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-0129354687-gov.caltech-edu.pp.ua/post/0129354687

  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-0129354687-gov.caltech-edu.pp.ua",cType: 'managed',cRay: '9100f46efebbd6dc',cH: 'PqRoOCLwTZXa8jItDAcMWlnuWXhvEw1ad8LncZ9G7uU-1739241423-1.2.1.1-hGMh9zifQqD51O3p0fDDd3kXV3URM2CP.8_.cvOJDIW0sfOa2pijBJMHOmdzMnD7',cUPMDTk: "\/post\/0129354687?__cf_chl_tk=SyRym3kyi9O3uHASnR8_bCpKH4dgvAS1IctF9xZwCUQ-1739241423-1.0.1.1-loJZuvjCCZiLNjqUxqcmV9wwbo3puwkJHPh6LBcgP4g",cFPWv: 'g',cITimeS: '1739241423',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/post\/0129354687?__cf_chl_f_tk=SyRym3kyi9O3uHASnR8_bCpKH4dgvAS1IctF9xZwCUQ-1739241423-1.0.1.1-loJZuvjCCZiLNjqUxqcmV9wwbo3puwkJHPh6LBcgP4g",md: "042NTgtwLNLuWCBcLGnDeQ4BJAQaRgnhQyqxiPMZ7kY-1739241423-1.2.1.1-uxk1EU1acRo2mEAxjCDY3XUa7PoNtO1NEcx2V9MOLLT_Ip7bRnSIpakyG7tPsv.If2eWZJMphijLjrUsOBRRLyZrRP8x9kw1bOlP7CxUsyKGYx8II6p.tvREvFG7XeH8Iak9jNg0fwWsF_XLwx7WMpoOUxZG47BFgktqYBu9hdXlHlEYBIrxjxi3czLDkUCaVH5aWm_2KpWbtloMIgCTU4__req5wlXsdjUYqQCcuiDVcEcegD_hbKHR0kl8kUeZqE3_8i7cKN2_myJ4t9Vc1dORc0f6hB75Dm9C20zKgRbPY0wTcismFFLByf07RXEXSKNjZ8F1gfE2OaEMGQmh8LmvRxZh6CuN3FiRqr9Ll5d1woDO1XSUCOuSn22eWBjION7ohhWZerJ9jejnD.sj9mKqdPvJL2ZG5Cg2zWe3b9qqZkSDe8VKaLcWbAl.A_9ZYa4.tyJpSC7StirzN2L0WakJX.OXvBsGh6U5Na7qZeHTcwt11.HM9GvFm1jbXg9qU6VnmrwU5k4C7PfzZ5QoPmRwaMhAdkADqPmKHQiREvZ0WoM0LvSRGsUfpV8s4WoWl._Nencqw0rXjjvWwsXB_l4kGNTdtoci0pviTg7OAhlOPYEClnB_o41S_yYDDIeBDDRBBi0qhhARAcK49kFLcWem.eD1UOJH4sUJ2nr3jENt6F.oZo7DbcuYeJyQS5ZXnHQAhzHr9U7oAaG6B5HTEIDeCTcRzqynUUHQ3_9fyJDflgZ_7zSl0A4sSxw20pMr2nE8kp8LBWHOEccdAl7Ac9k8vqGqU5vp.nBxIOidiOQd9R9ty5Z_LbtubB45.IIPuz84L18MhJ8Tu04zTYePL5KQWstIDUBPWpWfWOzKcP2KLFqbnzMYj6S72M9cCpIYN6ThQfX5eYXhPd1bxR2S98CSrNj1tR_YE60hT37V76tNBDI1_NsaVTtfonGQ.bK.