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-9378504261-gov.caltech-edu.pp.ua/post/4908623175

  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-9378504261-gov.caltech-edu.pp.ua",cType: 'managed',cRay: '90fcde8a1d51c96c',cH: 'GdVanB5YI9KSQHQieLBVXkZs5wKefOzuBR3J7.ahETg-1739198583-1.2.1.1-p0gbN.viuyBxrFdBYzsHGiNEL7OUeAfPWfQb0dnkBn37KmhQsrB8VZFa8wZLKy2M',cUPMDTk: "\/post\/4908623175?__cf_chl_tk=j17kCpBwu9DaWBAKhP3a6FWv2daNeDG_NuC_0S015MY-1739198583-1.0.1.1-.p0p8oJF7GzkoMvCwU0sn6cZctHDAlKyohmof15B25A",cFPWv: 'g',cITimeS: '1739198583',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/post\/4908623175?__cf_chl_f_tk=j17kCpBwu9DaWBAKhP3a6FWv2daNeDG_NuC_0S015MY-1739198583-1.0.1.1-.p0p8oJF7GzkoMvCwU0sn6cZctHDAlKyohmof15B25A",md: "ExNvfVDHj0mTjUEyRT49cLWXjwPYS1lblPrYFVg9yX0-1739198583-1.2.1.1-5xtgktOGXB9VJkDFyEzFpyMuCnKrSdNjml7puwzMZvnW3sJiG6x0vnNWZtXoHO3Irx4ScjHpaQNEZ7QNZfGpGB.VnBHM4Qz_JTrmK1i28TEkGyAdK85OxoAzlWq1LdbOWLKTfGiH2e1LWQic39I63aPWvrOr5ocfRDgtV6nrrxZceaxw.Vb_s5CI_IC3vVj6vvHD9WEmLofNOQrGZ0bMetgVo9I7BXBCUrZXbQN6eLOm36DXHmyTcmDPOPuASfKVIg5P0FDtOJAqK0gl8lQFzJKiNKaFh5QeHS4ID6y.mzZ6W2Z.l68DnfmdkZJsFIicWHP7yGvvbTnkUSR1zbBxVD.HPXm64rifyN4MKc08HN2TtGzeDcHgFl_ooM5VHNRgLG3c_oPt4gMRaOSvJYi7CY.FCWVwL4vC.kZPHw1l5sIAVFJOJdhPdUGosyfmgoIroUvFGzY.uef4xq.XMljet5QaGKMIHt0EoJYSapxfXbe4O2J1JK0pCsbwQXTJU9tMTCcTazOWjlAK.XTBj07hnYpKCeLxvAVbYg9h9leIeqzAEKbuHhmyUUXN.VpjHL6_t2QfsvI6uvDmmNf77fmTTQyN4y.HTtM7FPidHH9jnl6wt.joeA1mt7Koluv5mMwn0YiiHVkCGmKExivAJQvv.li5FrZH3b5FD35IArwcQi4JZ3DxPGV9iYr0jfnNX.9uWHhFG3yzXC057uAtqkBnR1A00Cg.24JNIYbcMndeL_XaGiZwA9oLNIOKCjsoIYWA7R0I6zsSSMLk7sXJ7fzVlL2IkJGuQbypOrUtdWDaUg0LEbQa2SpJn56qIzQv2Kwqpm8Bzh6b9qo1b6qYh_9Ir7UDAn0uDGFeZfCPOsDcH9CyN9E0rg_2cZ91RFt0WaR0JBGeKoMFrkhGgucxCg8VKS8cXo4H_JUdD7AeOUu3zxCRb9ENSSeOQXAZBfYg6Ea2