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-8645279130-gov.caltech-edu.pp.ua/post/080509529912

  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-8645279130-gov.caltech-edu.pp.ua",cType: 'managed',cRay: '90ff49fafc34ff15',cH: 'zph8WtkqruY5q2jYLk4jHsur4c7brs6k693KdWMjagA-1739223955-1.2.1.1-AY.DvdBJhhdckNJZRtXCriLmKce8aX8WzX_mNPmGbwH5VWfv4oPbtBEYq8kyNSFo',cUPMDTk: "\/post\/080509529912?__cf_chl_tk=X3AlkDRZrgWLZx8g8NZHtUpZJtKojb758k.SMHzc0gs-1739223955-1.0.1.1-_ohueX8exQCOZkMdhwHYaGBo44A1_Ud4m7SSc8lszR4",cFPWv: 'g',cITimeS: '1739223955',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/post\/080509529912?__cf_chl_f_tk=X3AlkDRZrgWLZx8g8NZHtUpZJtKojb758k.SMHzc0gs-1739223955-1.0.1.1-_ohueX8exQCOZkMdhwHYaGBo44A1_Ud4m7SSc8lszR4",md: "1dEyLH4Za0nxhly7HlSczku8FdmWv_bOCpzngojkaJ8-1739223955-1.2.1.1-5S2ygSaAZj_Tx30vULjbeGVHp9JYs.b.Y._X9pMLqA76TfsiJZXLtfo3vC8oEEx8kF3dTB4hvHH2v_R4b5o9Ees5pQ6kfHRklc3XY8Q6DbqPweTbSc27r5.7hFpK4XQPk_YGvYI1dfgJJWU_NwMqSiw0EYVzJDgLCs077AivSxMCO84p0gGQKGqZsFw6sl7krX2r5pOVlgYJ07_UvQrQ.SjtA4YnhTnEkYsADITthsmHfp3acITZxnEPdAI35lWZ9K0ObcY3h0iasUTfCJ_O0SU.jne.tplEFipA2oICRKWtr7vflAzT1Xq1uoJCziEd4LAGOare5cXSsPYYOjo8wFT3zCy6dwpY0R81CUvXA5aqob0XQDSpH.TKfIKHQHk_dgU5Tu3q03atY9NetX7UyWFrbKKfkXdpvlydQb52nZwuGTkUts01MXL8IAtCxfS_bk2pbCAziwyS3GVsIl2jLj9CvWLAX380VzdCthopqWjDLvStKeFH20c19dXaGIuBdLVsqY4d2XbUFx9uazupWn05rSiZhaV2XfZKTofHp_Xbig6_coAirMFWnWGKx7_SN1yrv9mfbLeKU6RTbtqNUlOZri5B5MTUU2GayZc5gWoIsPQQTkKi7ANJjpgM9KU7DD_qbpVjYsEvNqZSK7mVL.Ekpkw0CYl2qHUH09J5ph4m.MjbUiZ7kjgoC0ng2Hbl4fjJKDZxNxPrnIf1.lv2VC5LBUTOfjsYztBaHVqUmmtMsgMPfb6DLVGki00ie8hr25gEENUx5aT1d5SHxTQM1Lihc5D40NKsVlgB7Qfe5MgosnnSMl1LDidCVXHZ1AG1.mT6p6j5VTAHpBTuLJ28SHyhn7VgIdXM0FVWxtpsr4p55gTwdCSRVOTnAXj5n2Zbq91jITAae6Pq7Keqd3wfOrcG5hC3kbM3C2FcArd5j8ig8RRR31vQw270vAES5_