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-3691427508-gov.caltech-edu.pp.ua/post/354624407565

  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-3691427508-gov.caltech-edu.pp.ua",cType: 'managed',cRay: '91012f956a75399d',cH: '4kCb4FQUc8zXygtoqPNeXKqkcvZQolFSDFGw5FAGHdA-1739243845-1.2.1.1-fQDbaARrKujT_om3orIe7.XS1Kf.rIKkyJsBsR3xfQ8y1LotLuxYCg0i0XeIjE0d',cUPMDTk: "\/post\/354624407565?__cf_chl_tk=xyCaPIYmZW66TsBStT3AyQg7okCyeinisSSoMMM1ivY-1739243845-1.0.1.1-thLj9MetosVsNcE5y_FHAKQimVgmTbvtXXxpne016y0",cFPWv: 'g',cITimeS: '1739243845',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/post\/354624407565?__cf_chl_f_tk=xyCaPIYmZW66TsBStT3AyQg7okCyeinisSSoMMM1ivY-1739243845-1.0.1.1-thLj9MetosVsNcE5y_FHAKQimVgmTbvtXXxpne016y0",md: "s_GeXW7Dn24YiHBWn7wxOq31vihBTOAX.qpRk.4rwck-1739243845-1.2.1.1-N7I7Lp0TXPycamDPZpHmPmcA6Iz1Bw2tJhUUBhdOf3ZTfPJ6txkYnwQemc614jKEqsMdp6.AK4Rq8jvyuGSKXue9515nVo3NCtVCXFesN1Eg2RY3oVM4iAleN_gXIQUPr1awY4SHgspdbOgQHH9vZ8x0F9G1jQwlMEOnZb7QWWoVnuyCEnvg3_IfQO.vFgmuiVXxwfXEFcn7cansqi5m.RaFjW9obh8E8IPJEPI9AYmjUOhlEYv1mStzinwhOqeQS38iLU2EC44koJMBXBr40mOGJcZir9dV_6U6UvnhJe_g9HZiQic0bWsKDPaYhkue42k2Zyu.Y6jAoyCthb9qNMH2Sdt2wgRRdZ5vBxDvlxFUVHx7uaFWiAI856VnI3cOR1JNRgNjMni6WZ3fTEY.95V7MyKI1G4h6NvklMMIy5jan4UVSeoQBWyuVXStHgyfWJSYUHY69XWV1VkztmCj.T2iEGDkMv56EHH52I9HtHtPLd.igJDgTSnxnxsCjC5mAfn_KX9WegzyPAUHAAs7bo2igBdbUTxV9MAHwNYhoKZesNg7UQ36Hz6FyssRlVykmRV8v_aufMAO8BF.zAE2GGQ3clXVEH112Eb0TRlu3EumDzMDaY.EgE5OX2iXmTVkMp3TfWJ6mupd5e_Y8d4OXPNXKmYr1Ucp_aupyFyGk33IbG18mSHnGk8sNNxnoBIwQawOU3GyyXqtO.3v1td9ele0p7REzjRvSVDcwu7RdLBYA6lZakBjTtCSJqChI8vD40_3b5X.TKljkhFxRMDrqkPNwle_7LTpS1yZttfUDZhEA5YnoDj2XEFJdHQa1oeytFeztmJe4jTRiYNjZXSH18ulC.YMNVEGpk2FH_X4NyyvO8HVAN0eMaEjzSz_Kqpadg8T6btQ9afByFd6ajdhoyFsZVqJJK1xnGEZLZbM7rr64rIs2.lAZSBeDwFGar