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-1346259780-gov.caltech-edu.pp.ua/post/1346259780

  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-1346259780-gov.caltech-edu.pp.ua",cType: 'managed',cRay: '9100e28e5a600616',cH: 'IAveMt7qjhgjxA17zoY50k7QYv2hhHHOyhQzbhFGtkE-1739240690-1.2.1.1-c22eUxJYkE0RJN6T2payIraxQ2UP31aFHVgASPD6pwQRyAZhLlebym1fBB5ph13m',cUPMDTk: "\/post\/1346259780?__cf_chl_tk=cUbsVy.onvaZYoPHceIIAP3vTkG7.JuUlTqVZm7norY-1739240690-1.0.1.1-jexgRTBOXQGg8a9g6F6ZZmkYzbT02OoqqggOYerjEBw",cFPWv: 'g',cITimeS: '1739240690',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/post\/1346259780?__cf_chl_f_tk=cUbsVy.onvaZYoPHceIIAP3vTkG7.JuUlTqVZm7norY-1739240690-1.0.1.1-jexgRTBOXQGg8a9g6F6ZZmkYzbT02OoqqggOYerjEBw",md: "weraComdNmZny9lv_BE7T0Xks28BM3KoQGHeGFLLY.w-1739240690-1.2.1.1-QcrrdnSi8JiwPzujy9_iFNDCuL_L_pYnk7yDqP2.LPKFAC7b8ea6E83te8G0BVtLM7TBlMKPbKlPL6Uzpd6EuNf4sWdX8VSMURzTBo4MQ6Juu80vHwgVPL2dGhh6VpKwuOdtfkFdJBTp1LOUDibxgurep5QAlB88yT1iGeWTk7z6YQfqiNF5BHUkmt5RwnlGMhwnNciPMaGgdRSWOWIw2HtUoq5BHJ9NsXHkcqn0iyT1lM6c9_tu5Z3FWJvAhHmg3adwCSJOyqKqoK7754ulcU.hJL4mPlb28QB1sqsM_DE7D2OqjGksC4mbEerQij7YkUzp6ZiQJtU18WjhCUfHLcGfWY50RlOJKJkfCOIJilAp77c2i.27w3UET8fAuCvRB7LDsSmf8URD5WokoqlH0i3PPbTF73_J42DZjd_USwy9OKJU1kuwGLcat9hr51aoOdsTv67oWSVhGmkvEdUKa72w8qcPI5ZNJ_vQOoKbL1z2jK1yreFyTBICEZVCXs6NNntpo39zRZ3GOujvqwlu4KnJmw4Rddzybc.TwkLRFPBOklb9CAemfftm1VaUMzeYB63ql7ecF2G.swo1E.YXqI9R3K0yR3nvLqi5GksC0wJcbpwSLZTVAWekliZiwiinPwTAjBoTZ4MIUt4jsVSzezmD06Szz2gWYlf1GSx2Ei43CsJdPq.leMgnnq.9bj4WVpEd8F2W.AyKUGBQHwkD0iSQFPiOiHA8Qv4PB8inU5cK69v1zDe9bzCYWZszxy8EilUauSSsI3f3UiSLxlmE.4nhQnzJX4A7g4VeB8L_17UKwPYvgm2v4pfjGu3UW.T46OSqGjD374sTITunlIb7hL_bcU0piK3T.HbXHzsudkFgXR_H2FoWgMBqoKiTfRGCuWOTx2I5vTbOnYhhinP5vfGEj4ol1ATcHRTOT9q.gPsuDS1b91Pt1G4ANPoSM.FaPlaS5X9u