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-7025638941-gov.caltech-edu.pp.ua/post/7025638941

  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-7025638941-gov.caltech-edu.pp.ua",cType: 'managed',cRay: '90fea815af97111f',cH: 'VKLoWUH4VeEh4hsiMW7zCH671j_HfvQaPE7KXvofuz4-1739217324-1.2.1.1-JbG_zItgVJJpB0OT4TJSBLNKwHp_gXKqrDn8lmYEuM8E1J8HvEJRU4OCZvi2uBBn',cUPMDTk: "\/post\/7025638941?__cf_chl_tk=l55PYGfh4wu7C1sT_mn4fnLQNgxWcIez2DKcmUg4Pj8-1739217324-1.0.1.1-xDVr5oLK4q.sPXJ_7D1zjfWG.48oks.AZPp1DbbvWk4",cFPWv: 'g',cITimeS: '1739217324',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/post\/7025638941?__cf_chl_f_tk=l55PYGfh4wu7C1sT_mn4fnLQNgxWcIez2DKcmUg4Pj8-1739217324-1.0.1.1-xDVr5oLK4q.sPXJ_7D1zjfWG.48oks.AZPp1DbbvWk4",md: "syjP300rRXDJdrxEoKgqGbzsZN6rHHxjeGeDyVlZjbY-1739217324-1.2.1.1-CgG1PTrPF7Y3X_lpfQAQTO2R1HX7AE3O1dFkYkvcIJCr_tdCMD6kJrFYwB.5Snk2.13gMse1j2dfC2LsDwvIDokYD8y9thS.WxTKOmHiI_HbUp3U1Mw9Ujl.ZS9bBbv59cJBwiE3Coj0Y0FQ04G8XcPTti9q5Vqjp0aWCM9FBYV3hpjFl_rLwGcoCxqAIgAuTlzigI6xqEr4ubTPBsGJvgkgNCycpSwFoYQqoNFeEjrL5xwpWqmIPzx1pi0B6acJotAXWy2179s6ApakVJxQsOOQvYd9NYo6aoTyV1fuo5155pH6ZGt13vhlLi4O.GId3G_2jashezIEYK7nXwBpLLWfW.zcNExGDrnBdqihA2_6ica3SUW8mmbIUfLufiN3qGx5WkR49otQWvLe85yc1MXiCvlff3OlWBP2Bog38N37p86QC3gDDHycxCae.hXpswDY2WVon7b1dgYBeIe3tJXWu.j6mJvfLG1Z6T640.IoXLmyu_Jt36kjWAsS65JajSSHTBsB1mSZz79rWAAk58n1PCLiXwPLxbWrAjGCWxUjxunI4Da_LHUpeV3K3M7TFfeM.witpRDhqd.f5W3qH.2g8DGH4f5asGkxOnvcnbYCUaFTfCD.Y1wO2IISMOdxtroTL5umsuKVEa5gNOiNsK1vEAS9asRfAVH9yeRkGrtYCaXaLaFFSCrX3BcAK60zMUDvX_9POnuHTC_BF3bADUv8CpK.FZKmBlWtiB0HysRLPw9PCr_lsUJw6jmRCksoxkvWMfVrY2yPlDf7__v9bI440XX3Xs9iya.FCer20AQE8_2EaU1vnQtyWdUeljugbWnfCs5U902ut0wlHaLAW.Ii50p3rx8KgdzYNP70JsY1LKvXVBayOoGca2Gggh25az2Cglto.usl_qfjAzINP8F8_Ewknr_7k1LbE_aK7HGPwf4yOIVjkb_xwRSc9pP_b1QGAex_