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-0956823714-gov.caltech-edu.pp.ua/post/1659804732

  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,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHdpZHRoPSIzMiIgaGVpZ2h0PSIzMiIgZmlsbD0ibm9uZSI+PHBhdGggZmlsbD0iI0IyMEYwMyIgZD0iTTE2IDNhMTMgMTMgMCAxIDAgMTMgMTNBMTMuMDE1IDEzLjAxNSAwIDAgMCAxNiAzbTAgMjRhMTEgMTEgMCAxIDEgMTEtMTEgMTEuMDEgMTEuMDEgMCAwIDEtMTEgMTEiLz48cGF0aCBmaWxsPSIjQjIwRjAzIiBkPSJNMTcuMDM4IDE4LjYxNUgxNC44N0wxNC41NjMgOS41aDIuNzgzem0tMS4wODQgMS40MjdxLjY2IDAgMS4wNTcuMzg4LjQwNy4zODkuNDA3Ljk5NCAwIC41OTYtLjQwNy45ODQtLjM5Ny4zOS0xLjA1Ny4zODktLjY1IDAtMS4wNTYtLjM4OS0uMzk4LS4zODktLjM5OC0uOTg0IDAtLjU5Ny4zOTgtLjk4NS40MDYtLjM5NyAxLjA1Ni0uMzk3Ii8+PC9zdmc+);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-0956823714-gov.caltech-edu.pp.ua",cType: 'managed',cRay: '90fed5cf9fa381bd',cH: 'w3H1oojvVG6.5snux5k63QiJRT2eV6ebctdsPWGiLSs-1739219197-1.2.1.1-nrr_rFfFIfeAO.DIu3cifBipJlBi.mYiHTYWCoevOXvcyW2I25nhwwtL3nFs1_0J',cUPMDTk: "\/post\/1659804732?__cf_chl_tk=V.6bbljFuYbBqbn_ecjrZwThBxPITNMd7geWq9OW5ZA-1739219197-1.0.1.1-j96dgtkNJwj55r9uhY2j2flkpsRaBMS.lzp9ku4IHAM",cFPWv: 'g',cITimeS: '1739219197',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/post\/1659804732?__cf_chl_f_tk=V.6bbljFuYbBqbn_ecjrZwThBxPITNMd7geWq9OW5ZA-1739219197-1.0.1.1-j96dgtkNJwj55r9uhY2j2flkpsRaBMS.lzp9ku4IHAM",md: "LLc68beHyAmCIrJvkwyE28gd3LAo.VrCUI9Qz3kQNPs-1739219197-1.2.1.1-cPZjfz4OMgCQCrEqo8zO6HFOI6862Xn_x618e01_t6V5FYF5vsRCd5jCSfTViSMxQqwzER3CcE1K6cpjHuaJSXooE08O5RK4ThBAZTzyzAlt.C_4jdr1MEh9WuGrb4.UHuvS2Sav1xr7wxRsBTkXbyjiRyKpBMTGDq0Yi_2cJPCs692rLQdsw6TlmRHo9rAYlKS1Ko3S2QUFwldVo4hOnqX3o1PjBFaT751yprJYogkWGtoCdEcKL6MtUr65gfUCOcfSMHXh_crCw_EUltjO9bcF1MA3GHQ9oW7s13KidX.m5904FF2k6GnCXs78tD_cKlJTWqbmYQPuG.30BumrgyeIwFbSazK4PPnr5xXdVUqdEp2oKSYzHMTc427T622.3XuMrvx8nM42DIw4qds3ECtLD1soCvHmRqb4jhnQWyRt4ncNhiWN_iRSWSVI5TGMVmtnCtcgf6_tTu1TCCrxhwx8FJ4B9nmveVTLnzGDuAVSiiYtihqL_LwWl2hniOp9F6phOp6JNHftFM_vvN_MfaA5NGErB26oUDtaMN