7SMQwjkms6Ta8zPh.fKF9H5wSyBEW4Yg1tWPjTn00CO37ZtZXeatpzQFw_I8rkAyEJ.2ibLT4L_c2AlU0MFC99B1fzpQ.XYAxeErBjhF15kHtlA5ENt7aEOwnD4A7Eu7Me.eqo21ILXxW9BDUajt2Cg8o9DRa5SJvE8xt279fsUklMF.GDAhvkSa6XwyM0_og2lAT1FzbjwdovXs178R38DmqhlfdjqsAFsQD5A8.lv7kIjgJPY98txOOyjQSkleUh4LuT8aZsNxUobhUqkfycU4y1L47pyccW481fXd7xXSwX52ZlBELR06.D7YlZizhHR9zNHCgrNjnaVgiRurxWl2Uq7Hlo6berDaBsm_bXcMPfHGgSn3R7YjDwXyCFXwjcbnO_fIaJliXbM9tgGYah2x5w7wma_x.fWWj1VhI4SMSk1Qb7z73lDqFSq.bbdSOLGVALl3G6o1iV_UJgUhyPrKfdrgmNWvnmnPk3bdF_D.colKsSY3OR5DtPB5dI9p114pDm1pB4I.YTs7LVLZwSfYx_lMjVKJxz2Ih_wfmg1bJ2bYjPAjvi66bt3gRZ6GLKYcEmLpG.9rFm6.9sGIuQ4EcVBkuExQTrUJTPQhIwVymhLfJKfBKDv7y1UQooMlv.AYzQBMzrp.wOlSDJPz0MosG2_zvCeEOEqqL7G4GqxiXX9q0.sy.09yyi6YCqbc3pZgsbIEtsoiD4wHkvL2L85mdY8_fD7R2Cn_zamE9h1cNL7DtfoOxGAXzGun8CXffISJqulRvMZ5iqkmMjsctn33RL92Gt_ZZ89tz2meIckP6NigNRzO2LzY3WA_6z9eFEw45Ad7FGPhEVatWdjKbGrnjkdw0txhtsXUhPRu28KUe6klc99U9.tvZy3iWsCs..cfMW1hNG9lfWScvqaOBUkGhkUaQX3azVai15X5SNMVPcD2emPMT5DAUMuwFNfmEgYXFzlYv2hDJvB7SNmcPGBW_.VqXd6VkxS.DU4rrkHfb4HrMe1renIN8wJC.480qH7YUFm2l7qitPrCYvmTDNVrkOHq74.mwEwV5O4UpWednb59iFPkZCTnnjzvlfI_ej.3YY9Fm0mKC1mbywo1GKQO8r7BMHAWx5Af3O1gYjp5LGjg5YvZ_EL8suB.fcC0QfLpyFmgg_xBpYJuGgoIy0HHMLievnFSyVnBj0De3mDjIIcSAym62TkENMUO84QRynMLUbERONcxuZtXmHYh22tvH9MhqNlUFvAZ.dH979izXMJV8s0liJ04OU10Egrc756A0Ow9LdDyTA",mdrd: "3Lr4UCeEy7sQHpy6WZm74g6ewXECLFJ6F8_jTptnTpk-1739240690-1.2.1.1-CNHROnEEtrRWDwHv.TnQ9uAG2.XHVZuWkjqy2Lig97DzAoHx5gR_7HWuiU4pVlxNaec6oMQuMfWXhbBMXpQ8uYKW_smdi1Jq1h0OJe_O9cx9IUdqenW1dVywN23s8lLJOUiW9MV6BMt0O9_nAsvAFYovhf_wRACoFrPsF7H7w_fVr33FtlRJ4lywfLxaYdkRJnOcQMo9eu6lYQwcOAxk.vYgS_zsD83NXhKnHZszTUXqltlhd0tW3psHERuwfCkqqiui9EdlIh750qhauUsKqK2NzMzBkbbcwfhOIZIEmEypm7frVSEWwF2sYfuMvte9FSMJe0kDznlj6mDmx1mi7dGi32EYnbBkkYFpbnCvjltAPHY4CDxu6mx3aeLsZ7L6rdkDY0uzcOBWO1PmpmrC6zL0A_I.QVncN3CbLBeQP8zDReVBlpeiCFIy3uC9UalTWP9anfjYpd4mzJg1MzaPDJXJRQr.hu5fwrLKEEqkk9w.OdsHe1HC6iIrn19sg_5mEPyIPfvB_HkgI8_vzbVIuCgDZ_UTP8u_7C1687gneeZCchEUnx0BPtFqQ08I.G2Sa65GlPcv582S52JQaDABZSBZm26XJ4cDw8waWfk5911CJyQWiAQVcGKNFAiHl6RxBrclMR4jSuqI3MaiktdW9Wudby_5x9x0FDFoaU6Fij29D.OnuhyAhvf9Nl7cD6vgI_V0S4EQ_tA7WpENTDO.gRG_7MdV_flHtdNN0sOMVZoQMxY9mpIh1l0PW3l5EftjNhrg8JNncpiLi9k4E_nUE8cWaTQqDxNYns0YEK7tk0n9DQy.nYFcQlVRIkKmN86usPiBgkjo7Uq2VFktd8ZVTSYJsUn4gRI9IAYGPd19fCD44nzbryYPMAinKqljPJC4uC4K1_YyVT.Ehtyv3T9ud.BTJqD2v33dyBANOjDWF44QdLM6H_hHQA8lNlieqsxR1w1ta9PXBcvjxFQfuSTNd4xVhh6JPBqPzoyZY3nDCvYLC.yQ2hMxxHIBZiSvfvigPGcQF8hh2sN2cZEQLpezTsrI0LqYD0_plLvAMBaetMdiLXsf7rDCxVFWeiD2IYjWd6cmmSWNRe01fENAPIJRztJL1xMy8o24g4mqMMTwaWkR2g1Na2oCeE7PX8F3FPvh5Nov.tm8moTDr1c1lrIHvbLO4az0G4KAW_nUh9QQmDafXApgWRfJLv5RTqH8CrWq_54gM.79CUcntJOM4NVgyOTkxtlISGcx6CxEvGT.YDf0b_t2_n0xL.VHCDdNsUqD2cLoq68vy2IcDyqVCoKjPTo7BeHjCjaF8hhAunGxNGBaiXhQlbFRRaMzaJPXpSEBxwc7GOUzHbVWAUDbW0n1l2GyAyInqrYHNUP6Ryq.MRU_1BI1Mx2CRqq5WPxKKwhRMAXrZdHIoXbHkV2eZJPhww_Iy9hR_b70pabRghkQB6Uvkir31GoExA2egbpxRdb6OtnnNh_vsLDlkNsYy4DFFmxhEKg9WIwjqaZHm4Sf6MX8ZWxtGfJSidE4s_vNzLF_gcv.ssHAMzjEy9uYxLL91LaK1xeSzqIYRE7r4EgYDgtHEygZ7uIIUdb0PvvlZXY3cf24w7pZ3kZzPgzAfkSxdA_q2fuWuwe.J.bSDun3sL0HR6ccbW5wmychUZDVDfBEYuQ7RPSMuKI3hXVw7by4dSFeABJYr83dFgWGYocdzviA26phI18T_jQ86t03JUWOx9PRYtQfVijE4zmAWBAy6ysozgu9DWTl4W7cFezB.DC6XAiko_yY8X_i.O4UVjjSB8CHRwq5o0FOFWKtVszKQDvEZNWXI7beMoS0.TQccmL7mlx3acIybj7sNYtpBBsPKAkFooRQkmY1zitKIJo6gA"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=9100e28e5a600616';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\/1346259780?__cf_chl_rt_tk=cUbsVy.onvaZYoPHceIIAP3vTkG7.JuUlTqVZm7norY-1739240690-1.0.1.1-jexgRTBOXQGg8a9g6F6ZZmkYzbT02OoqqggOYerjEBw" + 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