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-4601725893-gov.caltech-edu.pp.ua/post/7053819462

  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-4601725893-gov.caltech-edu.pp.ua",cType: 'managed',cRay: '90fe68e9e8eef961',cH: 'o4Ldtc..rrKEktYFzKS5G3EhEXmW3YuoMiwN7u0xj0Q-1739214736-1.2.1.1-hjFVwsTPq.WvsdB4asOk_yYtnowYvAPdjRTXsQ6PzXUzAxhNKJcAkaYnQLUl68Wa',cUPMDTk: "\/post\/7053819462?__cf_chl_tk=JQmc1zmNFZ4I7RMWRvVhg4Y9of6dsSd5vqvGP6lsbmg-1739214736-1.0.1.1-Rk9zQEMXne0QKW2Gab9Bu7TXSQQAYEOg8CzgSbYnVzQ",cFPWv: 'g',cITimeS: '1739214736',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/post\/7053819462?__cf_chl_f_tk=JQmc1zmNFZ4I7RMWRvVhg4Y9of6dsSd5vqvGP6lsbmg-1739214736-1.0.1.1-Rk9zQEMXne0QKW2Gab9Bu7TXSQQAYEOg8CzgSbYnVzQ",md: "AA9v_7fGNwYTGj7snV3yqjbA1Kc2ptqTIB0ZBxc_Xyg-1739214736-1.2.1.1-m_.xTTphwMzLHtz1zHhdasHflipr_CVOZ_6.XJJ0HgzA3QIcxMo1ePwkugJPfGEqGGfPPA9LpCdeobVPaLXc1oTMuIofU6GAHrbqOj.HeW2euxbQDlEOfw0JABjE8UL2dbkIyBwEANhrFnS56lS.v.zTTIMud.bkIa9wj9HQXgc.TuH1bJCusv.Bt2EpA24Lth0P1wO_baEmvVEAQXcTsrnQTM52_.fj1WH70EzXjo7w8nod2pJwLrKpIo1I6HUgLX8OixaHuxIb7gfPwwt2po2m3n9DkMd7u.AlTzetk35qxCCxQvJkCAPdr7NFrDi5pWx_IxGy1S._tzoXqujVTSn2tgEzgjJqgDxmSTnP1r_tBB3CaeGa7nLK4XSPypjo.DZRIlE442SxjJ5KpOQSNuukhzNcJVzozOIJeOm2XXTBE6sb.HKWvOfEGaCUm0tRmAk8fq92io4rSsEn_VDwHEmQGGhgUYyLMHFx2rJ6XiK9709ZClBxOpM65i2ijZHjczMRpHL8UAXaxdQdpE3s1XiViAK1Qgl2Wi6FU6kMbNWMQsugy371r2GQsBtYMR6caBMIUx6HgfTLeFAp7nucJCMRmM1aEpoX6cphKG2USieuAGdPO_lg67Eb7_u4CpqqPYYcYV2Q58oZEfgwNb3GzD5By66Z.xV1gDOLM6f896sUjL1ExX6Kkn1idl5YFeR6NLlJ0F98c28AFZqzsljb_j7bCW6kvetSPkdET82YqlLW_o9LKWolydyFgq2EjKOlsnJcutTF5jVGVTibBDTRWRStnl3ARwqqlEpFaORzzimylg1ym.uNYlHvWWBS6HXR0s3ZGDM0y2wTECybmv9O9QUYVYpDCd5x..U1oKGc1gdI_mMm3gauvYLJ6n2XkHZ2BrZ2bveccWLL.aiPdH6_MVZM1804tre3GMUY_SB.icpN6RNOBpA1k4farN4wOLST.6C32RA7EXl5B.8puAdQzIE0xRmDbx3o8DaeJRhleqgHWGnrqvQaNnFoewTH.g78NO_hGlrRMD_FolL7LFk18pbvM61TAiYvMgTe.dLFz.4t_cH0meqEaJVamqR37zoKSpP9nw8iDtXSc2vrxMmuGyvA57z3JH5R.C0GBFG71osF29BToZj_dN2LfNaGQc0Y7xBSonYGQVoa8nRUXSbNCCw2i6SAAPJXSTI8B5gP9kbARiNdZJl3Zpqdz9GwrIXU9CAHn0dtojUJBIZZINUqJJXOX7oF_d3M6Ln8ydZovxrgQ5qDYpJBJ791RG5gkXpEn1dEq0O9SGRK4.duk2bWI7YnyRnlTF5P7McTAoTJCA8H.0cuX_SECAWXU_Jj6yqY7AT0Ho95E8pkhMyUrfscANJUZcR5AwsaAvZnJmghkgGn3LSgi3ED.pTe6N.AYDEolYWbM18p_I06bHHwSp1sqy8qWTi9iFp48nxbhoS6fFeTs6L_L4phHSbR_whVJ5fBivqKtIz9QGtWuAxesaxMwh.6.PYpldnvgyt_TI6bwyvkXpwYxOwCR1e1KN4NWq2QClTUr3oOH2e_k8Gr1.WHRM0gRBCPwSInO1mn.VmylPB16vgKE49eiDO5xslFiXg35WamcCMBsXDHr8Isdg9fb.sXWl_7OqwA._X0oc18wNwufPr0j_DIooHqsY1N9Z4ONGdabipj_Nchk1E.I6z2kRxowCdRPcApPeYaAVHgHiaP6FW1wU6yNHVjnlXZMj0MgP.F0_J5Xu_c3vj9QVLQN3Z4SVvyHfPqBtHsxGnvMzGQ4A_TCloCUMGLT0nFTDC7Adf3n6UYeH7fLoOESOy5JX2QYcxAMYUsh_pYDDBkB7ZnqAbVbB8zilIy5CuUxuWMK9F7hMxSH_LMV1AWM1yDJJWBJfQp8WyuW_6Jwr9Mf14dut2hO5OHzPKKCXFWY_VkSCdlWuadrcs9oJa2s3CaZ3k30kHVY3RswX3UrJad_6QFxy.13iDGimLfwiNy6BBkjacy8hUPJ0r4xrBOkKRBAbmma.VRKH1cmYgp7dBhB_AJ5RRi8LxRrgsbi6n8Pa0FP3L_KK3hFsVUl0qERuuv4NzZ2.nz2r2zTt5712Kb3fEvmyqqlbdhPhIgtLk5u3Bu8QG_1l.klQv3mPxuKg9TsD1BOU8IMuCsJsu5yFJ4QlGYfV5eYuZ.X20o2d7YW9DvPea2jkOSdaG1Fvl354usLXGUOp5QvC0pZYtg2xL3KGQzqIKslZky3RudvhP4Lq9E0N.M.O1WSfCQMQAFrxDOIQ",mdrd: "4LnvwsFHJZQlQLL61fLwNtiZvoOw1YDGMO9CC9iRtPc-1739214736-1.2.1.1-fCyYVRFVZkOV1vKRITUtcwxI8O_gqmYD2mEWpsIqkm2mVzke4NCbJxdnY1glKU4l19LvM_IfESQRV.9GhXDqfYaAVq9qGbxrN3bOMZHjmU.l5ylYVCSX4Bz4OyAR8PpP9bCKolQ50Fi_R0e2co.0LgYiPQKpkiQF_E643qAWSrvfLiwwcTzr.T8oKrsUEpeTMVuRIt3Vw7tzqJEQmAXej1VenZyXf4asVeQpUV8q7Y13LVPWxnqCAdxe9TDXl.JmbnUch2dYyPEayxOZlDdtAqPvv4f95LEmPMFNA09QCbovuE8DTpfWucK81iia9QIQxg.ril79LW1nIsu8P9M1_kKV5k_USbuS6hT0_c9abGOMklnpQvS827l6z4rMhoLTcH