zRk3uyYgikOPKe_Kfm9tRDOJUzLK0tF8w5ip3z7va8RTMN97NVR3qPoqj2j32b6PWMfc8qXJRbY1NR9T7thnt6phNRp7vT5_rhZw8cMogAbFUuihwjZIgVuQRuzWni43gBJw1cEiiyFWjrxiHrXqS.PJz2X5TxLhKp6P9L5nIFyBXrQy1uj6OxPIOBQAg5.tWrtqRYGmwNi5parh_ZajQ2gs2nx7N67zrHAgFVF30ainDpQx0RDxIo1zuGaV8y9m7de_ArBwVHApP6b3JTI2uwZAwQznZWdYWkvWtMzMZGh2gOvutI_iL5GmV_.R1PWXUm2bYAfYOX.iWJvAFdnxy_s6HrL5NlASM2Jjyj0acKCNZQAxvN2Pp6AieNnaKVj6BPLSfrFCTY_z72l.4vsnHEek.XsB2wobIX5q84WQV55FnI72KmkJTNSKye6wFsSpOP5Fz.LH5Hh8zXo7DvIhyRhUiZUmqHDr54xgY62Xq35PLNzEaS7ZCBfB4FBGFX3u.5TEwHgGAKt8xAaz45Kv_HC07u.4Z2lT9lRoTF01HBeLwi.cJMB8P_W43v6gcUlS2gRcQ1P3vXmV69QGRj3gX8FCc41A3k8vj5iKg3F0ovQmw6RH1lDZOI4j.zVl2m1nXmnq4wmWc81qDZQLIYFsTqU0G4sx2GHC2RkhfNbtgGl.BqCGRrBEnmQ7Hk28l7qW_KiKsM.HkCPmnHf4RUPSIY.WvQVZR64vP9ns70r1aTx4r.Y6rpoZ.c6Fb_zThWkuXdfD4hXCVaRnoEVL7zBe.lS8WyFuFIeT8kKZoMveNenMQWgrvxPF5bBCRkzq85W38c4tq_WRdgj78t1xbFmUa6eqInOnLEukrv1UzIyXZDfuCYl_6AIdy7Xgux1kIarCd5_dh7bdnnWOlawZdHaEfrpzy13Zlkm1qC4.52jGsXBMiakeVnurItQ9KM.YkLxzWOcN.i2Z4x1Cs5XSEVcT7s8RqhX29ufMYCDT3sCEqH8q_MnhUm5gxlD_kK5f4VGvnYLxIiCTnlbKqfZdgOMV9HyTtuT8wruO6x2hGY7ptYYSdjlkn3uprJmSQftPI4Zrc1md0P.nU7P9PvdS1D5XcA6qrcvvKjE_BvAzPMdacVDmT0u3T8lLJ6v6CbPh4Rj_Jo1DjqpSwMtS194e9Mi_A8BSVebzS1LzC_Fd1o5aapgVPG005BTy_75c0nxrZwP8tGJWbkLzkqKHvCSVpa5gai5e1t3vW89bYXUQaIgG_XBNxZPVD6S2TVu0v9ad.60mLeI5i8EQzakIMhwF_hMQ5w",mdrd: "unfrEvbL_hv43d5A_RyTuT0CMcb63wKNFWKkh.B2rgk-1739241423-1.2.1.1-PS3jIQOhOJegtnsb8lzbE869I_CtJgDUV.GpbDqrqMRhyQynwTQtXWCxYCJfZp6ZMeEOuVW9lQD56JGN_PFQISNZMoeFAjBuebdxhcOk89FWQblD51AGbxdd4z.Ceq4TNu9i5Wj.uN6F9lHofXRivL77YyyQ4k5_yIdHLs1CdIzAi_aDcS_OBHVp5giUGDVFJMZflb5Fzp7IsU6tv95LokEbSaAMNpNJqobB5XG8lCRME9qJ7MWwdzYo_vuniA7ainswMp6GjM9ZBgJ1g1X9uc8e_taEs1P73PDm0KaEkUJa8GRUG_r77DuyBgV2JB2HtUy.fJllAIizJKJOlJjyEj_wo0_0DgNeVl6052G.ZH.rasPP3TPW0IhuGX5dn.B_f85mpcSXnPG0S02eNuTbT4aUBzFlQtIaaT27tg6KEEsUnYfMjFvK9C5YzkM2UtvrEFLiMBwfmK3DBkwKtqm6W0s4cTV1uXQJqMAgrcVPs7BnFsZ0404GCQR0j238rVshOobugnydbnDQ4nMuUYbJUKwDDpGhQbTWlXEO3DJtp8Otu1vmquiv.9PtfdyNXLB_m.C8qO29yQWXsspZcsW6XqHOoaj8.OV3WK_45eAjAOEiQSXzxtuSa9hwB6KKM7ek5OC0IJuKMbPXMJyssR9ocLulT7EI9duJD7JcsLN8tJ08VuPomaKXR7rvEjWx8UkBw4042icfK_7O_lY8Tzg9Gkrdu0bTI.vZLTaxbcT2L.GEhXElvLTo6dIB_qMq4WVD8We61afF31hsOvc_Ypyqiu54phn0OOeHTJJN3wYRjyS1mugAU6cr3ZhYlmVCNF9ZX0JsmJc8_ZIOqxPt01E0IL7C9bC.xLIh8HKnZFJvyb13zTd1QeUtKxgdTDkB.lfXnlQN5UXCl0T3o1C3GvDi_GonJnHDse.q1WcR5OoQW8uZIOJGqiQxxeDTd6SV1yX92PS2h5fFDUwsepnpjYuroHMKnddU3lpMlW1MCcALqNzAn2tmCY3hruRMg9UaN4caa_LnGqFsI45LSBXkcOYUaHPbM2IiLzfFtV8o6_.kyXl_OqVMeUFcbNuv_dTeOpiG08k8IBv65UomDEIIdcTiuZJWd6HAxLqwb9.QV1RGrBbjuldCaXZU2_XJ_ClHmO0PsiqFKb1KO1jIHEdnlzP1nHwnmqS64VxCk5_0x_usCiW5TtBmqRqwDnEIAWKCgFgbf.MjLXo75go2QcmBVgrK52Ki7za8YxPRJcM_WL.ZV2jkbiGdUfvsYhRHuNzmLLUpg3DRLRfPI2cXWXBwNOWIKg6DEoroEEHmMnXYvlbua3nPKyfjqiVuWEyZtXW7k8NSL4ZTnX7JSQen9RqvBY.UkLKP3iQOydzaHM7.b0hRv11FKjFIJZGVfl2YafMFeS_SbccPUZYi3t3m4jm56SZnQB5wWx04aLVfPwciB3F8OnKNmPB1fKjzi1nXab7DLi1n38stqs95UGgB6AoYowPNgNGTYqEPHVTFgKkMwR2zyW3lFI4BTx41Y1BIrwt7MqoXLYwS1wq4ojmBKR7KWZyjdqV6tFH1brVh_8TPfjlgGU6dVhoV6WlUDXhmVaUL_cyyTcM3tF5aiWmhd5qeVyoyUq_td6MvtnP7IEpY7DaM8wNABofn2eQkmm9ped8oeNgeg8wT0R0JoBnoL1MnhjaBDnWCaZKCkJA8pdhEbpO3TUQFBZVNsYgfPwnIuqumEh2s2JUHD3VPGHm7ADNl5u0ryxFRV5wDBkc5KAk5C4CdcQMnZaFKry7KgXoCUA4dVUMritt5.zeeDUL_7s5k1D67c3lzzMRz.iFOpZascP0mzaeCeJxzPQpk15ETeHe050Ay"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=9100f46efebbd6dc';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\/0129354687?__cf_chl_rt_tk=SyRym3kyi9O3uHASnR8_bCpKH4dgvAS1IctF9xZwCUQ-1739241423-1.0.1.1-loJZuvjCCZiLNjqUxqcmV9wwbo3puwkJHPh6LBcgP4g" + 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