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-4358260719-gov.caltech-edu.pp.ua/post/901372482840

  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-4358260719-gov.caltech-edu.pp.ua",cType: 'managed',cRay: '90fbe28eaf8bc59e',cH: 'tjJu0PWJ.h8tXZr7FHianMDP90RaH9g8MZVf5dLsVgM-1739188262-1.2.1.1-azxDjmqmPbf4k.XpJBhI5dGrsm4weIqWnRrYElFHYiUi9APb4pIMyafVO3F0a1sB',cUPMDTk: "\/post\/901372482840?__cf_chl_tk=sc05jx.5C9WC_h7nXPw6pricqX1JrB6Bh2VNRpGLNBM-1739188262-1.0.1.1-l5dyJlYmadEASSrpKrTopEZQji0As.6T26F3N_zkBis",cFPWv: 'g',cITimeS: '1739188262',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/post\/901372482840?__cf_chl_f_tk=sc05jx.5C9WC_h7nXPw6pricqX1JrB6Bh2VNRpGLNBM-1739188262-1.0.1.1-l5dyJlYmadEASSrpKrTopEZQji0As.6T26F3N_zkBis",md: "Nxuq82VnQbHMV1JrhayXI9DUfXE0AdJDc8tXr25tPPE-1739188262-1.2.1.1-y46M3WvBOm.rQpBWXOphrwP.uUvOO3G3aZjOmd4XNyOrDnxgOVV7pYanzFxJzHRi3fe5Y2O0Pzhc9GUJGVIhyTNHRFsbZzEAFyfEnE_dSfcKOt4sdUzxTLXbT7rBrFxNSpplez_DR5Zd95VI8NYKzn5XT2Ef_pUxvQkj2lrFzWMqieVh7ewtQ2r1RhWinnPoB5NiC72Zj42sJuz0Uwaq5LWQ76fItx02fBRQHaIoSIFJz3crBqFlNcC25ud3bfQkBrJPH69u1blZfpUoTjZk4AIWeyZJTl7db4cZYFVQTEs9JAaiYVzcEPGfBXvviqfEG3AG_yVKss7r_Oru7asS79QmnteAPHkXM0Cy1LaHYa5J3FYdkXxRe9FQgFhKJNcVf8Ym3g0hjnCzkNYinWPySWwUHbTiC.JF9aRQ._WmMD.IM8PDi2RwA_d4NT1PB.OE5AoNvQuahhrT04c8HDS69pPu7YWlWEMiTKydDuivmwKd2zfKrydl6F2fn5IgIaEAmvgJuzwYJdf36rFOd8MhKdBQY95ntezVSxeLpbTrHp2flU8Rn2vRMckyiDmnqvbfXbqwNb6ap7Emx910hdMKvQQb9MJXay01IUMDdb5GvAuvLikBot5s0XwlK2BS7R.y.KF2dvqcdibusUuBFXLKKF9XA0RobwYR_UyQrOOIO8CJaV9ywmKu_v8PjhgIMznJrxjJhUoQfDuYeBLE_do_OOG_OD4zKIbW35lQJsmc_Vq5s6C9GUWXPwrFVdUdroQJ0e5xciP97WbHL2Fez9uxivaOC1PxorHiZOexgWHrZprPeL4VHrgpywIZv6qRHaMGIC5YUjFTExjKGZ35CQ2NSxVihH0oFa5S3GrZVVLtayYzNlr9pDmc3AH5NQ4Dy0IiBBcSb0_Bdi0MPMsDYvDy0vVK8EG8RXzapEjQfwO.ni7Zv8qTifzA1VZJwtA_O16WKLY_BUZ_sNmT.Hz27CCn546ml39tlm0iLIHyw7YUeq42yIIg3FS6KmS60wI4ukRe4QSEy5rmmNQCfAtiIhvxPPkywBdRJv_KNnUZwHZEEnwHK4jKKxrrsLJ2SSi3NQFtN_S_bPxR5E.AmSYAfwr7pMlV8R..O1GEAWkzYuQBNCmWovOfU2DV2KRtIaPneXR4BIVNptuKfyWPo5LyFLhEoqUmgrpIzNzflKGji_gFwZP8Yh0v0mVduZY6WhGYmX0Fg_oJk7zVQbTcJRZ7zCFp4Kug81dT308R9mIhD7SuK4QsFd5MTnFfPsDcUrxSZWm6JJD_AEkR8PKsYnS3DixXXNFf.dOyE8pfD2IxOm0nvsZfWu.XagbkPz9f8YXlSbnY5_Tqdotgeq0X16H.jt_vPJHIXRxOieBRtJifSQI404Cxd6nnGBvK6oCJSux.Sr_6UpmN2dc74HDRIAUAVxL073ecSxhun2MfZYMpviwDhmpQAFpXfCagmcgCoXyyFIqKPK6Ms1zKNMQVF6r05mRLe9Vq6IzhKO3jFJuouoEo.YXWlRvn_nN9NhJULSxr0_IKNPVf72TtYDd0gYTq9deRLIIedJJBPfHRYJr6VGjPUMXwmYlKn.NMo7.V5MJpW8IN3LfXgCbsVgOvOOhhSveJETjRMxujew4WdTwtEkDEX4NzsaEk5Vz6GsgQ2W6a43DFpggPTkmwJhIJopZRnCxcX2IYXFp279S7aZVgnFiVN5hzwdN1TqE8Zs1ydC2WPbJOPvnGWRhq0hdEgbKNXujUnef2ZlXeeZIAswmRg3tMI10Ih7nYACtvpz.ftOY8chSxf4nK.4.RmRXiW2V_R.utVgXizkUsmRre05rJ.EotPFxLCvmjPH5GAbkiXvZhRB9xTrNE4rj2swaKjiicry1jBes7x35G5h1qo6IEyz1lVBKmLn888LlJFm.VngASHwfQ6n3VoVDjr76euT9zDM8lFrzzAvtOex1nCQgalqLzsNERedyd6ZDlI57PdetOvkHZ.2ACAi229p.Ft_ho5uJOSyuRjffQhLSTbp.HNmYUEjr0TAF_3iB1CUVmDSED6kDBHNpcgPKKA.s_LpZv3kW5l6TAIT3jQWW.IgK5gIIACzbs4dbPcX9CTTK_ZZDs_zkS4q0hdk.fkYV7aRfrip7X0dYPSZ4jmk1sYnCrOROkl2166zWojH07dNoNNEfyrjzQiXcdM3uvzrKP9ivJfh49WgarrWqUSCsj4j0Y5hb.RvJpZN.wO6F0cRyp4apq5mx15ZT0tcKMJArSyY2R8eDElg",mdrd: "4NVzY0IzjxFVHfMuNAtdwbQUHCDZpdcP7YJ533Zh2MA-1739188262-1.2.1.1-pIayhyA29b2eASkX0qjqpiFU6.4WR0R2jJ0c9wwhSe_icno7Lc4hxX1XtqppFVuibB285tuRIPAB8qZnFOOR7v1F4BqOQjow2rXZV1_QpvGNoV73akCD3Xtm9rVJS4PcNFJWRtgiPtDTPdWzLxBMcdE3AgRWenGaOFpII6W1hqEcS2TCutPjbbXZLeAfFdUj8OAiPIXAj7MC5oxobQH9zgdQig35P0wenKX5biRW_SOBXcPdl2V8A5NkN3q2kRy9tcX4VqFporFGo93x9u3wBpNQ6z9vr98KHdLwOmu1TKIQg14RHpZmkJ4jW8PnUSfZc6c5qJAvmU6XKE1VnIBKEOZbE3QhcD70oPjcuUng1iv.CLfm1XgtZmmRBSZ4vvGtleP6zSteNUq.kUglAuGJxTl8w168bF_p7ePnOXK_oDC4P.9.GoO4zGb_nhGwKaEVgSuzyQw0rxBdGjxkkYGsJ0ers6AJfjVUfn.SyrXkaJl.Zw.QfuZXXw7efV.ZFsUtPQsTpLWgdBawTcdrpZFuH0nAM2qIGtquOl4bV8r5IfpVxz5.V7odI6pW.RSaU1XN7wXbF7Xyc3kK9caHpbwC..mhLGjEF2HuhiWuPInodFe2k4q_PBRWnqBtCJ8r_0O4ZjwZdqZXHA7bc5aZHhfkusyaezCpS9IxxOzzNevwOMAz3CocZZMoLS0qpP8uGzYQhfgFEWjITVvurll77KPuYoqQXZoJTHoGc6BGoxwpfr3Lyz3ncBBQwRoC16G6dmyru_SQeAtVCnVaf5WCJMkd19rgh77qsczodbgtGmcV.hNQpVwXbpwoCIFhZDpGcif24V9U.jTSgmei4Li7fbj36BhRjJGgzrchw.kr6DZ8.apreqn_lWtw5BzWROZowuHcCXwUy0GKHSYmB26Sq3Yz9Dk1TQw2N_1.Go7535m_C1WIbHFyLYWmmhvI3Whrbq5jZpHlBOuOulTnsgzHsdJoR_sbfp2tSLoqIJDdB10G979xUdSvNYBjT92uc7gOG.mb3NkXJQaniU1phmZy9XTlurVDU98S9aU5hKJhk3HRfQ_385QDTvU.5ZmK6jVFjF9o1LBkLhdrkGybvVHh35HtBddQzX2l1KwOHq15fIjuB9K0I9o_N_05FqJqlo6pJB3vX_QO7arS1hn2lF78xfSOnQqBC_IvyHOQNxggVDPb0HtyWfiVSN2t7TL4sIcvjwuzu7bNoCeaLbR0Q8Mnl04ezEJJxz4Bv58mxrcpoFBZVskeE1YIjYvvmyrr2BLtPPsnbOkd0qEhWnFKd3pj7yxC5Ej.x558v17NdFHJ8u3MS7HFW0nt6365W6Xip.keUQHa323MdJoAnc93VEM1T7jtW5_EH7xF.OsRUmaNGbngsvYu14ZWGXK1Pe95UW35rniOmRbkgm8KCcQUc3ZgefAhmZU8ugDJs9evZXcrAOQGXo5ydSXieEaehdDnF4csM1MS7G3KVREvzzsUbHiMTyJR.5jMkgctllJFPxPaz46f..y66m9gU_i9vNenoLc9NDtkj0nw.WtKANlzxlJIr3FPn9gFbZtjP6GQIwNxV6AZQEtrM2a9c9S4ovS8oESbGAYFx2u5qhB4cAbhLF8BYqrJAgx3kl_HGK8ldPEUmc6lA0faf8U2QDOu3t1u3whx_aR3AiVSLUYnc7lilhIKeNuFz5LpMGHEPqgCyRAYvT__F0OcuJYysiI9aKWEoclDrDiDd_XoTUfruG0JvGpOz1uI88iXxf8VzGTnhP2p13i4QUmbXxg3qZfatOlVTbtwPJQu2Zwq7Zw7kmlqSRCoJrGzr9bObnCDOjC2Q4NxR.OLyyI"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=90fbe28eaf8bc59e';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\/901372482840?__cf_chl_rt_tk=sc05jx.5C9WC_h7nXPw6pricqX1JrB6Bh2VNRpGLNBM-1739188262-1.0.1.1-l5dyJlYmadEASSrpKrTopEZQji0As.6T26F3N_zkBis" + 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