0Bf3d4yWPfqOkGNEMReDI2bM4w7z5ipaaweVEPIKhS_YFev2ASZOpjWksJtDFtKTRybw2.II1apzzV9g_EQEeRFlUx64Dol6LtAWRwEkTRzDjgWo.6k5p050uVV8gn442mvgQsRGkKhHR7CLjfEnTT8NRo91ae54Vhq.Xr26sCWWbUYXp727vQ3wwiWtiurlPYd3sVuD9hP8xT3pNm3r7E5saV5bX8HPLgvsy7ftYT1GjeUj0Vsos6NWyHb5h8a7W5NTXXmx6vFtoKk4m.EQSHjwJ3H9l1PbW.5moMJ89KTIluSiHUr.28gTmu4G.y4eL5c29tmzF7htgOAnrfYlX82WdBg7FJXUdz_WjK0fZ1FVkzB3tiZniZaFQpz4YATTN6VL4VrEhpVOBm542B5KzlP4V7RJu2q07Fy5VjHlZn15necZG4K_qBdMIEU4vYiAgikXIi7x5_nGta_3a5CiCP7ZP7LHvvXdkYcfwQd55cfYGQxDyoL3JbTu71GJLEU0TUSQNrzSp0GlbQ61RLfsAdfjrFdTNVJhJmaGlzTQKnxeEKclBRnZfHPypMykh3ConNwy7lqOR2FtTxqCj9zP6JMI9Ya7ySrQv_1VBOBA1fXpqJytAMZF1kVqkBp.9Kel1RNHaccB1LdYY3hfTu_qh5gI9mOsIuRLXbK7agJIF0ksh8gRcITUFdxv0HSnmDCwaThhqe7Kr9XA8cb85_lPvBO5X0XwiSuLWbB7XqOQyIoN97SO5t3GG57DURMU.9GlVlrPcsY3qhjzi8HCSlAkxmVyEJ5m.Xn58iAwvIkkdyUXS93se9Tw1kp.xnNs3zhAa_UFOKjq0owMknnnHvNXds26ElAOElH6DlEQGpYRnUQhblZPSlFu4lcEhsqmC1VaXbPUZyBcSFDAAQtEkCP8fHmy6hCsBTMaaw_DQjt40YgQg9UCp1obuTID2K0EU4T49IKqZxEdVoIB5BXUBF.bMPVgCsbfxPbI_d8h8d4iaPq67Z4syQjqCzMd0kSW4OdmrNdZ8byPN7ECYx1.BCluxGGqGLD2XBb2T.vwzCgwMJlrCbtkfQwULy24KgLt78YPI3XLR1S...6OiK.YsFLaYR2xmkIQBW13nYzYwWbvkvmyIrZDdm0TGqJwqCTaxY8dIalTVmEljDtdRWm1Zldo9IHaD5erxL5xCr0Wf7sme7Ytvo.nnSiH_z5xYiiDOizIpLl7xpuHT27qwl_SpxAYmRGE7lCUdx3hrYHr.hp_M4vu19ApMabzwNs0Vo9uEd5v8u3PgbdzsBIF1FNBNObLaNXFNAodTxjaFGuEcf5Bsx6ijbXLtnsigB4W3C2Cba_Tfk9eCaFx6Hr_kGrAo8XlmbMDxywcjF_6TICcHnrAQIgP4rlj77CbNhtIa_yDzHd0H.aMeBCWjkUChwrsDuSuTVq7VVF78UZxkJVOjMV8M"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=90fe68e9e8eef961';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\/7053819462?__cf_chl_rt_tk=JQmc1zmNFZ4I7RMWRvVhg4Y9of6dsSd5vqvGP6lsbmg-1739214736-1.0.1.1-Rk9zQEMXne0QKW2Gab9Bu7TXSQQAYEOg8CzgSbYnVzQ" + 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