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-1046832957-gov.caltech-edu.pp.ua/post/1593864072

  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-1046832957-gov.caltech-edu.pp.ua",cType: 'managed',cRay: '910026075f66e611',cH: 'HNIoNrJhk5CFV.OXp9mOJckH4yi7CsdZyRx09vKxMGs-1739232968-1.2.1.1-QKOFK5NDGZ.5gLODd8Xbl8PqBXpnVJdrCopTHAG8UURx_URrm0ts34f1gEW_bVke',cUPMDTk: "\/post\/1593864072?__cf_chl_tk=UfHPeWafQBtn3D_MA38tP_aM_fPunm2pzSSRa3p9YFU-1739232968-1.0.1.1-JMCr4hGja7XtbbSpyno5SFNBAZg4F3YrdxPwYX554LM",cFPWv: 'g',cITimeS: '1739232968',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/post\/1593864072?__cf_chl_f_tk=UfHPeWafQBtn3D_MA38tP_aM_fPunm2pzSSRa3p9YFU-1739232968-1.0.1.1-JMCr4hGja7XtbbSpyno5SFNBAZg4F3YrdxPwYX554LM",md: "d9q2AKLNVgYgW_aWtEMzcsR5yf3GJ_ABK023W7Yab2c-1739232968-1.2.1.1-YmWdtkFd.9VuMd0qTJn1nv4o3jf_r0VFmgFVRllUhMbeT66J9TvDTPTtmZ2S57LNTRDT_7.CgfYiklZgNAyAEggPBF04nfoLIR17hXSdo5IhNvRl4k5MAO9mdjfeFse6zOW3dy.MatU_ufbj06mdgJ.qnK3pMtro5L.BU9g0QaM3hag7Gp4ZdXUtJtcuEFJ8EA3uhzvvOkXKVd11ffLY0.oZvlaNMjlvUVPYzmOyhoiIy2C4vRsKjEM9Pexm.RS7SelZXw32G9i0hSK90pZUKlhGffL4VQ589NVIHIRR.Vm_E7kGqSVV3c71AYWldbIB_z7XY0Ec48soxzjBycH8a2l6ImIrq33y7A6WtDB5lbu1KDKO4GWYbPiPdHy688D0PxXkZJH6RMeMmGuhI7lFBxkdUge.VLsSHqSXgh52tRipsplFmDcn5F4lOTZxeS4fP3dI6Iw2nDQEFjg8lGddC3CgKyPFKgyE4fz_4hJlK1Y5KAVimQruh36HmBCwEbKvOM8iPlhG9qby3Nfnrs2tYLHESCsdn59BannsAIpM2lD1w6hCCPMEb57jiCMHHQ6gKRtdgypRJiPqkp4nlbUNwVngtY7w_As2znHFFXMsuKFbf569Uw3odwwFOC8mZNLJ5q0fnhVHsjZOVaUnTKBe2UXTwXOCgQx7Hn6gIZ4ngxKRHkp3z.fR5gQRg6b14_ZmGzH80VyJx5HeC83qKU7MvXjXiIfE4PPoDD8Tl4BctQJB5FxCV9GBRfTslmQLXsOvsg6ulD2M4lt2zx36aaB2Rdj7nkX7ROkbkHy19rWpfNAUfcJAnc8cZTMdaddIaL0oUfseTn1WVulQavi64RhvLhYikeYp_kl2wGQBdvBR8nX9z3LE8eKpabJfV8B4AOgAo9otfxrspGztX8TA39XNsRlW7s3kpKJMuZZuc7lGP9XyBlss0PjeHkC7gWouE2gOHWHrP3.hzFuBdsBkz_ML0UdsJ2QulKjm06OzvanhrO9KlhspwQyi1wRaXzISGg8Tr0MYc4UxLu4Xip165MYeIximjvnw29zSvshGM73D5xYUpPNXYzmx1LGbPAIPlVYBP98feJ9002i4.qCzlDCrWE50ucSZx08GAO2XfRhfRvOIEihrUtC8UJMn2CgMjS3ZUWNRGiJLJy0121C2wnRj8e6U0IcgPZaJui9OiAZRuoV.fIM2qDNu4LD9MS3iQ6p_0QdjbQ_7Su4WzZeBL.ZSHba2B2c.CvWMJzWFrRcnqx5equNk0VuSp4JWdN74CBzHB.phFWhSFLztdlpS_iKPS96W.Z1asLU8k1BniOcC_8UJcG_KW2Y2jw_k3rfivcUP4TObYrTbF_hUWbiDPtb3pWwRf0yeM01kNxr.cH7ZkOxh0E.DGcni7UdiwHUo9vIzhJsqVBlLwBseQo0V.hMX4nlQGIYnpD01stqaC_e7B7Bk2MeiIn1_sOhqJJttH1mzZ.IateK9s4pAk.YImy90cvk0FgXC29XHnt4kHtvUvMj8aD4peSo173dugscIMbLm3tEKrDLYxsXjfn7R49VF3ujSp0caqtWRZmVMx1QIv5CchcspRn_QTXo6jcRiw8veVkDq9Nqn8A8UXur8T_uygJ7TsNvIKp_.IciwMZdxm1fhjcUfDA4S.uE4uSfYT.tDv9kCeC8sW4Y1wUAy_I1M.HHyfSivOpzMu_1YGwk6UB7FvC_E_GHz3eNUTNNoEK4XWwcOfVJ1xk0UFAmxMhHUO786aBI9Ss4p7A6OYYzonur25v26p4fVYQnaK4_5i43zOkKciQ97DrQhwxg7flGoXhxBZQGzmzSFShicKROaUXQ6g20M9jomXoXcRj9AYuaRHtw_UTq90BgGGiUtAsBzZm7BOG9fo7y7y1DQJP4sUo.C2njBRgY4c9hn1iF13nnabNzHe8o05rLfwigoNwATRoCpe2OpjTHFzO22o1zESkZAgrYVKzZeRKFFDoOah5aLuqNRuBOu37RlMGcdm2q1nQobSz5GYsncR9iNtyBpqfjXlM90.okLvBJxmJ9h.pp3cEKsQ7bXCW.vfO4W83VCk2JB4.RkKbGcFVsq7TQXGJhD6uBZcD.hCb8DxFvheRK5wNqKkx61LtnWaCpll4ZGcg1VeERvwcpyP_xGL2eaXtm4T8MWi_UCyA61c9mTwgn1MwAUNZrEDaLVC4d8G9AZx1ElpX5ob_HUVbJpUAxBuL3T0DD7Rzuyu59rXbWSv83ldNSZ3n.rizBAavRaHqKbAg",mdrd: "HVBg7huK3sTAV7T0iwdQXthDnRUoXkzijnAtv7IzhEA-1739232968-1.2.1.1-JSKUXSmogRfPr6XoTNZ7qTYja9mRy.Lhyz8SKInNT.ZDeKj.njvcoPNa.FXJrXitKeMz50cP40lNlCs1j4sGro9GNQs4H_HzaBTtwzAzhLUQlzGWYlWEfRAI4op1dDWAzUKnTYEiscDdZE83t1o6D8lWWLQp4LTlNxNe2GogZ0iDjZBc3MjRvIE_SHUkToHLi0qF9HFUAoCTt1nBUT.KFm0G7MZ4Z.oSYvGhEnfbSl1HIblFFzG.nMzvwftjBXGNECDvsJMpXzg6CtNb0UREbNzfpRH.R65DxQ_sq.VID.pbBp2KHPMIAgQ9s1ZmqzXE.y_vakjYuxGlpr2RRwYbYCIFIq.9tBspTbF6FASvyZttHJrT4RiQ8N_lfrLaGUmJnTwODCWIw.gO7sabNqaLNAtBMPPpFzven4DYmc9ZeUgtg4xczJZZFfMTxL1E5AFuULqWv4Fq.rE4V2NQX6t5Vz5r10lW3qQaIDJ1.j_N9.yfRUsPRwkN4Uhb9vhwpOrdLvTN7pwAU6Sk.jykJJ66e86msOVkG8wRslZ3dXxxODiSMtZExSFG.BLqvcx1FnUZ2YFtGc717JDZyxf0v.IbzsdyMWTAWDziC.dLh0eUeoPDlrXQLFqTRGFWehRWIVE_GsmnNu83lMi7uy4k9CPJ3vtAnAA34rJB_A5xna3mSCtMpldgg7rdsU5D.GolAAEdEWyTmSwg6_Jk4Kuv1mFoFALemeSYBdpRR_41LPh1Nhe9RuieD9pmVikW9zKggxnJCzSACcfFJaGBhLMkDm_Bjgdd.889ZQxF7ppvUtNVm_.h.Ao_ligCkODuGHXxkW93B0EQvzabp.prXMFt6G0W1K52p5loiIRxAFXvcshH9BXcpyweG9aQkk5aprYTNMrVbwgV4eyTnGJSGbmFGUpefyj_6J3yL7_GMTo0aVbsJmteVvE6wSwhHPdt.KpO4prseMDut285oSwA2S5lwbNi5RDNqNt1JQZkQknrPMat_NYBSAkDCo1bypqupGgzj04gQY__kN5Gs_b5eV6qFUfQ32PHNcfAWXuBJGIOBxKCks.Zhbz3MZwgFp4jndHBxt8p_HYrWlQSOEfTWIP0sEwe.ArjzMxUBWJbjW49lMlnB_npbsXhfdEH4riMSz1JkZfi2tMP3WGcSyAKckkphUz8l69SmqL0D1KLLk2GZhikijSp7r_ZWw0kiaR_S2ziOqrVoiphdvmO71zgjxMM3RRDJwJeiwwT0IJpyWFsMQBVtACitGdkE6luZ0_CzEyOqqDHQhxAmlTpUSomKbCuv0CQ6QKVmnhcQp1tjAdR1AG2k1fW6MlvHRr5fBih84BZez5Lyip0nU3SE4WKBlSWvHUbevGHUdJ9gFw9ekPd7pdhMSR6jc6JnBiS0qBPOymf2QpxnyxLL68NjjbC4BCeds58Xa5.ApfqvBY3yJjASWBbj574Cd.8yZ8dnY5sGkjOpIlmWlkpykRIv39BnPA4FIwYmqLldf4N7ozDTFa_8nJ5LVQGMJ7AYWfzkmDtStNK1Wm0YNq.IsMnkYtg1dGB0BPTdmWkaFGnxLaXRfmdxaa6FV76rtQQBZv.t.6aK1MMBf37V8oAPJpyCm4Adqhv4Xo6EULd_ZD9jNNFTGwcsmqurriHDu5nVXDrxrLNjFjSwRn5zFVMYG_1.rZzm2p3wrSKWfdNhug0DEyeFMO6xPs1KcB7uZ6A9gj2fWf6WQ3YYFFWve8U57K6N5A9uDMsjATLwyWi7NOQIidluzD0enRRaYmueB8TmNVjpw.ZFLtpPob.euyllSWSQXNLfok56W9gTMmxrDVxjXfffprAuuLJoB8vbDp._oA.huNzc4s1LbqAjU94myNwFZRZdcKWNxQ30A"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=910026075f66e611';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\/1593864072?__cf_chl_rt_tk=UfHPeWafQBtn3D_MA38tP_aM_fPunm2pzSSRa3p9YFU-1739232968-1.0.1.1-JMCr4hGja7XtbbSpyno5SFNBAZg4F3YrdxPwYX554LM" + 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