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-8576201349-gov.caltech-edu.pp.ua/post/8576201349

  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-8576201349-gov.caltech-edu.pp.ua",cType: 'managed',cRay: '90fdcd835852063b',cH: 'iiy8OkmudphujAa2i9CWEGlWPjRhLEbuLVKiAp_V4cA-1739208371-1.2.1.1-FcKSFpxD210101sekav6NTnAAx24OJBeDdankcDk1Di9pxVqMNtLOL7uyd3khk28',cUPMDTk: "\/post\/8576201349?__cf_chl_tk=k6EER_r2AumZE3jq5X_1LiNP6H.rs252EEcIOUEzzXg-1739208371-1.0.1.1-aWEZuw.YudcNA9V_OKxFeq.zZe.EyqL1dzkRXX.8grE",cFPWv: 'g',cITimeS: '1739208371',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/post\/8576201349?__cf_chl_f_tk=k6EER_r2AumZE3jq5X_1LiNP6H.rs252EEcIOUEzzXg-1739208371-1.0.1.1-aWEZuw.YudcNA9V_OKxFeq.zZe.EyqL1dzkRXX.8grE",md: "ZNU3eKU3Y_ZuQXbrS8n59VyIulwooEDZ22XPJybWBDQ-1739208371-1.2.1.1-qIIjD8REZ0EueVbUY0126g1clrheljYaovmbtBzNNJyAgKKMg9acvPkRNHKE0.DAihQdisrB3tinV1BPGpcuaOxI0RiU_kTv4jjtHNArOVNfKurgDXxZ92g8RmwLrnUAsKrzT3O68WES06Vl9prh1T3IiEceYRpab8EbPFogHbRQ3CISsQ.kWO7dmIotVNtqwTXAJAT0En8vi3m64AB.D1OEzwISTF0uCYzZlq4P4yMgOoZYF2nsl.iYSgi2dtL9.f8XrgIRjYUPoGRBJfEFjO6.zat5iKNbMm4kMkGqBqVjT39yNmD_neE6kT57mE4yfBXl9b.3EcVgvi6xL1Ah.lHgSUDerok8n239_ti.Wtoo.77yRsybjwIeJ3g3kaiep5xRVtsDFXLo9eqtSyxqDjZGGflCtLJzTy.D0BClt60Z.5IH4V199E9AvBKYRsZXO0cnarLghksH9XFNeONgFEL1BaSrCFg9YxN5B7oep.ymwGuqERyC1gIk0jNcFac9OJEHNJrYOI_5O5QCQAdF6m8kA_EgCU26OhtLHz_lFE3t4cM4SqAa4iO0YisXRZ34V1sP6oRg9gbItVRf77PKqW_fRXlyPATUk35cYqRPINedVmkX9Zd4pHblKClAPOznoM4gIZTJdSRBAmeMTC8Pz73DVccc8v.oQqyl00iDIOvY7MI.5_Gaq7Dv.26uibnpGKZxMEi7yh61N8i2Ev5RaZlbjPCGHzfN2G2xhI7DZbFVPKbkgu9Bvh2PcJUlWKzrGk3WhaFZ1emMFpZNxCRxVmR0ouIj7bScLaM.7gN7wgeNzI77WyHaQvpyXOjteTHjvh2vEKGyHvxUKdgDmyE.ZOZdkQuIe_.5xlznf7zv2JDIEXE4or4d0yxDzGcMjVFvTYt5vRh9nJDOnFzInsAeNnGgd7erkVpDk0eCaqo7ZO2ELZ.MhW4.ysW8tL6xEb8szlIqiurC6QC09TXMeEo2WWzunGGulXafMudaugef07OOX_qDSveplC09dK8IZ1nyE_wEBdbGVk2ThsgupCKy8yMYENP8l.Z4pMAbMj2t0TGqCKwfuMMtunWmDx.AUUF3vOO1nONoItwBiEgvKNFWfhmAT5.8P6_rrMG5RsLVNozCIRRrzaUK4LALUARdRcRVGGY378TsGG_eLvHH17sucncPeFolbYyNAw6txYUBq2NS6fQbeJMFrEsBeM_lt3oXuBhEet6vLL9GvEf89Qv.iMnN1NyFV4jRDq1nEoO_v_.FVkJZ1oCAkDb4iMosADg2yba0z1wg29TS8CmAWYFY0IOn3Yd2ksgPAbBTbviRTpuOyZCk2GIW_dxmkaN7ntGz1Itx7phRGBcXnIjU5jHP0scObKNRKJ4I_3O7TF.tb6JMjjhLF1KmtGmda6RWL9NyTJkCkRJbjY6tbGK82TsMxKKPRF5zsRgjfNHC_BaYhY28TJGNWmXszIAe6EU7qJpzjBKjr20K7hzfm7uICFsnsMdAxcsf6UzNtAyhfk2vhM_GYRJnSdgJ3QXR7BVZ0XF3W6ul0p8E26RP8uJka87e.uPOLhK5vSdxkg4SZCpGiIr0xBV2sKNCFlHOWYFl23qvmlD_IFdehzxk0tZRsN7DIVyjYx7t92_K3FfHbnnmMqpKtnAWEwiVWCE2M4JEah9RzOBaidQG.E8q8iQX_HzqRz4pNxARrf5TCJ14DKGUb67dp88aIyxOd6DPXOJeC3H3GAl6gBfjc3xPWFtrc8Ej9WcU6BZJIODpak23MCPk7K2RdAKMCURz6tPsCPrBE7xWb4TWQ4z5TUK24cRm106tln5Co0q4clsADqjThKxnOaqr_