_mypGUUDCeU8rY_4AFGjzs9EX3ZRkMEY6mW9_egsvGrkrQntpMqAZEp2lCrOYlJzmxDcB2Qx.gHnNIdBpaWCcD9LqOWVPcpM5NcpTFtj3f4cTKA6.s66tbfEC8SyNtmOlKpBEU6WRoPipvCYVSBNqNnBtD_gT9tQUCrYpNCccm9LtDg_yDgL3Y9OSUTCKIwWAy6kDI3XyX2JmY1E9QQ.e2rwpXTYZH2Dzm9Z1FAukAy6sIhmXiSIfvjv3QQnCCB2qEvrMg_Z6UfRMtYaubmkiA1UfIQW6TNUwkJtJXZUiYmde6.AXcle0xCd5JJRXd_s1uekFlu75_xDXfzhvomw34kRKANyIx4hs5NnxLmtAEyQR7UaT1pWX7xUmcvkIP01lsiXAtr4hGZhP8yhWFHomSX8kroE423MZb4C2AToWlZOHBpvJ5B9A93dBFEkl4B6E6V5oNamTMiAbxkiZk9WuMG8CnygMo53FVUPX_1xeBEQgbxlplgwD_ixLaCA8F9CgICC3e3afLfcTL42v5fudsVrXJwwrrK0UPU6XVa86seAzSZ73yS8WnvTLaX.TFloGvlKMpheDfB.BgD7AQWbhLR_QWS_05DllVR7AAM_dHcNGF0HXnIoHig3auucLSdqnLdDlNhmhL_hBF4FfRD8EP4ywtjGR6_.NJ7CMDM9Qa0390VvxXNjgcnsrXPSwiwyg1J1q8uSOc5RZOoSGyfwPak6T1ltGIvlquSAq8aClpf2ZS9gzSjmDHjbW2RbYF45e8Ozc2iXO7735CdkE_ijbENVSn0tnSEzSN1remZxZ3PK2Em.cdO0wrynMxozDiSnAD.jO_BSKTbVt9QXT.rOqmz1WkvTnRuK.ZD2WAJnfQ36TCjqTqGpNgGX1UuZ2U.2wC3saP1jMcmIMVKQ1hiG3HCiCV0YU3WYJTzxi8h_1SBe5LV7u59qliHZNXwVmAfEj5FYoMZchDfP1uLynJHuryOF2_sUtISQpHk54Eb6ARhYEMQXrKH7kYseDMVR_lQUi9Ny6XLuDn9xpregJ3sVfHWZFHmrLN4t0LlEKzkNpwgX5NU9PnhQPz9OjeIa.62xH.Iqf8KvPhMfBmLhsDbqZ_8E2uFTBtuI5CCrfDblxhymv6Us5uyGWpZU3yBUBlxbTm3TaHoRY3gR5z57CHRNQxuWWsvpMFBOjlIUb7pbv4lQyHaXI4RiPRRM6M6pMEXbEWHfUwwgS5YWRm4WaxhvKsjV_fATCzGH_WqEv3WNj7GxFRDZbHFZk8Jy.8GswzMegvDjxTv_Mx2Zv5Yj21gHNyJr7ALkmkm8PPn.mRwgjT0wshUtQvO8TsEP8hl_ZFiNfQ9gWvUzR5nUVF3gibLrwErYaehwwwgZpZ8n9C.FDFPXhH5rjA3dc4lEL2Lf7BIxIZGTpc.BxAOPMMPm5nK6XsyPbYPxVNps8TaZ_T3lb9IfspZyLVSup7aeJ8spl6B0gY5tI8zJC82K.gI2zH2.wUofxXHQWZ3YdGDlGxDLh6OM6F55W1OfdbByNhk9tNdls6XdLPG.Q8lj5oew8jNcgizI1d.HLUxSMblJwSsXL7FqK6RU4Okc7cBKmBPZYc.YQFJxZBLsN0CXt0nlpIHwOuvwNJd_BVHIo361wn9yOfGsT4pY20ieryysSER8TFOy5RgFaHFSPejfeXrSKP95jMlXXz1zaDPX7d9G8WVRgHBjViiQ",mdrd: "cQidi2EGmUYye0dmocxwtA8SvQYBqeVBpbKJj34wxf8-1739219197-1.2.1.1-_UWSpn3xdAl.se7nIr7Oi2vWRG_jcRKZ0X84YfXStFa9UDaeTYbZRnhkB06NYvGWfTt9uKaTQlplNB9ZiNNNbdTum9IdqjkmEm9eHGGx7jpzBmJAFglWHJuIUzdiK0C.VHEogNH4RJW2vh5Z1gFtVZK2S86W2OOaoypQ3OHW_Grp5JDNrpg.NGQDM4eqWMaelWfx_37NIJoRbcM9JduYjV8oEw48WwKSqBU7UJG8kFP5aJwpTRhHCap86CzNj29pzx4qQMHEEW_WRpF8sanEMxN_2EjKorSL90D4KDuP2DIGg6vUIIIHt6Vb5XwBi4UXkrJvUvOCVUiBUAtV10UsoekFbZPyRg8FnCXQlh06pTBCXIXuAYDVu3FAGhm3QwBDijC3HHWD3.Prnw4L14c4d8kZ67t9y673Y4znhdo_BzlZYiZs.IrbPSWR_fsdEgU8_uDOXil72esEAzNMZNs.RA1NOzwvUYp1r72Sr9FrkWaz2rYEnDuRNUbSLhWQOyh54Y.OTs4vwzHImbAEb1X_S2MKsh0YeWzF69tx3a9A91hEw_zpqUjqbCfpqZ2sOH9i0W0fLenCnENXfNi4Z3UCc8RKgqfh1Ec4CVGQY0lod3TXxeny3cUVsBhZvvPEnDx2XYVPcXiuae7rlIFST6xgBhChA9C0rLW8W4O3uNI01oN2Do2lKdm7nMDkRpHeeGR30pKSnDXf2r3pm2tqYxOALSCAMjYdzCTqlBudmjAYMJJ7HKAJvzA6nRUUWZpH8615aGpXQpjOz3B6.yWDVeB4c6ijZcTDpH9QtkrzmaofYvD5cx_s_dr3Nu6bWiwFKV2VXzL3bQdiKoBD.vY6MsMLiQ8_zSLwFszvEzeIQ1kHQPd2U8IwcZiYKj3KXMoo.2eiGnm2Pimp4aO8dblwh5fJdpbzsLqd.Ctu5g5iA5GoOAUjZbreeFDGXdaeidbJmJzM1vVbLVZtwVHwVUm8Zl0ayfHpkY5tEa_jcLKrYf_wayvAtWG5ifX__19x7W2fpEVQx9VMrlOTwKLrOqwonUZD0Bx3plFgs6HRJGAPsnfzaaT0eJlXC4hFilkfcyFQtm_QYPUlFrP5MgUN8UGk7pAgR9sT6os.afzY7YOZnH3jccbag3PtN5Dg4nxjlojigBgC6kB6XllPmTNkZC.hYzSbCdpEf6dxXgTS5ESZV8isXmB8UKs8BtdH3q77vUMdYeaga.Sg.hDb1Z_wyz.YmhyGezZ395.Oo7OZj67Q.LuS24cChd0Mv8h8qZWq09dMWKtt8o3Uw4FDf0rEY10ZX_hx7lLquiExTLjNh5LxCgg5LSIxX4D7Wgt0JdgTL1x3BzpGyBOJTatErT7JG2LRysus8v06PHya5nO7YynYzWfWTp6NGYzdEqJbbJtf_XDDOTi8Z3JH_eS2ot.3g01smmlEjmDdPgEAmvcVdzhfZM7gFplVIpVZuV09JTfRXggJHku9TxMWM_WIGp6TgQwIDctx4.._5gBVpK0hhQVtQNiAluTcliaLDCdG9R_7a09B3rc.iNdq7FtIl85RuJAmZ4lY9VmIRCg1Ra2b2g8S9SBBlSJ90f.gtmywe4yyEMNi4vz9jvVoTIhFnyeKkdeec9P.sW4LnwbaXl0FjsMT53gvGgaY8oMRUVJeuMObCu4Xrz5NqUKSLe5e4y4AS.CQzRKhGynVYfn9pd3WnqacN_PMQ7ezKEIChRYVaH17iGtcZufnB5dHHlz3VeGSEbRk_NVEe.kY81RasA0YWRke1gnLXQvhNR42Swh9UEpX7lYXko5KRDFUVkB7NXcuOOjvOK35o5IxYOFZmGG6ECZ0CDdYPHCRRcSRAwVr3vox45_o7sjL"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=90fed5cf9fa381bd';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\/1659804732?__cf_chl_rt_tk=V.6bbljFuYbBqbn_ecjrZwThBxPITNMd7geWq9OW5ZA-1739219197-1.0.1.1-j96dgtkNJwj55r9uhY2j2flkpsRaBMS.lzp9ku4IHAM" + 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