lKtxowpz5mL5vAwmwIfe3fpG2MbS0niZIkeJOC5cDSf9A5aVZNi3sdGwMrLfAOmRildEyBDgmHNf5ML0xD0fD_lyeBbcAoyEoROLiFHbEQeHm.wAzk0ROv4bBUU.eDBqwH752vSTE7e7vqr98s3f0UE3dXNOkPK353bDMi_KPAGA_.CnmXj20D3vJtDFi_2mvgcbavZzak4vmFPL.TmKEEbLvgF7EeymGboEjIjJCXKfblWunSlWdqkABQuU4vfWncQKU5fQRAGcnQYkrsP7yQuSPMclcVq3NurQ74t.08xcZvK3A4BhkZ9itQqTz8f.WSgsKXdOh5rxiSrfXfjDOr7lHKp5MILD13JsIYm6bhLM29TmTpB6N.Zy7x21XYuRY386xE3gqcniXoUsR_ZzdHslqZQcd8GFn4iT95FjfQ_eY5_FSN2lkkyAmJkr_a8t3W5zokFAHXqMp4qoaaZCYTbnPLKuD5I1OT5E4tEBK1nGFweOl0YrMcQaXAdS0CgvBc3leqBBRUMJkuzTkFykL7ZCXfww12T803tmDIh3eunPb3X2R0Xzb2jmCq6UeGmQ8iZTaTHVTZ1eJcH7rRipYZjI2B.tYI79tVkO6uIaIRHizCfrvnBl_wNA_ZqN7O4hkVFCAN8BhlMmydTMmIt1EhPebJqaeDmwHKpoB5v6hB0NolPG5_r4C7xJcvxwh5A5SMNW_JFYhvUfH3kqeKwM7ChUb2Wys1TNrwRdiZCcEKKuWabSUgVoOX0EBcggGNzHfj_AB_34pwvocbsZ232MoTv3FvhRCGV1jeilavZRvFSTEzllJhFQX6IXWUu_P_Z9IZEwqGocm76DzDE0NN5PDRqv9LFxsYnqUbupnWvcGb8KSg1UBQ3D7E_3vRbYAVifcWptDw82TB54RDffSbD0QrIPxSZgMgRj2dY1tRXyYmMSeog5srbUNmjxP5SESVl34tygY4zBHAh1GDMSyhX8.P8RZTcoLL2KGUiDsrv_O7a7RsXhLPQ.MgsYFAe2Ms7Vzko2ANz18.ehGGnMJJ0YqD5T4woJYyuX9LKHk.LD3qq0bb4byRiVf1I_f7UI2uTopQkx54hs.hhTiy1s7D3kEb7D9Ulij8ustB3GQLgHrx9zCKd4mNtCbQIEYyLXPSdr5kxHwKP4HNBYS64p0ddgRNFDImcI7a9iix.x1k1Ak224c_HJUuY2RmRzv6w.0zBJEpsq4Ys1mEddMwSItyd7XVBFQd.m77UeiUh5G9khIfK82AN3qXB4cRyIp7TeDmMdNFkUw9sE4OfxPfwoto4Cko3g",mdrd: "8_gbcdgiKbqPPbjItGZqJnLijAwWDxG7TaCI1wPyL5Q-1739223955-1.2.1.1-uvXrBBrnkxIZYQhpdYblMonBIIM3uN3BCXM7mHdM9tsXzxwW3sdtmTvWuu7kUWQcSvKnGZ351Wwh4skh7Zm5ONdD53DrgvtxwDnnB6mL82AqnwGXINupFz6h38QqoQjZbhSudVwE0YfgG84R.57ql7Vh8eMByWudwb_ZJSRYPh.imRjsFInTUld4OTvEAwq5PU2RHKitzVXaj9.IRKwP_X3XvcPfXCnOpy8lc3JMK4CvLDwWJ5gSVCW1ac_rpYL3gj6vXIiMSjVSLdvfDmciUYrUpCrEW5cCXqg0L_QJiceftgMMW0BKGbey1jwqrINU5vSjpJp.HF2rV6GI6Y0kQ5R7BZSmuplN91S.R7LNTbMiqzxza6koPV27KKho6OvPTrbpV.M9Kr0LAn1WuSIqH0cUQcZicVQ8aAq4MikUSDsvy32sZp9GxKxMeMfxpEhT.4uaVtf1aV636Pl_I3R4Iyqy66fM9XTJWRK_OtYxMlT2fvynVlnRJ675feR_.yqizfUgCwuiPHG.PWmaTvg.Y_h0do1.P6Wm4GDWM.4zuXIsCNIhLmMoAGfoUmhngU97ymW1vtMGEpZVPl86zPu__6p781_fPdrn.DFF13yLwlYw0v0g1BAm1pvzbeqHl50I7wEd8TmnxZ9KVdoxB0MTBqGLTwYej.4_PxXdvPkN.jMiFhvbvwjRiUF8G80SVroAXJDoqWeiK4H5ZhDdJJtNEVn35ak6eX_RGR.LoicrCey2g.bkApzLl4zPBTHxYk_uDW2Crz0FlaHig9vrjKsyeB2xcbbY0NDnXvi9oaaPffY.Rp5lhZWpMLMHGAMVEUq7zMMNe2o5DQnt1uqFOnJO1qeNi1TwX9F30Ooc8iUirkGKTyBLxTzJbasq5ovE62OdHLdeS05S3lv1eV7ScX8R7JEMWZCONgl3iMr0_L85j91DXCiTfUjgDJvN4stdcedxeHATCdc7MdjV0TWR.VSP3V7sVc3AWqrbsPWbFoBnG8VXQPB8YFbURsgtB8kI4fuzHDgPh7zEm5VVnFscgUWtSqIDpq9B7Kkb8zikCzIZqrx9e6kLFVNLA4C_LEoiwCEvUvjkuuI46WFQTiDf4bjtHpFoqzR7UDwbN3KvYLDS8XkzEgURTy.MkF5BgK49nMgUq_I_AF4iIWNqU6PdzYjJcTc_.v_M.tN6PnQFdIAZQhndIprK6P1fQVTZ3q_mWiJegF5qaNEdEKX7ECc9Qg9yfjnExs8fENUJcCAsgeeTjRgkz8ggSHnh6jlZjgxIlKyjESCtWNtlK8nkbKJb93_TsQ29Gz_DxaCnNU5l3tzSZNHspF11py2DMwHlQb7ZNvqL4o2sGpbTKS5R.yJG9iidNXQPGAVzuWMmTYPCh4TdOW_WzjIf4feYDHP_sQnQV9gPamAjLRfIVjg20zoWLGC3CZM0Av7fI37zs0.yBMDHVavec5mxasTXDbj0ppK79BW6LTNxJU9qGaZ1yJ6hwDOTCG4bxkCrO8QF7S1IxR_UcGeiKpG_e1suIwDAZn1z1RYXq_3ipBx3Y9.uY_fLr4kIATQNRyxU6k3JwmDACz85hna15RfUViNlfuG4O.Z7op.5OmSxzY9NulErLT.NQ0.UbCoGB5kGxxYGU1Ttz5IwJ3p1EQ._BZmEVRXpDabpA6ris5V1D6ZAJmZloPFsPB.3u66LMMypxnWV_UBxy3GOLJskT.w5uaFjowv_yBz1AHUSGhk1xIOeGGa.ri3fJ3tOFXLkIlocVsbkB030Jy1rzZBMlgw8lkJmvVK2CRnJ58AqC7rMNqUdMSZis2ML_X0A2gG.Lv85Ui1jJ9TSCRiPkyIjHTA7RWpEZ7Ku5TAVqQ3."};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=90ff49fafc34ff15';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\/080509529912?__cf_chl_rt_tk=X3AlkDRZrgWLZx8g8NZHtUpZJtKojb758k.SMHzc0gs-1739223955-1.0.1.1-_ohueX8exQCOZkMdhwHYaGBo44A1_Ud4m7SSc8lszR4" + 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