzF4Y.cSlAHxP5b6WHEnSLb6aEclbqCSZABt6t8uaVbKdY1v2ouI.n9JzjOGsvNasxtkQo0mXoQgpFKTiyr_57pDfx7AyY4Z2PtuKDhP1_r9vVm8KtOjA05vzMCx8KH1MnLMnoiF7AZtUgvlWQvUkBq8vIhSPDr._9Rv6QlpLR22Z1_2VavVMAY2Jg3qnvyNzh9E887NSG4ZP.pNWHCZ_SMg6_m512dNu98YkjaWrro7OrZWFzw13Gk4ZAJoOBsP92OvXPJm6ViGj2ux7DVM9Az.R2JhTaArCCcG47A0tOvIUSJ4cF.SxeVuIOiin.XQS7EPNKE06S5x9Jo6XRp286PF4X2sHUb1Z5YYD8nT32exPHCrA3Cxsb8z9EGDb08dP__saWXXoEaaJj4Bj2ByATm_lLqFiwK8JWpsDK0P7J5NOmcRtH3ifAbj5raJxWvi3FQKPSzseNMEarZxEZkFwUwlkd6NGhTrnKZW1sQI0sOOcupp4xIDcsUBK8qMrMf5g_LrrbsHW84JXUmD5ZSsph.f6qiGbqU3578_W9XMj1zsslnDFOwv9n4W6pL1CVdgBD3GevlMygzKMBiNo7fabzsktgs4a_U5h266H_Nrx1FLpmgzuIsFiMo2OV_ucETAT6FLoy7BlglPmKkAZf__7V1LAQFMbUJYavT4bs9Y_POST_J6rI_oRYSsDX7n4cHKP_lMZYTzs8o.jeRAbH_em5iB9zklWPhImiovauKs8Rh_rwMi1rkhTSgJJLCo8OVemMtwJlgs6cBn_DHy0a_IGpbUHt5RJiBf.ti0BREsqRbheQAJNZSz.G8ACKi_4wClWtFetT4NrmopIEWTN5viGDrmMWxNFITYpawimUpBGXckyD3Ig1r5IhlmxSKk9C68HUz55.G2yb4w4LgEt4U5P1NF8nQei2GNIhsDMtQ0_jcCYZ6oC_Djy9NPod14H0XndgDNYxzgKg8Kl8dIGna2NoJx6PaImLnn_Sfm8ZwaL3zHPGHRd0QXivAK4maQXT5Lu38ze0iSwZFch3CzTmH.q4X6g2qLfWDZqIb9fFA9N98xr0SK_0LzHEkuNzaa5lhmbWbE64jZnBBshWxOIeyYHygJp.pMOKHajhZ5NijB2hxo8fn3vImmGoAxBdxz2.80RceaY8GX2FwgvOSD6bCmDBsAoGg39VhcCx1b02ZVOG04SejT.FlM_sbnUF5661oyXEUklILQD9EfcjcD0OD89GTZ6P_w3xz1VRirv9HLeAaCHZu0bNFxkwY09HZaz0PJYZzd1veEAMVA8dg69uE0y4ETeLMBS9AiJ8Ryu8Fq6hF3pB9LluGm.DdezR0VVK_AAVUiC932cmPez8x.BFx5MrxWrfWLL38QYpcEZoqXyR1ezBg1B8_gCS2cOUK4TqWLMsSvNvJe.JpS2NjVEdfFFJGKzvyzI5TBybBCMIwi69X28FleZyJtCPaqPZANtARdzUN_s8AzfHVqqtJr2Fy"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/b/orchestrate/chl_page/v1?ray=911048513812d630';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\/4107682953?__cf_chl_rt_tk=Xz.bSBkgs.qkplIkik_ZpXQjATlyGeEZkEiGXlV1nsc-1739402145-1.0.1.1-1jMbiqrLwOqHyvpspt0HO9Av6cNaqsXIBurOQ6kgQ7k" + 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