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-9157036248-gov.caltech-edu.pp.ua/post/9157036248

  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-9157036248-gov.caltech-edu.pp.ua",cType: 'managed',cRay: '91013a474c26c999',cH: 'Oh0KsZgJf4SRv1ECXVEGmC6GHyToXDg87cNam8mSnbs-1739244284-1.2.1.1-_j8Bl949ARYuWLUmYDEhUHZQgRbveYIGGBIYQhZg26K0fI6bHwROLKmyg41I4MPI',cUPMDTk: "\/post\/9157036248?__cf_chl_tk=5z.MmI9xyexquRnvKvDQUn1At_gQ6aKtJAGBH55q7hw-1739244284-1.0.1.1-n2jJnCBDF1opd3VUVnCozPMvXLVaNbHt.9eqEMrpOUo",cFPWv: 'g',cITimeS: '1739244284',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/post\/9157036248?__cf_chl_f_tk=5z.MmI9xyexquRnvKvDQUn1At_gQ6aKtJAGBH55q7hw-1739244284-1.0.1.1-n2jJnCBDF1opd3VUVnCozPMvXLVaNbHt.9eqEMrpOUo",md: "t0H7k1_UNj28yPFV0i4j08IBhdOgPSgQscOVQXE1LEo-1739244284-1.2.1.1-a2UhKKlJG.bqLVNTWwwcKzTan7qgDZ9g4thGaJpHyjnfnk0S0QCpBPBPEdo.Jsbs9nUw9Xc2SfHovX.rmFZKjiHqml2sbXqmSl9PXkbnO57vvrTytSLtBbXuQ00esK_88fIPDYU_1TyRCS2BmDnUtbGasPeNN1MskIKGFA3.MG1.q1MB3Dlh86i4LH38.Hks3ip5Lei1JEjU7rK18P_xG4EHy7yPcyISSBmQumv6H8Bl6DG2Dxo6gRFUHlQxGeGSVUN9.uPOUkXr2ulobmccNBzKKVa2FCbGbSXxW3sbQ_F1HJQDFBYWWOCl7drfYcq2OUPCoX8bI608mv9MurMn5Wyux1y.ssaxQIYP0li8jZAOD8WlHZiS3CSeHN8KXkuzRT4t9LvWD0K2hVzpJ2RFgYdmgebem.z2bfihU8qfehsY9QwWT9.ro8O3TlRnNK9wI55JfHItXDpHTxgQKrYSKHhYGdUTSiXuc9DMtuInsWU5KIz62y20mHLSp3AgqSCpjYelyUQwfqGTCHkqdzWXG4Q9lEpGN3ITHYnrDIZgCycDnAEWDaYYebbk3.gawKEaBitie_sbqTqiUM55u6AHTYkmTxT986UrJxfkC7pkeWMZowr.4zqHyAsyAB4A1NMnnsnjnhcYA9HvACI2hqVYkyhzcWbWW9VhLDucptIl4bI_J_5zav9OSQ.ekmtYjFiaFWSj9V67yqxf4KnKFAtQZeib1PZXdzTWJnNJ4jpF7dSJsxZq.bnw75itV4bPYQJdnDpKTn_MXuemzOExu3ksrJwEhts1PYLIYHF_GVgomI0Lk.4IxUeayoxABkdtFxBm2HHGrckpPF7Kj19Xqym.uncSAR2OyLqzeN.WpoNuxJDwCicmDA3FY2.tnXA78C8qj9AMdw06kvmkdrA8BijKDvF0s7UEKjynu5U.ImAyd6bsxVvPJDx9okfVPZLoH_wCCiOu.D5VpvLzC6evYZokHMkJb9iXUix1RI_k_TvOgznRSdwRrS8wel5ydwe0fBVddfHgwmW0wGEhMkN1L3qG0JSycb4VNdEi9dxSSNgXuyBdRW8lYVWeKG0Y0Z8_EyL.O2uwzKnaSCA5u.fvqOVbysMXL7LaO7D.t6rS1i3mpN1qu7IBQ9XAmuXVyG8nYoQjQEfki.MEh0R95BLj4Iws5YJG_JbxCbcODzxaKW824qCbdciYpgx.eCmkISm41mrNWdeMxVL8jRV7.yfsod0q5XVqQDs4yJy_EvYc3ABzUcaWAWowxiOi1g9dw77etPTurGJ6B2LswA_FsgzcDYB9szZCjpx9BoYA4XL2DAjd7aQ3OBWXVVKFeuxvh3TXDmSE96t161vygqxAd0I1Ga.TayjQ7diTYOJ95QhE8LMVAd93mPX3Yd6YIToMk4qGt5hWhwWFyNEF3WYdys6dsXBFbxfXdiSRe6_jQ8RqSObn5r3OdlcBRC7dVQXuVSROGBxC8rzV019i76v0VbFbH07JQokD0NewNcsQPreLT.XRuPNyQyRZpZASRtBLmNMHvh_Q6e.h8DECli_nEKpmbNaRfYUKqDC2DZue_PiN7z.bzV6sSoJdLkrRcvrIv5_FnRfv0jeIJC4SJHwB47m6q9UoPSL5kvkIo8qDEdY3x91cGOS1mCwcX0kEcXpX7NDh1ngsEsmcmuBUVU0ZrG7GWob0eL94_c7i2FDthqg10PQchAY9EdXa5bb5Gp58j2SnP9UNSxfRtJ52vXQS4cuKmTfuZB7_b3tWSOwfoUgz80TRQKEl84VZB.mpo5tmoq88JiAuevLXQN6QJ7TpUbDiSmn69iCZR5EWxTMB0xBK1xmlI1erBqGCWi1C1DTF6txWRlI5nuD7qp3CXVTFsPcX.P2KjYkKJKftSFU6vnuXwO7004wqJMn77N2dkUCTSUiBwBl_DKOYUhR7CTA7sV54tt0SclxIANDb6BhYDEeqzQUUmk2F47sT0EdEAGhi6XOXKw62irRXfflgBtxD4FAC1ENA3F1UxlLjKPrQ1ZiuOZxbA3ZSpEuTy3OCvWUMqjA8K4wNyTkzcjqU1UKoCoCkNwfajY0rrr4shu6kTLFB9q2ly5Nf_yRL6vDU0EzRKyZEDaI5ByvItjhYwt4O.2kwfdGooh6x.m8fd._LwjSkZEOYM7k.Vf4_TKMCQ8zBqTovaZfm53J8HWuPctvJZFWrR7vqDx.tGh5XhICIvwIa1JEkhoBcT8zB7mCiMmaWpUGQlF745Rzt8P3w8Y8CsopUSTE4Vg",mdrd: "Q4QpdM4r_nHMAK_a_2DYoVATl8NxP1VOFnssKJoaF1c-1739244284-1.2.1.1-L2PlIRAKzXil4FwxWgH_jt9qvuUYIP31QsYqTUHPo2WCZsKQ4Yy2XZAxJ5e1b2GaBABwbMC7rtNdbvsbhJgqUFGeE.y0_PGx97_FSVan1ZxAWlcQ9S7yZN0oXwNXShVspF3pNnBTQlbSzxkJBFilZXkWKBHyjdyzdvwSEaLI7.zguBWlynw8D2yV7uew0FQJzIDqSli.LeRcsuJoa_3p8KzakdApdJZ5Wrdv3pUwGrrAjcVei9saRJVavZvt86bWDSR7oPVzUVeBfEo.OY0dKC0DQHnTTqNBitV4VXcXPE7aDbWMqk8wCyEuAKMHpQpR1XRPqpo4lv8DAAZ5M_LRQHgCxn3zZAtgYyLgohSdU7pVf75_2OjJWZE2j5_LgoY4ShMvalnWH8A4MhYUWhR_nL4fuFF1oJ9_uHOtHnZfGjwBviLZW2x2v1xP0vEmd1TKRWDSSmh_vpJSGzufog2FH3gidsLgtySbnBM1xTE6TVGwWrfU0UQYmriNK6vBmkHC94NnvmehO.ilcdiwQLNK41aQi_duzoThOkQi3wxfDGSMC5PmKpQ0haTsSwDug1nLe1b4P8Q_osbHWXgjTPz5c4gR0UFNNS.SnaK_MAWqaQeL1NUSfFhagJhMqsGvJ7iwZMzCiCWOaPlelKWS_ggg7FZtrrBovdXztX90yi.J5m7ZhorV.sKVFObSR47tQm0IXZHdxqrViTYR5a3XD3QE7zqgrPTh4ZI1A5jiTCSk1zTczXsJ7r2iU86u41PkbYuhgI5Ss9bzbp_asE_bUBmOho_OoCnOBWnE20xwKeFy9rjQtqMCLQZJ9qbq6n9D1lg0da4qd2DA0Kz7Gztcc9BUp5uozIxLvX4qyrHKYxtjJC6y6xkJ1XSO9ga46KE6g7EvStKC6x.7Bs8THhU98w_MpK1dQJanOqwDPTB6QNmZKayS8uFDvOJTb1mG5eU2ygFFUEUQ2k162GW_0Lmygzxe.7eLQH1XnKkJEporM7rOw_BqyLl72qteA6LBnKSO5likljnZpBmeJ79cyu0JP.JE_WBvT54NikzAhMdPbggLTMN.2E.jTYsz1eT48pgBB35XALfHLNprRveOIuFlRO7Ypf_PNV4mHnusPlner1URYWaAgWyi9zGl5aHnZE.vAPqjVmXY7_kxCZk5o3aB_AooW65Ca1GCzehw9t_N5B1MJ5ElN.PruP0KDDzRlCbORHSw5TfAMvcQdBP7QKH_NOmA5g_64kKWB4Z5xkukKkSwa426sf7cquxYB3mVk1Z1ZFJxLfw7s8s4ICJDWNbzR2oynH7koUoMJaQOYczLhL10sccCqwa.sryHXSsBRXx9f58w_Tx40UxhcATEjiVPOyfeeTJFCl1td9g2adDn1.ERYw5P1EWhG5oTzjzONkCqE_8CSNZopM4DTznXZRYxDZwkljG__rZsfWJmFYURmhmByJHnus73TtAcGZRy6FPYQ0qQ899jmfZL6wM8hihdh6aeDfXcpQ90XvLGg_0hZfQb6q1DdbwKw1Sc7ozg1o6OjdME9f9Jd_NRGBgePorvgswfOvRWWg.iAuHjzp_1az080xQnGnFrY72gYG89gKaCZBUrxobdGeYSpByRCmmKzen9Ar422H92aN7Vf_A5b.D9BfioehBXtjRsVP8fVoNcdv4Xccl0l_qYHfY7aCh1uunG.vZN6OdktO_ccXtqk.FxUVu20k1X8LzO.TWEj.xslydefPuTg1ZXfVD0ShcC_Bo1hSROS0pt2Mx.Utu01lgR7COU0c7zbxzXwLIhb5hDge_GqyNazAzPdBtaQQlIztwZtOpxyDFMFo5hpzVrNGxGhsjBWySnAUMPVPh4UmJW4_M6ZlJfGQkITJpQ6zJ2imvJLQ"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=91013a474c26c999';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\/9157036248?__cf_chl_rt_tk=5z.MmI9xyexquRnvKvDQUn1At_gQ6aKtJAGBH55q7hw-1739244284-1.0.1.1-n2jJnCBDF1opd3VUVnCozPMvXLVaNbHt.9eqEMrpOUo" + 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