5KeI.3lZlXHxf_fcmWiJ9XYatvaQQ8sPUhLfSNQ.X3GPBbGw7gUYVaEUeB1MKI5.nDaQWthZa58VweN.3cAjGGKIC0p_cwkynEQcQTLaEygy_ZZMymXkLvbgSWiT7QPa7i67FZvEt5hAMxs5aJc8nCqIzH6V6jTvsfJnVD21xubNCxfyAJogmyz7vdSz4bLOGQEZsZ9gI35sUMiMewJXqn.z1t_QQRh326K3x9_8LuLGgc4_Gr2Rj8cRWckRbnJXC_bBzHTEiJsF8e_x2kjCSHxT3WjUDLEKIryZIwX.mDCTkJJv2UQ35PKqqn3XuxOT7lYGivXtlm7PRaYXSn3UWD7965c_V3I1tDkhv9.Zpm_YKPXIAgYWCqUUVUuBbhe_POoBUhCM178ScZ0rEPrMuN_HUlegMdCumG4U11DZMj3GcUrDiy2W4GR1v1yzUGmcD4c8.48jUX2DSAz3RKz7gNdPcbmCR0xf1Cj2WL0kGJi5.dwqSyhWan9sMls56agjXpwz4m_ZeML2RoSWQXMVJ_n6Ub_b_A7CoTfiypGr0oOI5bndHdpIOpZmHByQ5d32kQHjG6kxHGv4sqEhwl7wawMQ1_YFFRlp_P.NXkno5ztjGhPCVqydbjGSTPx0YMmJMhBgiUs0pots3vOmoP5wd1BG8Vz0H7gQSSLRaPISNp_l4kLpUiG.mrNXnAHxf3Ui5eynStPkCa00EgxKCO_GpzheGJZNY4TSAfQQ3Ontah5HlyV9AgKKGjMtK9YI.ximxz0p02rW.54qo27s2kf5pfReBKouPJh1lUQfyvpbF7TKsy9Be7_iLiy_1W3T0dZHakwl0FEYXAN0atUOZTnkjAuO1K_HoKPfZcTP4t8NpG5SspSTWhii1DDtZQ9JCXMKEWrCJMSC2Vr.FzV7SH6kSXUySfEkID7MSoHbU9yKA4nYwQBL9BEZBa3oGE0HYAFdJKuz4lp2VLQ18K.iUPqjl_XHACmJH8G9uvbu_a7J8oyKnSl1Y9GREZHYh_juh6P_9CSQGdJ_JG12HIWUYWGTsbVLvtbzlrwXV9IGBiQAsEcHuJUSoag5Ix_QxgQKYE2L1RaXlaidsYYFHZtX3Rd3xAWOuty8V6Lsq0moaowtSY_oW5EgggENUN4RJZLBYg8qKHOlf9TJCgxUWTEWoulXwSWd5RkJi48KI1my8XQmpGWX4mUtNwi.YmJS0g1pHBlAeuk49clvlIgPnalogImyVP21KCAOk70gCw9Nb2Bu0TeewriY61hSKUkbKqrhas7gZ9MbrM3NnkMBy1fvZnj.dDjA",mdrd: "M6mrKBU6XORfmt0zKRK.EYZXKvHnpmS66y3bdZ3NagY-1739243845-1.2.1.1-6fgWeG7GMcF7tRL9ibkFmHczwAmKwxFFkHAKJldUeC9N_X1NmzbAtdfsIi7o5ofUb_ljE3oIuxKPR.3LSMJzhrXaB.fl8QljboglNptRRCR20thaB.OkWWIAUbOyYecEBNKlj019pYT5RJsb3W.mzjW__oW7KCjlheLBx7xnt7K1B3nFLjsMTh38Fj_0xM1CNnWbuQmhaJVjDsnU3OxWHjJP6dInI6VCkftZ1tMztWRLFpUKXipSK0C__OVx.wIUvfGvomDNnJ5HYmB58Vn0KGSlmVZiqbc0vIeUT3FUFBdo8T_VVULkivq2QDnNPKwUGt_GjICz1DHiQfh45yx6TPanl1wDfI44Mmg.fXohXauXE3v9Lttqg5PUTSbwYNf1WY9FiVVshOqVDwXCy8wzSoHPe4Gb.7Ddaa8Jt3IcqM7WHDOvQMA8y5aQ_GLJSWTMiuZIupE5QyHZSY77ex3YY_TMzrN3xqc_J_AlNCIvvHyGE5jHjqp40piVnV2vffJIvmUEj._Fw_utjhI7B2WrSBu.N9DEfBP.eoBXyUbBfoEi0Q8Lk4ExqnKpy6XoP4TrnCt.3XSER31mksZrXl_Z_WfQZGfphj5K4gMw2.ldS9tfsG3cY88UOaCHfq1E.ZWEcQLn33sUs5QmOZKd58brDU0Uc4e9LultRiegE8_Ozmrky_pOS22R4ajZ4GnJwqJUyeSbbCJwneW8B9PaSs9i5X.84mv0jwSiX2ehq0VOTvYj0aLWTLDctQWd5F9dWHEAICPD..0tL7i0A.IemfCrGEmkQnTwioMNaHE7xU1H8_0wvBvszieGy_wCFyBjJtBa39fNEqZALQtwKfExzEypTrVlBYbEJLUGvgAiDuz2M7OmAIhHXZdz_TWc6y2IO0qpnB82J6AJz.cZFZr08dNG5EKjMWcLXfx6tR.ohkFcgVCbPZUtQX_XsCVHk4O1ugO6QmF6u93Qk.tizt_50UMwyqVgyeHaCvrsAmg5xB32Fy1DXXWBXwY0UGUow6t19O6CAdeCb4vBb63oCCNXH0OGTB5NK9nrI392rQu9rQGHqEtXz8T3PUK4CQvGv1bLwD7NFDt2FpxWu0JCHM6tOhHGvG33zEwITGyCWcvUKN.GKs9C5yGIxF74njOErkVoFNF7hHT0RIiYS_1kYnXAc5SUjU3eo_rWrmPjQwYPo.9ZOQviofc3Qletgjro8XXAoUrIS43uLY6a5.2Kk97CidpZc4qzB8vs7B8yQeZzr6uIT.HlfGHUI9ygvk3LMlWBmv.S4Pwxie6bH4bQUoL9Jt.ewY_GFQinRESQFBCDpAjJLTGp6JRa3_H7x.C8LZgoVf25OnAyOhoYUJzY3Zhzcqj.koeXfBTxhkoIKU9G0znd58f39w424gX7aTCuInXJeZSXUskT1Z5vbeadtBsKfW.I4eIh2UGXinjzIjoAdbUo1HK9naWtxzXBUBBc5qmiShy65ApYlx7t6QgNfJnNcld5bSb18C1zQZ1fV.VIgSEBYkguG6rVi1QQJ53_oD0FtjaPhqqJn3RrRmNgZrgIyLyAxUlITADrtIUxKDGPvv1ymcSLoPtvMlSZwCbgghnIJZwv_ZPj31NVHfwwOdM9To30lWTsbbl9uVy7JUZULp9CrqBmf1XUo0J3ytkNYjKQk96YcqF.0I1cDutO5sKyH.IvqddWyOVXO7jBC5MaOXyyWDGcV_eN41TSxEBT6HF4U8k4wjogVA6UkSxlRoU9Yb6gwENUih.5BmGCHXIDzLbqwpy68CXeW_Mtf3PGlixQj4E8gM4IQ2YdCbqVzZqWcRfXQQydDH7IWfZyNXxBpGld7uO_pHE1MR2YYvISMkmZtvmK"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=91012f956a75399d';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\/354624407565?__cf_chl_rt_tk=xyCaPIYmZW66TsBStT3AyQg7okCyeinisSSoMMM1ivY-1739243845-1.0.1.1-thLj9MetosVsNcE5y_FHAKQimVgmTbvtXXxpne016y0" + 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