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-8291754360-gov.caltech-edu.pp.ua/post/9651874203

  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-8291754360-gov.caltech-edu.pp.ua",cType: 'managed',cRay: '90fb00fec8da82bd',cH: '993h4iHiYMo3O4nDaseeYjbRfpX1ImNGV2czRY_IxPs-1739179023-1.2.1.1-ajQuJc8duMXjDfDgiGejdxZam0Cr.M9HKS5sA7YM3qNxSUWAubi1A6NiLRNwIsPN',cUPMDTk: "\/post\/9651874203?__cf_chl_tk=jj00jKbZc4fyPLLthjqJqcuftoRUE9vcy5xFhR9Ju00-1739179023-1.0.1.1-m8FCr7ZSPW.GuKQdZ9HIlQKp2KRYvN2pGHV.9fiv9vw",cFPWv: 'g',cITimeS: '1739179023',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/post\/9651874203?__cf_chl_f_tk=jj00jKbZc4fyPLLthjqJqcuftoRUE9vcy5xFhR9Ju00-1739179023-1.0.1.1-m8FCr7ZSPW.GuKQdZ9HIlQKp2KRYvN2pGHV.9fiv9vw",md: "7yYcja16.F0BDha2X30nIqquJMlG1i3GWDQBNN2aZoE-1739179023-1.2.1.1-wIcZsqPrJsGMbqia1UgJ88V3KuKMeRG7jzW3mJGxZPpWqgVUVJsCkQuMWdobA7vLMTXzKy1hBRvYr5RNqIdyr0TBDZ8KpYp32jyjzhiLyB4TI2X9q9fuvM9d3MMh0mbq3x0JuVQznjqpxgOiYIuZtdXZiHIr3n77htzDxePsF3rrj0V.MciEDP46ytcFb2UskRLqdxFn6XNZCM8Z35yuaAG2pjp9ryw.peS38M7ZlabqBnjpf7O.qEPLlXcn2hNe7Zr7wUUZlYKgVd9FioduyCqpDxrGo3tDKDv1z4EW_zj2slHN.vGqix5O7EUU72RdyBK9zLpmBxK0l2dsaGGIiceCKP5DDkrXJUKP83AkTfjLV_pM0o1BxtQwFHghrU61aCv4ddKoWAXEBwQbDYPrj6xZg9vfoial9xSeTCsEnkouHbYfmDAv7m.GF43EWq0giSCMmweoinUHiB1TrsoK6lYNLJDqf4EmBKOrb5JV9Nk.IXZ1j0EiqyiS4B0QEyydDETjobM.EO1qPi1pWN_Y5HpxuBExikRryKC1JXe163XuTVpTNpf5xxgv0eKRLlbpb.D03b6fdjoMeiepoOzw4yNWRK.KSg6ZQsnVULeQUjOhVsO_x8fkUOQuQHkIF5GhciVElkzWHk5EexlUgndzc.6lhIjfv7woErF.2SHntxIl0wtlruUnt3L3f1HZmIDe4gHJ0E0j2jdecTQwAprF9SChrP5VaOjv6KokQ6nIFlEdX31gOAKpiXaDWwifWyAps.Rl_wHrAQHyne9TH8zDKJWASeFZO8T3bauJppyTlaj__Quct78Em8e1kjlbaKRW04KP8xa1ZOvK3qynS7RvAhEvoBC4fi6dJMEOiAKHfQeNTDpz5wixFMpk4Tnce67v4tWS3a61oZ2gC1gLBT9tbB0ANV8oQSBN9G01KcAe7hVwKZ6miFWKqZMmsGkBrmPlUt4QqjzLl7a0FqIWqITQjoElomDFHHDiT2ihIwdWIaEmI__fmnK9rhjJzN5CEAyk.gl8fkKKLgWn.Unjv.H2XLeMCpECN0THTl9uYCZkET4cgXM62xHwptCtWdmqCJsyw4Zu1QoNiOk7fQgu5f8uGKL.ZnNSpIc.YoYMFFlONnw6oUvQUwvyDNrSjJ.j2R9B7ug65Y7jPLlq00pAlvZdTkff2LaN3J7nDjr9HOK1Cr5.SiKLw55bmfr1gGrrc9usvm.pT.d1LqG7GjYoL5ogzmZT7GV0iQFqKJ_buL3wlZqpWFzTnlkvIyGVjA3wnwTWejN4dyOkyWvA4PWyciXvVZldPkztTeIUmjilvI3Mxs7L14WK4wyWWxmzfzvG5QYQbdAThTC6HG1pgNwbjoYnTDRBK.8cJNl1HCf_bYle.LVp3kuN3mrYZ1PRrJCQ3LpdkKMvnukBdcl39PEaLUi8X6nHHdJWpG7mCjxL8gTnzHCHyMluQK0cig3c4O1KMzQbOwbkQBPiUJk6w8SatIK3Edhb3Rz7tE3DqJ4LAm.EFXPGYETR1jHLUiKMftOKVOv8LIRiK3rq2UwH_Po9XXdUx8qqyPFafgcpAvcOlGYv8nT5uo0_I_ZimcqN0am.7eU1hnVbByair63DoftMcTrMU_5WCvnIiXjVFZv1vUqiAyMV6w2JLt2oBRrQD8CfHln6jTZ81j2c2lSE8FYhuc.MR_h_rlgX5HCt57nKChFq3YBypEfDdw0bcLB2M6gnwl5B1IAkzuvO1OytcIX.6gCwpICIqNyYEePh_0uNP3MBXby3Mi_Ild70WUHKr2qgzgM5Q65dSs1wJsMBqHmyg1mpSLuMhvnzs2Kl_vD30vCjuZ.OuKeucpWWFZLSXT1vZaXl8oMfpwDVUid1ltvUPaouMS5JyODHJHgvrtE9Ft8hsLwB0C.YMv0qnq6D0ZCdsokdlsGbUYWyOwdmYq_myN6B3Ir_0eqNu9CsnWQt8jkBUoZL.1OnsFkGUnW6My7DZf8xuPNGKj5DqKnOcqu1OlQWLZhWLoMi3voIV.znlYbKyrLcxHPXiQdnGxiCXu_VHyapSpFbCO.23NlqFFakdUna15I4P5dRudTZxQEC4S3G52asgLtnZtB17wD_zMSkt3E9j.L7YIT5nSaX928xNYZska59rHOfWmZKptd6Cxw1rZtr2SVfr6j0kGFVt3zN2A.nQmnqKwo3FjKpGROwaFWgE_IuMCCSw.ijE_uNgkIoSucKzYVqWA43nPC_zNIvM4Ja9jhdAj5M6ESv_IGz1QwQCQ",mdrd: "pqizrbAhuZKZq_QPtRtkz8xo3LXt2GtlS0bDelOJ2IQ-1739179023-1.2.1.1-3BwByVmMECp3lyWIZReM8Hb.pkqMcZRJlx65V0g0uCszBjR0sAGfB3iXLOed632_OV1MITrppPL9zX0NiGBUkYaeBM1hDknDN2eLT36N1NwLld34sW4IMcDCwf8IuqALIamHAeXZRzTLoZf01qBUoo1YslHqWZc2Vr6gNq9RXU1CCVObCX9pWhDrAsWHBl.1Oc8piGiN_C3oSkoEjkVrzR.Rx60HxdetbxvZdzoYdCNHbHkctRPt9qYfYa388PRN6QGoRXr6VIYQf7hTIwwB_5TzaAzdvbCOOHceVIT9r4afTjDiSwW7DzuLTyp2.PuqxUeNyjPq2kwFGQEnaJB7KlXKvz3uNNeP3Lk1AMuJlgXd4m8Z261lEoNYwwYCB6mUOa0fWS3dE5cF5kHdGGj2P60FHcG7E6J_U1QsyCl4yWr_rf4APF.cChAd4hlx3Dsq0nabLW37P0yjv2chIfflSW1h2objQ.yfYuPe73NkQx2ID.ZJY.Zh3x4vpkR2A2ZpaxzRWHD_okicyhadlUroKnP3K0ZcFpuxskmrGdcuo6NFbEyAOk4xjekDRRUgcC0eL7yv3c9OvRrGMXfgqXO74izsDIp58ADL7tZHu0jGvCywVE578H7rw.rs0BNPtUv0gtnG.O975_ds3BIcTSip2DQYlgXwUeWBWIDoKCKc8t1Q.Ncm5RKjGdfgs9Y1.NavX0TowZwBkjuTPZn_qFbdQwxykDUlXc9OnFB_6P0z1_Tk5c_SmG_irCQNfp6ZxqnhrTF3aJ3tvxLMrrz0LzR6Qgeyo881Lv_mhSE1AxHH1s28CppsUxPes2Xd1aNr2SANmlk.3.zDtYLiLvPRdD.eEgUuF5q5rdiq4btK_NK3WD3RH28enuw6s0_tuV4kZ7vzCZvNY.NJ9UJ0Xp91ib54uiOKZ_pcZZ5mQMVkdSVkLlU4dVJ5zIHurOE2zBX72WTgD18iC89IpVSLAAqD9z2V2DtT8Dd1AisT5DhNTCUwWiKzKSkirlls1..jUAuCZwOD2slFGqIvkeRyDX3fcCfY_K0NiJig20DyrLMRnx3jQ17boHso0AAIJGBtDP4360uP_6DuolXfke1JGCyzctsWB5xUxNAwXZAv.1HYrRPVFThojeIXHM6vMOoktHZBbSvwZJSXvv9ra82Gd2NAj2WBMWXVapxoFLp3MNytUjG2rjBW7rsInxzMIMHTpwKE1cYNglvspVYTRTNmtNDSDOQPm0QaHLsSMHctR4J3EQ9xkD504kUuxl4hkXlKTFFRyJEMSorYxjEp3STUmwI3eBV6.3kjZy2g_6qzggBFYgABSa4UGXPzBp5hE09h2Rp_RK.f6TzJbkXClPiuUrD9O3jzDtFxeu9RGfqJA2cIg43QgztQUebK4qelbHmRk3kMIc2fHUNzsKIbnBlsGZndzKNBXqFPz2WCU47dvfmOqT7DW3_WBnn_87NvWR4FTvbqk04jwtS9sUKAjzXmw7M0LkDIwYI.EVlYXgKxP_bZMPg_vT3ptlOU0eJoGckpPY49Df_ZOBv79ybZfmn.qEasnOJe2Mxgw5nMVVqxAxr5HwPqFMbvvnN8U6V16vcIpD3t8FV4vRQ3pLNrUx7G4ayMLOr9fYILeeTUPWj29AgS5kK5SHwx4VnugarvLs341PPQDFJjsYFFoLrAQrkjgrHj861on1ZZR_mYc6ZYUMtD7_P4xAK3tTVQrHSDqrbVvOPheYbrJ6NXROz.WDWoMIk0wQg8kcX7yZgdL3VI0kFP8Xxc9ZPeIuLtaBkyblsPXvPQqY2O7Be44VZpbxY6sRe5hRBYL5bnWxY04rdLoJKT_wuzvdkGfOsazSwD.3kxkRf_uP_g"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=90fb00fec8da82bd';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\/9651874203?__cf_chl_rt_tk=jj00jKbZc4fyPLLthjqJqcuftoRUE9vcy5xFhR9Ju00-1739179023-1.0.1.1-m8FCr7ZSPW.GuKQdZ9HIlQKp2KRYvN2pGHV.9fiv9vw" + 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