oo57rokH4VxqmP_m0E.cXtvDDk9mP7G.wiBzEJXZEa1LrtucMXDAJ2t.dx_1hMMPWecl1MtBLq.W6W878X7Zqaraq2bJ_boJWol4Uml1Vf2fEH0PZKbWBcOmjjNrruaHNJG7IEY4afwL2OqUvbWmyGSwnq.JjI477A3KXbkf10fTlFzmcyl0JvIiPJv0VEvt0Ed5u7m8aN_i9Z150TzCkNYwUUpI6qfWUlBx.PYxO7PdyXqjvakV2F7QbVojmUl1qyjUyOr8GLSWRrYPh26GZxJePvO304Lj.7YPiwWv2myvcqX1IFkEvHujRs1yHbLw74P4P7N6FjvNg4duviltFh4563wmymcxEWy1CZ1My4KiLPmJ5lIBq__5qEfM0vFMTaAy4cb0W8FVguw9bRN.sliazhs.8xYJiMO9D.oo9Hgd3KGHpQdgPxTgmGD5vqvXQXgm3W3PBldzW4ufwGQkA_is8zNZybRBGl.SObl5X2Cfx1yVnaYjmclGFm.OzBca7hMM_E31I1xd3elKezJXRRPx7SVp7fvlEsOnR4fplnX3ZM3LoEW0bZsAf.25nqXbIlg1ZYbdZnN0LY78xp0ONWv5l.rz2NpyGQyZJOmbXJMm8iUkRePcvgmv6ByiJ93GQ1YI2pzF014PHdY.TnN7LQZSkOCXHXsBJk5f5xtznDvUPVmUiymmAEay19KZFRXcsyGwJaMtJDAFyDwQEpKJkVfL60u9pvraQaeek1hTRqAx5aRbuePcEHu6iihAgmAIdIVc4FqbS5DA95uFhzubvczjSw_uVDvSBW_NwhhhVzWyBr2uo_h8oYWKaNLTJtlH9ue2cCSIAUvda8_aQS.GwILkebhWFi6DQLgUpML0x.Y60hh7Eqz2SjeJMs4c5yX3pz2APoSwqef5SjpotX1xzbZgIDI0oJFHgDDrZOvOgphPn6PvF0zLgO5QvZe3R8qc.QuNUtNGjxkh.VXzbUsdIGJBQ4UTeWWTCYLZ.8_XpZckPtHWu77gaGP8gzltt1j5lt14jbIIxvVP.6E9Md2ldFiOmt9vbEtXCXutVb0Zy02SehWGMPkO1Tt_LJs9HcIfQn_Y6.sKyKLfMcV7lHDotBLz99tvjJud9TADhsz8puKUiJmsI1zmzP7WEOoYTnne9rSh0t0YyD11i7oc7DrjK5yvETOEf9CVM8nWaWKvdqilYKryeZRUVroXaBD0uy6_LKQK95bJ0DYe1EKCdp3a2Yosytn22VTztSiEPOb6N1uLzk4.JLf.xIlnQpoSchs7rR2htGXEm4MzHg",mdrd: "dD6kyK634kOAceceo.MKpl5uF44P5vfI2os0FEfR54U-1739217324-1.2.1.1-5I2.Sb3rQKdfrX0jCFlbzxZnaiayhKRTp3HjNddwHLS_py0wQKr0vitbHwPPlItllIhUUQQfpRfoXAsJbge4hAd6W8.6Akf5EKDQ5JC34zFND3OOcWH7iYtmiKVU07yUVfEotYhNqUwxKveBIXHZqjwHdJTNWnkPfYnNLsadLv1mHErDES20qaHYorFjIkps2yJw7O.Bu2aUedB4uufGQbZGJ...wXT43wLAVs5rc.RrjaM6T89zRqZcJ0PuHA.jXl2lPYfsZTBFMJPXUC7CiOPFEXG7Dhdhts.At2U_QUOZXyFukp6U3iaqAHdgen2ER3ne.uZ.yg7.BQ8A3wRtnVQhZkGB5ecerLYK7EHJd4NgUceMICpiACcP4j48nYHPGawJDfoGsRBS69VoSVi.rjqWGDRQXanAS97LyYpuxbU1bDZYrLC4k5O8Uh1iwd0X_qXHvI8WXDGxktqaV2XdOvioczXkVr9tQUvneNL1QMR1b7bmNvWxYM28XaWiDNOjUhKVsujNEdBJhHl3F3G1ESdPsdnnFkdO1YDqtPrw9tSSv6vZwNDHWMxcs6lBR7HcH2QDn9fPhL6Xd98yw8FIn8Tix42Bclr5NQ_abnslbBWExkHa2XGYUmNeYyKwZ6y2hNQ8kaY4CmQceYXWqy28fMM7v6KJ7_3VjmaNokj6rQtjqQfJ5FM9Ss4ME2gozfakOS03k.hE2Jn44U4JUKC_w03hMOunvAN47yZ6eAuNDaLUxD6ZpEwaAgaF0o95Z06GkCvKKy_sSEEW2yyYD6arJ7NQnCml2XPtCzUYholB11ZdNIindAy0fXvLGnvTI1aOJ5Sg7SQpMps6rXJP0lnApM0yu4hAC5OwS6QCB1X4TGY17q9Wf7eeai2aLSR29.xe.wZDh_SbSt5wB5s4hRxN0xxMw6USJo_bnOMY.ceT285kDdjv3cSxiNtlvvC3ccKt8MhOyri8aU_uHIdpKnKw1eCPqQBdvq1bFtH_RzbKqncQgHyu7iMZDfSYWEcB12Jd2fBkrXrqS3QauKc_cnGkyHrYNZ0s_ORhCRJEwg8UyhcovS0NGPVJYlmmjuH3Vo2dN9mu.DZKeQ02J6BTo2y4277QF1kELEyizc1Wpk06EO8cnldmSliGMEdxXYZF.4xkrrVvnM6_UZlONwk4I6ayFTObo1xyQVYghsPxjLozY8zmZzbJfxJCf4f8XaDPkCcDhGi4k6YVBn5jcEcuRd0sYLOYvzypL7cK.UzDb9BJDz0RRhjrOi.v3e.S7BxPYMnc9uBJv_Tegw5nlJsFSd.PlsGG9rGfpbpNgW_2Kza3o8To4O9go_d2ZOeffSNPsuSVU6i6jyjkBVDZUHPrKGGIt9LvATO3SXuTPS453joZoJ0cKHmI.ihZ.5gKciJnebetNucl1pYkPxXidderZ8xIcR.tZ8E44SRZOnNPbGLfrVFUFVPMsiOML7Uu.XxIK.lt_jpS6THKnsgLffT3n3uhapsTIRBJJs1uU3Sp2BI5c5H0S2_vk_uMH5Vwxwjw.zbONeKs8gZ.N2aFJF0zTj9ANqUfsWt5sAAUcE2_8UqILyqoitWqAGGDi9CruJJGWJn8769zVqFnoOSnFmcNX_xpP8S0C04.pcEw93Wffvd2Xsdi90y2G5EvgSm0QZF5zKvi_0EO6FNxnj.FI_EeHVFmco3DTVVD3kmn7eE95y4LW7nVLS1H3qsZZseGJcWp0c49BQzhtsbYOtenWjangO24knDgnnMqO29OqzlwsuWNUb.THkgvaTvcNqtM.47sCA4M0LHTkpas_xxFA6hcTvC7mDecariTTkH._fMhbAvZ.AJ3COnq681DuJJU2a6XbJGOa2F5PBrEQzdxVDXn8fbVZg"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=90fea815af97111f';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\/7025638941?__cf_chl_rt_tk=l55PYGfh4wu7C1sT_mn4fnLQNgxWcIez2DKcmUg4Pj8-1739217324-1.0.1.1-xDVr5oLK4q.sPXJ_7D1zjfWG.48oks.AZPp1DbbvWk4" + 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