39TwElzgK.Qe7wcs1eu7L0ZoFoT4e7oEmIkRhzmul42zEQSNAR0Rb_TBqoiiVCmf2.1YVWdK6U5DcT.pZrlR.sEQlXEQoUchLRZnKwzmvtpOIZP4A2CAG_W3ohyA.BTWjsShMJv2VrFwGgEW9cLMzzyZsuSPu8BpzuUB2pJ0Ci_kRd7FXYJArIXGk2UbzY0hzcPm75N8Y35WGP3FJ__XAkS8kB4vJlLlqa2N7FhvLnu.gl4K9f9fUlrHfFa1fQHB1O785wUCvLPI6VafseooE1eAjhzBCJZyszA1ti3LTzkDRcubF884NxvHojEJk9OjHyzsuxp5zTcDQuiyFhur47U.a7u3pMhkzt4eZV29Owx7sTlzruv93uqM_rk76laWZ5Y5WV9nyA8Wn7hpj93wmbUd3G_M_jUPt.qWXjJEg",mdrd: "MBIZ5Nz7RFP3bbgvToGC4qDenv7cYHwv3MArA4.hLGs-1739208371-1.2.1.1-RihB6iEnxjnp3O7VrSkndud64.ZVAK.W6kRnTADMPUWdZ1djIRfDboVNRgnBE7_icDip3DVX.2OnVUoodIU8a6MVKnS_pjLaIEtnTwg8XUqjbv3Ey1.p45auUWN9hDZbZvunjGGCHTByHUJYCsKtrdj.hDJefRAYcrFOfsLW5Sb1W6VBmZ4DRHg626UEMPcgqFY9fJJI4M3yjvywh3sGy4VVDo4NZ8HWOr4Z3NV0ZzuAO3.EbFfCNbizpUlWaqilKo2dFsfYBW0AUZ32.0H8g4h.sgFHpvbGIplgop9SDvsaectpuYghrIjQZJhWAuh0ftx1hw.wFXyO0O_igDPI.gPBByFLNGFJSPgeApjw2vVPxD59eJde1zNqIV7ZPKyitHlyH3eKvICT6sRhq6mTpdAwHzRCvvR4RaCo1vZkVCuEFQxU0aSt3_uDKfY509upsbM35lnpOM3bKpWTShjg0ddEpSBSJM4KJWnXb1aWVzor3L4UGlMfj1MYwPzTkgtqE6.vV1Khk.ZEaNYiAR2tPCzbBoqeS6ycqiTEEvu986KMr3wQqqivLURxQVruvnsGoMDD0Jv5UxfaHqoZCSsIz4f.uFYvIbd8I.VBH8aC2ltC7AKGRh9.68roKfOGIpNffeMLphVJc2as4Q.6j02pPHvy3LSDzGUox4D32ICe65bXxatBa7teg05FBVWmx3KZu_SE1lskv9WBfICuBIdgqX6FzUa8Q4anOduALPkY1wWmTTEzCFkw6JvD_3P4DlUqa2McPVMDwHJJUrjcakIBduNw1nAGFTFaDfhLMC7UhEzagBsFWzdzp5qaTzj0WL5B1QPNOG_g6bF.dI7oxDvYj9DUq2biR675A.9Ag5l1KuwSML.p6DoqgAseaOxIbDivkxRcN_ZWkmuTQ3eQmKhtciVC0m8rls73X52pBAg5i5KHgx0yrhzBEOJ6lGh40IK1Ug6tdhifDaCSo4QiweEyFsFf0w4h_B1dxxyB9fGa0MvVxlUGXvyaOj6HYSITiLL20Z3v1NUKONfcV80AvGtOa7FoqT5X1nZSXilsOALfG6lq_QnQtoqLzbuvnz55XZXx9WWfOVZUpfUg7jimmacFEylkRr1v7ELQxv.Ab_QmwkO4wio1dZAicLk1yNx0I6WWbp8zEHs2DDjtFYFvUlZADu8a09cXiHAtI6sBmlLkdunwx3eqUHnqE2Co5em3JCHn0fJPlmoxEff2txZA35hYXycOX1mA3fEtMbrWYmOHC9iXn4GS.zdvrU7BYFtOv8i7F6kBqdCuu6pcQYNmDJNz7SNEDmLsvMTlC0yvkopjzkKp58hThg1KHMktjeOSvOmXew_6g1yrgivbaeRoE467CnLVYU3F1sROjMTn4GZajQl67Wqa0tXcK1MAL14Q0p5IDU3mmccWf5MeP_PYh0dwmhWIYFhhdtvpTRhUnyfFOoBmbVEydKNULp5s62WHsLa2WFcd8Sbj36_FrsdI7wgWrT8fjOU2.7bUMrt3gyj.jGsiTaQiX5kPY9mTLCAzdWm0wQXnVacyEphM9.M7xPzuEj7rslNAFLCZR1yJTdvusU_u0BTMv3AJ1rOBGkfnBS1hTjBKDPuUh_el4_9lhakUe0Uj3arhvXDDdtPSxq4xU28NK5glyGWIheFXsVeLkCDLfMU7vpwtH7ju_qIDdlTbRgzS3BRHlGH7utv3fPTa3sNQ5XRQapdXMyThe0nht0F.ugqhjLaNn8_PKc_3hN1J732VocP.wqMH1pWIFL5HkJe0ZbXOumecEzsUIetiRHPB5cvU40.N29jmfkW8vhoTPVPKZiassm5mCeOUMWuhzsI"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=90fdcd835852063b';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\/8576201349?__cf_chl_rt_tk=k6EER_r2AumZE3jq5X_1LiNP6H.rs252EEcIOUEzzXg-1739208371-1.0.1.1-aWEZuw.YudcNA9V_OKxFeq.zZe.EyqL1dzkRXX.8grE" + 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