l1.gfg5vOwCa7SJuMyTx89BAztyBHsoV6Jw1HYU5MJTDZfXHoL9CujwhgPrgd5awCgWs9efmeQQFmDqXhMxFQyGSsrGXVOAshJ4Ev2BAqNB1ZVw_BIJlq2QB12xJA8bULBbBSCtWy8BzA9EtBDBstA1VYQmnQWmhlNNTOmqm.Y4VKh68ZTtl2h472wJQ4TtKHUSAVBmuaiIHGKekI48KBmCup.8_.6p9tgJL750KNV7m5KjgDPFo2oZAd2Pu5ONHjzQFBOvbwEOoD3WHMVrioPuXfluqN19h8BPgTFbT1NtO_xYPHhJC_KfpLPWZOeQddjJUpoRr4Hta7FEzAqBl7GpRu3_gyy_jxJYE3ha5ItkwO76jN056VqDws8Y4sfonWmiPtWd8rkpwIG9IGmYIjFMZrzxkTryYYc7gJBfFgEqCHMwlnKTilBuM8SnYbYRKofZsn6IzndYbudn.XhrYnUDbMlna3Ds.U.14dDMhxk2jab7hzRFQqPlVfK.uAqnRP44CTiC3Jas8DQ4B00L_ia_Cfazqp1n1Hg7Tj472KYxbaiF3e7ZjUxJSr5dmVJPq8MapajRweCUMBXelMpj5qw8Nux5WJQfBAmMEIQmzugaMsEU0ZWRw5hRh620TZEWQ1T0F8426WS3wBpOnfX_o4v3VIf_xR2ueXx4t9..dPcpVdU7ZQChaMw8MwXH28cS8XnF5IuYQKFcgZlfH.msE4yG4zPbipPYLsMmGPg46JQiSX4oVEgBwETqBZnJnmbPcivGR5HpafbY8d7_P7BHUasuYzHkHnCZr2UEU3elgghSc7n6oyfRkjeRZhh.8RAPE6lyajLgCxLJ8l1B_9LafXLnJF_2GK3WMxSMQWU_EyEEkKQdNoI_H65Kd6rAs9UDibHP7.TwqTFdoK1VzhrUqTgXnn5Zv5LRo186j38TLp6T80jw12txYyK3T9D8_H2tBFbsf9UHkvE1txfSS80jGqYkGQ7wlHucR9ptMGB1QWfbmRqLZbiozCzVn1NqXR3aY0Lzj_DL6fHb97t_XZPEiULPXLneMSVdpq1E91vJLQh5GT62Z3ZVu7idJvwmy.obwfhGTEL4YmbkHxz644jXOYM2VM_BfcCFtiiDf1_tRTEhbsNKW4q9kaifkofU9IA3ey0NpM.MVYelMaFffHKFNgH7QTTmpdlNlw0KHbgkUs6cOveXi0WmLfc_7pbZfJ_0cr0C9g_iSz7ZK1AF7.K3t9LAFPTJCvj.8Sy1J_cyUbcWx6VVKzZKohQkKvyLAOcROSJIMoaHFYhBdjZMOBbK78A",mdrd: "FuRPJhCFJCoQrhjmRn2MtScLTZOmPieGixY52MM52aY-1739198583-1.2.1.1-x.gfvHeI.Iqnv_LmxYVVg0NUi0k2IH915u2Xwq5xUldPq3hVs.Pp.cxRkp59g85mUQB8Nwoodl0QofgMseNA5sERot5WURAymhoV34.Pw8r2YMGReo3r0Fljb5ipajh7E51V6KkHG1h8rnMM30H0tQZIjBFPPeS0aMGf.flpS89cnpurRYEikWM6vSsDy82lCpte4mjzr57gOmXBDjvK71Fj8dmjV1xSxuk5ZfFxtXuoK4dSruDg_xXtoJqMTKb2iH4rW9jbCEr_18w1sRPrhnnzja8GdgTp0Sq2ArkizzowgzdwZPg0BEKHng1lr7JnXqeuUZjDvSRvPp0QawvgkJAYrPpvXsu00wUPzPAZcSAGdEdJpdGhfcyTMdoYfusBZLijj9e2wXexLtSLVD1BXPu1t0VpgOSctlTwT.ligvaCLJSHekNcq_ZiQKE_7kw4E26y.Y5bVQEUfpztL_sFiLsD2JD_SDVK3zMT7E9MJZj8BFyv6ZnkKtQky7Bo.VfbdweS6iH6Mkrgmx7fLkLlkq4hMRLwiKvuOlLgciSPpcoHQ3DtZnCNGcWPiH0nI34fbv6V4T1roLqFsF1SSj__JHSUtMKJhz8pxhL9tz7F8KLB6FZIfuySSPbyOG03gr2tArOiAc3HWkhEZ8hqCvUCOxgasgtB9SpCxRu3n.T7F9zo40cDZZmCMFtx1Db7fdC98kaj0WnPNHWi2Pr8MPueXzIWjNH.Nlv.nlE78eOiBTBAi29FLsdXBqAlma65tAm2ia1DEzVtbBNLELANJmB8QLd6HYQz.tmrN4Q1mv36LXqJg2cQ99BqVUPkedK7nUvL79K7o5CAv_4Io3SpwqkHqJbBRF6Iy5MXwI0s73Uud7_eOjDnwtqgSWnk0XKWir2mfGPDonAALWaVnwTA2RGNHrpxtogJZtyYRzcaN4Ig.AWs3LqhaZ3MKTy0oc_F125k67GJ9IGlH9byq_X67nsHP0hpduRJVrUQPt5h7YICR.rMdPSMN99LQiTpNd3khd2EE2p2WGzf.ldxaFrx.q0ZtI6_idzmEPa5moHrC1RWe7xzDuYrwssNz.TjXcLEt9vAJrHz9DETtvxhdp8VCsTlcLcxDnS1ahkAeo7bZoyxWGELX4RxK.70Ijweteh2Tcq0h9FD24i45K7OezHl0WeN6X3FOVXnTBWXV2uGMBmFSwUf5HZadfkKuz5jSLQqGcLcnnaLMEiIubYln_nldMwdi0HrKXkLQqJnMRR6MDJm5Sv.PGTL9EHEwQtYAKQvPny8OQWORQZGjAigtmPcmAObrzRPKWZilm5xeRd0ngMgODKNiGeCueyyO87nYT0TufHecW7ZgM622Gcw4MpX0B19KS3lu8y0MWqCmiF0oPWL7RCnlBF4S6huj8DTTePlnTeJt6USr7iQ1PpDtG8_1Zv7usMU8e9jMrjWA5A5NsgdS7w7yJCof.rEMtjoyAmyiIpkiSih60J_ImvHIACG8H9JM_qdecAMa_dyjXLDiRTI3AGRThTACSJ6JqoKi7ms7ClTVMoWumgqaFZFsg7aUt7OzM5AXPdXqjGxakIOWEw30MCr0mX63QmtE0fOpursEtfPZqyWKi30IPti1nKydSH2dbo2.u1GtIryw3I9qIpXcd4q1ebFWDhHCPLReWwgQdivZmVvGoqrXimz7OuovSsxhoJTr8XN0.lkuRrJGzP2tTCQ1XTvoO_.JpR9mQm7PBj7kuIp3cyml.mFErezL75JkV6FvoickFMHAz49mR7uClMqk8yEvfzpHlPm3_oS_chEY4k2eCD2tIQ05kiWaFE11y3RcKX84pjfinmLoauMdpftbSAp._jFtpmdaIY_sKU7"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=90fcde8a1d51c96c';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\/4908623175?__cf_chl_rt_tk=j17kCpBwu9DaWBAKhP3a6FWv2daNeDG_NuC_0S015MY-1739198583-1.0.1.1-.p0p8oJF7GzkoMvCwU0sn6cZctHDAlKyohmof15B25A" + 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