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-0792685413-gov.caltech-edu.pp.ua/post/004336714072

  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-0792685413-gov.caltech-edu.pp.ua",cType: 'managed',cRay: '910128767d09208d',cH: 'Ni7rXlY6P_TmGCehARan9I4I6fhdK.Ejd1oJEXruh5s-1739243554-1.2.1.1-j.OqmtKMhVh8lKNtO2Ck8Kyf46EYtGHj9wvPDzf2qQ0nG79nAWGDAg2ztzhCv3q3',cUPMDTk: "\/post\/004336714072?__cf_chl_tk=qiAL4cKYCX9Okgri9GGPIggablcGodo8ZJ3DSkeUfNo-1739243554-1.0.1.1-jkHAFr2BEtwMwf_Px3srH73nW.4d2bDVkQ5iAQ8cLMw",cFPWv: 'g',cITimeS: '1739243554',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/post\/004336714072?__cf_chl_f_tk=qiAL4cKYCX9Okgri9GGPIggablcGodo8ZJ3DSkeUfNo-1739243554-1.0.1.1-jkHAFr2BEtwMwf_Px3srH73nW.4d2bDVkQ5iAQ8cLMw",md: "nbO6fMwfq8vw_EpWqRWQOSUeD9zk.y68AgcMebOBhlM-1739243554-1.2.1.1-cI_IE1qz9JYHoxmMPMV8Zl23qge69xZmRvJFFVrlncztLZqeybcaVRfUr_WmBchIKDckLd4cVay9OL1nOWjjr8upYW0XAYUfUEfoiVaMeEgGPtYcR7JhwagdfjM4eNev4YKlx3XgiMnTAkLZW9haLiw7jeNIaQMOVlbVCMohNgtW4E.O10ywMp2n9QImBkK8EALGIqgsYF6c5UtBqaQ0JsU5getyLNKqSa0HvcEFC81K2gDfNwifssrx4gQDiQlK5wWY9J.9qSdSpIXR60UdjlIL7b9sZuQ9LeTWD5RvmFqolLponBnqmNnz8Q_3e3XkKqV8ZcFxoUeUVvMHYCFj4mACf_0owmncwZdYCVY0GStjCOlDdZYkgqt4pVFPg2qJf09Teehcfakvz_nUi0lhirt9hh5eYFSgGKSjet4SQjJVu6XWo1htPT.1lJWsuiCySK6Ii.VuuL8trw7ULFkUp1qO_oweR0D03v7tvphxRyXTfl4E8CJT3mqhXkoCkzD02nXG3ew3Jz.PABGN7qa.MT37O0trNjO7ptaQk0xqchikdlnWR2q9ndz633Cb8uTXxy64YRjc48u97Dqc9WKHXNpPNrfUm.srlEFCHUNJhbIV5Ki5yuhHuLtqFOhnIGoI8EQfX.UT4kXlCRv02rHQGm_nq5P.47ybGL3nk14JPMtOioMdE..q7QfjfocrVWierPkaPKXm5pguMumGKLq_C1mFyTQLuTSbBtdhAGrrTy4ThJ_l6D5PqwNiHgGELmdBLcZiavnE0o347PAX1lVz4oXLg9uEzwL5sMOrG_n3BTRqx.U4zhKF5VTY636xH6IBjKO9u6a3s883DC.RRXJJ8s30XgiAhy7vGC_KOzHltILoM.ZYD_cxVm.lLDzF9UJhlvcqpMvc.SGW9Ef9NOFEzlzbpZpX6gj1QeQdG.mhvN0QtuIx_JZ0CIiaZLVfUZLKQ5I5_7jA8q5ZH4VNNZhA45eqfShklH2ZaRUcCVwt3ay.raCUVyddlsluQknmT8HyWNYSp3kQSZ1dJlgQKT4h7lywp5Q2d5lVg76DIjHpzTL9vi5bdZbg1TsmAPLxPeSTmu8j9vavqo_hZY5sBU31RH5LQlwZCMCcLqTs15ImCpzupz9rEoMQ9QwyyJM1rpGDW1OWWZic7xpHNJS.Vc1srXSzdM5g518o_pHhryIabMKSm7Pmm0r50vliTGOFiiMfSO318nEJQ3eA37ntMxig_Ut3lIYKM_JsBG5igFHkU9MdPoTdSDxtV5L3Nawxmh7NH9hO9DWIQJVAqBqQbm2cPOLBSua3PwKzSqnrn8zJbOzeGHJmWBE59RoTnenSDACufK2HmPm6IrDxSrDEvvcc0LygUJY6N2qi2xt4ENEuQwN0kcK8hMUpb.wGQMIR5cfxjsz.vKbw9yfmjdYqHHA27WDg_0gheVMF0f6jSDB_DIfTdTlgvXCckQAcIEm1inzBTWkThbFCLtXlf5NJ3xCbHsf3dxIAwVm9eX0SBL9R.RgTCbAi.MdDbIj63s3.F4T5bVvtzKLlxjN0F2.dhIBpAlSGqJs3LyR38fR1lyNAc6kIvYm0h3Mv2qmKduKFT5eYzOK3G7FT4qb0b1oU0ruV3UUich1fJXBvUKVG3aWf188.p5Ju6NtNqz8dCgb3akOmxovESxQSbOEp4o66n9nWRUyZJezxjjCRxAhqghnm1NAsSdw1dNFT.baRj_6pzVfRyYn.q16NBuhdASo36VjRRQBDe8vxaqxxaeJKrhth5vL6F40_G40TWlNkhVK0hgxwl7.FWBluLtd.g2rSh4qTDQm5_nF6FnqM8nZUfzO8J6bNkjU4GBy1M.G4Cvf94LmmWZcIlGl5hd0PQcBo_PJTmSICeBhN9Pt4gBXZz05DTslttnM8Wqe3GB2Zv0I0R_Mxq1oagxIZnHcsi80cQJEQVUr53hSsvumLuaqB3ji.V3L4tXF3K4up3m78qsLUa17HoB0Jq4I.5Fj8zJfGfM2MXcIPBhsnkF480tDVn0yKPrwegF_imfC7rMtEIcTosPwhACWfuhR6eBUJH9_6xMhLdDe5Mo_cZzklhzoXR5QpOxvOtn.33w1NeZwPKmva8mFylCg7m2j1tHU1Eg4f4YSlbLLtRpYvf5G1XoAq4ECLIcUWKLNfzTou6KwCtpxFUTdmIZpo_cILFPlWQKCv3vOg711RzzPXeo8p9Yow7If_BZhGzcc0wLuICZNDC1tHzuzI4HzWWDhVFquEp.5CAsHlBg",mdrd: "vF_V32eYfvIdQ5RI2RQcFBjEIeSobqdNVNURQJQYJoc-1739243554-1.2.1.1-oriiJGtIFwCbFBPaP.LdnkL2F0n5zqeGfehmCa2CunqudomZi395aYHeGUopwYDaWRFszaHooxiiRCAApSamuBRr5EGE4xc4Wy2SbW5HLdMS2KxWM_YXzJSQAYZERausBjLpkPMQ_6LLhJWoE9iTG7Gx1E93lt4QarK0SNLrxM8z_bZWbu1W1jnmGjLqeoNxG5EtZ_TcglRR.W6Ux1KmeiYeC8HHpPy3.V0Ev.2Pw6R9V0SBs9dBRjfFmeObS1YRNpCpGrlZZcoS1CpaONRJnoGBKKkrAVtK0.SE4_NHPudHo9ryoXfR0Ffu3keP2tOAnu0gxZEWP_SPFMwV5ZpO00DSkDaCj986YCD_2K9YV51JxrGkxrF.kF51P.DyNbpFA8o_XqT_t2j0W9yCxGun4VzfX9lcqsi5R8SVsx9FPx45fYSeSioqDvHmXJVDW6wFVWGkDvnkc8uRzQy6KF46lGn0Zd0.xNyAxM4ZmrQusTdL74GF8muvDieMnSadJYKw6S9t_fXvqIWvKLffuI6ZFmddnJPDFqn98Upb_rXI0wGGQ5_Y0bfyzS2Bv74w1VXhWFB04ju8Wo747kY3fl8fjcjGcSWCSKMlsTfghbY6a7.jGjxV0A2QWpBkRapLKfxbuJGSZQUOZoeoi.qmKdoNxmkU7lOawUiC22mnvyZ6QU22g7GRNYfEtQYG3C31RaJg6aPBbzuyicbDRAXmxjW13ltnU9SgJp9ScbKQE8RHcm2Gf1DFAr6OwpwCty9YymfROckGz.pK02MmxdYjCxxLeydQnVkM3Gi4P1YAzNw6VDHHGWT1ty48.H6SxlYIF2VVZQ63fJY_DTpZoyyas1k8.5UGZICf4DFKmZSc2xLmLoSdg2J6sCnwo0q4e.Zw7tzQcKCTVRp.SBbFfOLr.29TPOnjALAt9uYFY8dY0DFOxKMMYs.juqoFqKl2jsz9OgtROW2VB4DUCMi21R6HOwEtI4lTxfdF7Iz7GCYRgEI9O9UwtCdpaQfo6QtzMD28QgeEWaaFt1bffDSJQZwmk3eNwPtUdm64FXesdasTm0LrR7L9wWYDZu0qwso7VMFdOtmVbnFalDec1bEAsS6sB8lo64YqFuQYcRfiOiqrg3vrX8gtyiyn_33ACtRJXO3IJHA0kj07WM.mDdw2Kjl2.vlM22HKDbVisM9RKdiCVCVP6DHHVQvfvO8oiQj1z7y1jo1MmCqXQKjMyAQdYL.is9r.K9H8LTWUGU777k5sXsOjNY8QTGtdtVPx9ChTcVxtR5pI5mQOmB5pv1ygIipYD1DIzcFCoy_j8GVq5mHKAZz0YCawyPkO7SjN0gME5gu_sJuaSPy6SxCnw4P.BF9MycTX8guPfRwuCX1QvaiPWoZOwCXerAR5.jk5UvE7cdBtTdj3sbeD8GJAbDhzmq.QVoUE2ihRjyuG_p2J8CMQQqqtd5zmpTyKf79NnU40Xqk4k3GEBWl5VhB4uijzmCBRydivbhB.lVGMYDblUQwULbblP4ct1HewfKCVmxYOdFMgB1kHYqX1fPfDssoiBsxVzmeU8EXGfYEn8X4Wf7FQubb1HFWLa1tU_6DAX8AEQedbWOCAV4etuVgZKCc2bNW3lsZbla.GmtKcCdZsCHWyOt73I07CrZ.MSC2xIdQp9qRP97Nw9wZD7BgbZ5BVAlZr1r3dlNOSvtHSxOAjjcRFHYTINxTdtoBovGgNN.fxUpikIeqs4PyLA.DF4jwpQAuLmpDG2MNYyZe_wqsGs4lWFCCOVYfOOIta6YvZY5x1d5MjJLBUBwgB8yJg1Dx0IRyqh07PTG9vFNZs1vY.tdIDJVyNuWp3rcpYhiSwCRg_38Ub5qd1"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=910128767d09208d';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\/004336714072?__cf_chl_rt_tk=qiAL4cKYCX9Okgri9GGPIggablcGodo8ZJ3DSkeUfNo-1739243554-1.0.1.1-jkHAFr2BEtwMwf_Px3srH73nW.4d2bDVkQ5iAQ8cLMw" + 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