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-0872619435-gov.caltech-edu.pp.ua/post/300566799115

  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-0872619435-gov.caltech-edu.pp.ua",cType: 'managed',cRay: '90fe879ebcc2e82a',cH: 'GoUjsKLJr2zF99ASVuPWwt_5cBvayoF.IIRgDjq_ciE-1739215994-1.2.1.1-J9y7_C2sI0sHYgywmEc2gFpGMtx_qwCuzqwlKa4Pi2E2Ag59.OR63sHOovbf4FlB',cUPMDTk: "\/post\/300566799115?__cf_chl_tk=ZLTnnbMB0u8kZHfhA4xornlXbMn2qPDzgH6KBQ7OecU-1739215994-1.0.1.1-pwP7ISF0R_w0XXkNjOXajBeCtsgoPEuqQGIcpU19CdU",cFPWv: 'g',cITimeS: '1739215994',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/post\/300566799115?__cf_chl_f_tk=ZLTnnbMB0u8kZHfhA4xornlXbMn2qPDzgH6KBQ7OecU-1739215994-1.0.1.1-pwP7ISF0R_w0XXkNjOXajBeCtsgoPEuqQGIcpU19CdU",md: "sjHIYgs2PkVTSAED_n.BaxMB8aeBJd7Bvnd_dSQNLac-1739215994-1.2.1.1-numlPXrfmPnbgtt20g8Ol6PR9vpdI328TYTit7DF98mJgBaGaWMcJuwiARWWpREAUajDATDszJ8vy8W0xPaTFBQC3V3vE_PUPevs.VWIyBDsEpyC4_Efmmtesm4m8zAf6BqHx33IcwfosjzTJ8Ou2bd5ItHrm5YUHkjpX1fu6LNhN3IrQ3Kqi9UEszojlYaEwPxbxH9YjrEEBs6j3vdWrms_pjNsL8cmTSCufTIxyCUF4qwNS5X8UzssxxtEX1uLWNeaBtFEY2KpyJkL0qUZo4K9332M9RR3VqET3Ix7ghACnBaA8AY9_Hwsg_av6XemFM_ne6b0KfQ1GIXG0fUIJPm.ab7zGETIKJGF4ZdTOaFtyS2BztCRYTOMOYrww.I5EmUQHUvof03OUKHnPudUpqxmyFcW0Z.xJyToWVtW0e.EzHTm1xheMtiuUAcEEviIGNzxz5AZFwAZ70IFkeBxnl4w7D0TOJlDfxj8Gi0U0i76frStJKdzCzejv3qJvORiuYXVN6lGVg.hp4C0zlNN_DFnRIR1T0Qj6NFbUfDuVi4L2xh_tjyDNfVUKkOsZQkLtzmGJX.h.CcK6TSmM69HjxliiaXeyjRsHZR.ynO7CRhyn0e2RJsE2CP3uPfSK9VYNmFcogql85thoavzR1OdQ0uknWQghfe7prPdWih5a8AM2CAIVQgsc.p3dTanKvzhiCM3IEGPUXRgDFGGMaTre7UdIqAl8qBwLDCQQvuKbSKzaAeyhcgPw3LhJgZnoCOKlER.osWCBjHYnMo9d.OG6lv7qEuhq2hlx_KT8_9vQyz3RMgUKUD.r0DD4oaMiICHbxUIR_Dm0JRsZWjxVTOzSXnbDTDpbKejUuoBX4vOd25XD9YhLsHzbHwXp33Z96WEGHz76M3O10celxpMgL4g6zWwPzv09vWPG406vclRl3UQ2SyIe4EBwHRuqDoMR5WRLnRoEyCi8IAczcILKXXsSJ3lJPo.GPTFZL5gbTi4yd6n2KNZCKPLIFlqKkD5Hhi8X5dgsHMxdTpCRWIoQNvjTtAi3v.awlRz2U3XjahtVrVCxhAlOzfe_jLh9DWt6SsUD6GHCMgSFPeWYrBW7vjKD_cicP21cNBFlm4PCh1gr9XUXbaVdJpXoPu_NKZqBWUkwQkq_6bzFFGnO5JMoWZN7FKZubq7Tz0va99UfQAwtCXfPLMMs8Owwo.4BCSSGY_wIQOklA5Hzb99vnPHYH3iPOea.yy06Qk823WsBIiXGwW..lm4NcCgQFyqoO91Oq5mRdhV6A3ldWmpq7IGDbZSxp8XsC3x7vQCgoYQ9XmUXzzzA7Y07oGyql8r.hdOCGeFOFEltxW.QZ3jl01LMibyR60IfpdoTamoB_MsnhtFfE2_JMjANc6R_hoGv9hi7_3vDUNSCYYimk9ENzgnM4j7fFcQYiGALgRLfOFx_1azfsYWQsS26PENLuyhEPThgaD.bptO9n_DnAbxEJSqxUsV1RtGUvrUyzXEq9i.9OumwldEGPLgv9_JHtg7nfxIZasE2YKz8C2QDCk48usD0oSgJdRBSg8QdBQJ2zuKqhSNUFXAKkmBUB2WOjfRbKJ6Gbr2Y3_Pa3216ZkxHCKQEZidO7._3O0jzpbT0a_WQMSg0EqzmnkMewIC4evy1ab1dyQ5hSWSjAynuzNRi8hto6cpuFaJRmFqR8k_Mp0EAc8Z95x_C0oAe6MU0Cqp2F5h_y3Eoq0EmUQx6ko2Dh6wITAbCvzbOhzWD.Jggj7vRU_pZpj1I2AKhEhopkKUeO9i96FtOl9o_rLQ9YgTpnABMaN1O5wEZ1cAQVAw0z99lYHjQsYfeUBncJcNvYsggk3cH9iqyAU9Ti4SB.4uZnDCZ3dc7o9nk5Y1Z7Mv2dqPIf.Gw5qIHsnghWFytov5NWCTEbcrNc28erkPGYvq_I.FY2f6QA6YaZnzxxsdWsjVOkxGNvHpHaEjzhFu5IBneeXdXOjNjxmtTKZJ.tOULWzTZrQkRQBzGhVoxoX.ptkdi5ivIABL23n8IxFqPH1WfYP1A2bg0SPwNimJ2DGvT8E9j6ZSTCeoJVfZWwwJP85BnGPqJgvK3tfcdVGs1SL6ksxJy6eCUkhZ6ED4NlvTmTrU2fLTFfpx61_IrYGhou_OOg_5I4PsT44oh54VjKwps.0QAn7XCmrwW5GMjFUYRG0i_xxUOG1e_Bp26hOjT5Xczuxx6DLyPv04YiLhHebsQiCZ6.UItbDBiGWQ4EGwrM5tFLIbsg",mdrd: "Y4aYVeuC.oDr4mOQrW74HjjPEMO5MwTodNFzGB7IEYo-1739215994-1.2.1.1-Gzw5IbXTMpc6XKzWzHhPDNT26y7IyCj7f0YC0cYNtDOw.tTIND7NSsrSa2rPI8h6Far2izeme36hSvddZrK7NErc1AazRYayRW5oty2fKEmfFXnglbE85nwFaymi7C7jTY7s__ynVN3nNxnDQbadQt2JofZS9sjf1ukQq9D2c3Pu_dtKVvXp.XyR22i2lvgd84yCRnH6aeXyMQ8hqSi0qROPrUQnTMBH5NDUyF0265ZEgg6kTF6IAxUgfxT7CJl.bt1ZGuYA6PQhCTzjr_P1osF4S7Gt9pZiw9qsNpdfvr84IQ_RkLXtVONp40JEnOwmZqu0IPdi37yJFXdlgRgXo1_kfa7GESC0w2a8DMmQHlmoFmtYIWwvK0Ws4OzlUNlKP_AwFgczeD49aJh1a27Pxb.5XBGQASQfQWqd7ckVKZpERL9peJFv8hwh8UlfVu8rLsr7duPqJhYTQc3BRe2nWJmBcSrqE_kff0NBOgDoVHHhCOEXQtpJIYgRGnmSXHIxXmqO9BZ9WTOESI59X9bK5QH0LfRU085a9lAPpClFyEr9B77QZZDo9RrfgjwWq1MvPUH8n.fpCQP54LDIzqEI1NcL0Gwsa5FlhefV1c34ydqFa4Alj6aEeZ9qkRWiSzirQxH14Re8_E._6XWZ3Ygid9fqEBjQuSX8TuzMQ0glXZUHkFML1h1xC8GdakBXsvjDcIYlEDSmInARZ2_FZb5yJg0BiUAEP07KB0wdzo0EG_PFNT0moiQxuWaDjFCV3qtB8JL_JYslUoLXBh82wRU9omWKHk1RUKNrNh.2iSQIglcp1XDCVBhLY24Q1WF9yHN7muz8N9jdFZYFgPiWIjzJ0ISPhHqEn8O95_Jaap78stqh5.Kv3y7TEGrjpA6n40wBnZntWShyKNo6ddaw1d7ZydysrOA3HRPtnnU324T6d2aqDspZhRfE3HOFPDMkeo78koirISR7f6cza2YjXxqD9EZ4pmQy5cMs6uRuyWzoAF2p9ge7fr2uk6ckmCX91.RfypSDApwXccJG4BPN7i6IGR.7R4TGp982oMZ5LyanDi_u5M_IdFvjWnS.W7nhTuK0HGibx6WmryJTvrgbJ3B8YVuplOVuh5oHHeKpNKgXJkQBtN9Y5mP_KvqLax_WNhCrR73irLOjD3t4fNfpEd1bsmrp7gBUOco3qeKGo7TuvvYoCWmUVTUcSJHtpFsSSHB8vEMCYmxAmnxZmeWGOTHnQScz3eNduDJmNCTVE8VZHmaKtBR2TZpoKQL.mKN7wLPThGbXXUP3IdKIQt.qiu1xhd81EAKxMxe2vZizk1a5g9ue7upkhd1x5zVFhjizCvzzN1_JhjR77bDr.uBpmmsKhqKwdHZma8AJJeOIWrIW74dg1AFpMdHuc0gWDsZhPgxt4PFCzT0WuKtKADpKkkknz1lhL7hTMsrdowICnJpSCg6DpU0iK4f.L3DKX66sj0TAASlzFt95CbUwRAa95DSf25ZHmjs8fG6WWN8Be0DD6lIfrcVpT6e4tWdNWEdesARzhv44bEOyG.rb.iifec__PSDzF55Dr1qn54kbxW3ItvWUkAMXx5ODB1sPX6XRKa5BDMwIFBUZxQeI3MLtJqAetSCg5O9.BNDyXvk.AN6onKWrUsjZK7IytFJSKgtngTbnfi.fRxeqYyFWLwJ.VU7_raXSUzrRfV4L.sWCQs71b5OJewz8VNfuh3BP.TYAF6pBL6I6LVzZpxzQmYGIdvjRzB40j7RgbciQB830gtZkGL.a8vrJt.dQB5VKI88vGYA1SqBvXDxo7MWThXUiFyQ6urVFVa_EiE9PP2_1tT0SPi7b1mwPOFgIH3NIw8osyAJ2m6L9j77STMzVK..VlVUX9g"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=90fe879ebcc2e82a';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\/300566799115?__cf_chl_rt_tk=ZLTnnbMB0u8kZHfhA4xornlXbMn2qPDzgH6KBQ7OecU-1739215994-1.0.1.1-pwP7ISF0R_w0XXkNjOXajBeCtsgoPEuqQGIcpU19CdU" + 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