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-3129607458-gov.caltech-edu.pp.ua/post/885778236665

  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-3129607458-gov.caltech-edu.pp.ua",cType: 'managed',cRay: '90fdc2472c89c974',cH: 'UiIj_fIGT9Ys_JWv1yLzYGqXfmbX5ErgpBt9zuUp4Aw-1739207911-1.2.1.1-tGGVwSzaZFEezLgUMQHB.VMyL88G.doEzeVEjRi1cLG9KDeExWHbR1UBBxsZ7UMl',cUPMDTk: "\/post\/885778236665?__cf_chl_tk=dQ_WZLr387xaDdszQxarEOka7e7GFy5I970Eh8mKswU-1739207911-1.0.1.1-DqgBZF7hjX4tQH_uK8gBGOz6p785dNV0uNxtJtKr3Cc",cFPWv: 'g',cITimeS: '1739207911',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/post\/885778236665?__cf_chl_f_tk=dQ_WZLr387xaDdszQxarEOka7e7GFy5I970Eh8mKswU-1739207911-1.0.1.1-DqgBZF7hjX4tQH_uK8gBGOz6p785dNV0uNxtJtKr3Cc",md: "0P6VcBcut2VsUzEA1TPaUa4ZwKQ.1_iQpedaf7O9gtw-1739207911-1.2.1.1-uSriUXW1MUXIZGKkZ1.izf_lMnJRB3IPU_toq0oMTicSrlOotimEf8zytvTsRNNSolFJk1yfbr4K1CfM6tI9AmPeWq6y7h_PAdaWlAg1U4PdJdlXxiixUeDELUeWr_2omwWNv_pXK4eQgeXAY.V9kJiRCUkiErSylnFOEGqQfwgAOS5uY332c3.KvNUgpH0ETk.78yQUmqpHBfSeCmdSGSzoULzPKHB44Tvd1sZwxv_qrWkzmRrArhjAQ.eBWQl7KXBKuMl0O6kgz4Pb8H.G.t_U66NFyxfc.DnfFGt7WVgXLgWwdCtdeV_VbFZjaLRB6i_ZBGRwcTm8a17HVU6CiI1_6ZMJ8lxYMAhiqhBFE7vT7LnP6DHhHqOZTYRAJOlPiwMig3HEbbKzKqYOf1Q7Hxb7FXsI9o2Ppg0BW8KVIinlwbtoFmjgLc7cvxxsN7DWttulG8bjx8RVe5GbCQhUAKD0WHLSR.qD2qUkffUUuLMCB6IcVL7sk3uNmflPv1ZUI0MfuNYzTtpZycPQy_EDZvpYWsF685Wxj2OYifLyuSB0U96AGOCLjPSWaqRQKcifahxlCN0zyijBXvbsmVXgUO.TNsHWO3N3xqzt4sAoEfgueUeG.VIKsjBaBiL2n4XtLvn3iZdfScym3qB4ec7a4XohhC30kfDEk8OlNcQsJIAfV1SdpUdsJczH_ektchLSCJuFIcRxo2dAF1e5aV70SoYQRR.dMbZQ41uxNcDn3FIaZkKQ.NsrXHk7Vslqnhjy4QRMda8NOnsmyBOv0AZujqOp58gDa21OOupY5wZSTpTN_h3pFYLsYRKDv1lj9Y_OtHygohbWfqQRlh_ht68L8IuVpdEuHdcM.wVgvBui.95sA_364q0utT3pDzINdivmarTm2TQ6gnF91HQalWJL5gBh8wzGXPh4.D__Voz1lk2uq7sFO9tiPB1Vsni8qKYji5g4XtSQYFCMC3Jp4XvyRc2BaqF4QDpnBXhxm6tuhgJY0_T7hDZo5_mUy95dHUTeP5IJ_plBwfy.MVMXdW.c.NIVWYT5eKjvUTxKrjwk2jEx3p476BxkJaL_kgW_GwQ8Tv6ruSixo3cvN6p8SZLV1vRK98ecQUdtdTDmmVkBiL7Hh1PKeTfN1T6er39hkbFhLfwe32jyUdObzuDv5bmMZZzA2PFzPGBMCWQRL0eS2SK90Fn3AYcYGVA.tNEVEY4MtfvlZptTHUE1TtWVbvJ4IMoQOQ5vFAXairlyT2RjtUsBoor5asyVY0NueZuRCjGf5J9.JbvKANcnv407__hC1w0R5Do4noW26Ec_rCCQdbpOKQyWSAWGEurHJF7gP54qmixqRTS3AhQ9Ec_Sg5SAt0vQnizzVHx2SJLi9jzcWod7TufmPZgzkncniXyInPJXENtcG6_TcmtJz4rqKk_BxfFqtsGjBnkVCgXNYkJPRex0Pl3ld7fgf0eptDgsno2uteexHprFnDpnvre3ZW7X.FdftLd2gjBf9qJpogcEoRTENv4zLdasOt0_m6dQ8L658zAj6.n7TvtktIRYvC6q6W.BhxjiVOg8BvWQqzmPFYIzvba0prevyE3RZH1_co.bYaxzMsaAGRR.EXHapIF5tvKCKD0OYqMOLOAdJmAGXVLDpLiyenMysAD5PYsq.HAdvIE7hhq3pampGI1CE55SgTqtOm6ruVxPKYd47lhVxNQmGriNwR1IMu6318lPb_Z4JdFLA.k3zUKCxCHArcLPGGRRqsVzh.JG4LUWPR2VcskLG_vgMLTbgE0dRRaFfeuRF7j7WaD69Mow5.5P5QSxex_LvV8a7TLeWx.eABub4AVWkcIcVyh_qWsN.0R29HBJXqBnCWS_7aU4eTnW2f7FlEv68bQ2NePIwCEP_0_mHr.whF64lHxuA1EtYdJ.iQZz_7kirHKE9yDxpZQPn1AE3VajZbXI17FdEyOLZd8lORGoLaGSDz7HqmbwivunmIdLplSGSyiA_wA73q0u.sGJZb1Bm0gh611BpWbURO_7ZldmoOr7VN2ZzNdQOv5INV5hQCCw_YVKyKTv5Emr8Sk6zHKrraxit44fGu8.WgMZqqi2GQJS5SbNE5KuJSzS9WkuUDiBpDyHXMZ_BCCODv_7EI4v7lPGcZbkV85arIa5DUXmtIyH_a_SAGuARc9cEUV47LqVOx4XZNYjEm_r8EWmaOSlMbQthCAU4479kUHmWmkLU0dwcQNq6nbptj8Gzex6mDZxBTZ7Hpzt27V1zIR7Kw",mdrd: "sbGC7NMgN7EaqqTN_8fJN6P.qqXf3N0PY.OxXgu1pcY-1739207911-1.2.1.1-BGaqJn343xaZrh1AWS3LPJHA0STLHzXPVqNFF8JciD6o148f7EjiWoVFi8EFG0iFTwpOANkpreepgJd4UGVJBq1P85tidVfvPkaF3mSOSpgHeOu2nhlxDsF_pSFxEd7inrZ383tzw8SfVmbYcBD3a5hSCHhqceTeKSo7s93w8EhQIXAashDYtRGht0i9yJtolw0DYdMjIbbTkPb_PA6zzGxqHpNvKgLVAQKCiaPVl4Wp4mLMCo3XM1hSB.PP.QqyKxh2MTZGNab0f1i3t.j48j2aLJMlWvqpvHIBRjICp3XC99NOj6e1i_vdZgmNxQid8LyJW4Cfyn2oFleCVAIqGR639ur3ewa7Y3MfxGET7cmhR.m0RMasnqQUVAI7MD5ejvAoC9.pBtfNpnt7aMl7azdt0vGntpZ_Nu.PQo2Dcv66Dovv4kIgYcmEK19MlKXMh0p_dawF8fv947rD0B5g5wYDFUXBV0UYNe2oy8HXaXgia.NwNgFha7gW8mOV0Eo.uwM0ggMzYAw.5nuMp7q4aJ_ZkPWQxHjKKoUGucWFfD9pWy5P7cBYDx2m2z.NDZXfH5U3IOwhUToQ0jY6JRiq71ZZVuG6DPD.lcQxHOdpwYRq_LXu3bHfJRPm1_E0wIGEZATVbeOzeDCf6qTXQt7vZtv_idgJkD2ygVoEPtBwx5Ak.yadxJVK43dczX1ZWKsOhKpufhfktXXGNerYujBFse6Q3m8J2IMzhQ5Qb6TZQCCZEHyHnL8bDp.Bf3d0acn1wpT9Vf08ViwsZlWfvRkucLOo9H9CXS4WUqsX5DlmK8SaO14IHHL57_XHDNpZrTw_BV9W5F9yOK4b4Zu3XyK6o8tjPBBKdbKAePTdTizBYIOarPI1igt.jEX8aqZWiiUX_baCvb6j5IfvmLgGHZHIgJ8oBF321P3rMGqeFUJjCs05VdIiiowi3UVDrzU73zLmHLGYwsxBnJ6z7695PtVWwVdmiUVIYzPMOw6YszH3.FmUDpA4FuoyWndzNP76bMnTNYUT1FxfIW9hL9A3iVX5qhxPpKYOVVpeQle4XzSLREV8__Z_XiDuEO3h8IH8WST.Vl7PIMGa_zojASKeMBbgmbt1etZedkARVPr3Ro5hWVTANnWXA3pQ_OS9hpUtdse9ElezpCtCZHqFcA3vpWut8An8LvHao7FRUDTQs3h01A14z_iKoNg0vaIZhquspbQpuA1mN1DutsALqrdws2gyr1X2XpM5_6vcrzzSEJivzIFMPZuBiPQgJXZPO5CBuM2L3LDW7UpflXXo46X16.RLNg2liNcPvA0WzoDXJF.sS.IpcdrhhEcsr6WNMCMliT3.MfQN5IzdHKsNoEw3bBEQrAY_KbHe.OeoCSi1GEGJQ_NVOmbZbepgNZpujqJoxpFz0hIdqH8YnIUTcmU8NG4rXQzwa3o8m._HX_dhlST7SOQ7NvOdak6LRX6AftED99YbqfUZ2poON5KoVMa22N4l5FaR7MWFdWBX46sHKwMdrS4npUxwz3ixqHyCw76D6xvL6W8vfvhpbh9HSGLiH7q1ULKNh96jUhtjfp2N5n0x_.YM8ySTGfDKy6Pzk69ZxNTJl6Gkuh9kNCSqgQu6brgTzWPILcmOi7VeFT9a80gYZraZlRfIzz8Eekf1qB7FTI8.eDomvH3eO3SqK7fIFoKcKF9LyHcJW2wA5LtekErpRMUAtqkN7nvFJw2WFGdZF7Dm0zHEqcgC0zNt9FKVWq70KbI_RhmifyyLhb_nMXqVmmkcpml7BnZnRGAwtz7mkbUf_uTTdsIRpR61JLRVwsnI.Z.xjBIj.OAD4mtfR_6OTHfQQF6d0w4kqJ51D594GA6wyiqTwK0mOCOqnc4zqjO8CA"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=90fdc2472c89c974';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\/885778236665?__cf_chl_rt_tk=dQ_WZLr387xaDdszQxarEOka7e7GFy5I970Eh8mKswU-1739207911-1.0.1.1-DqgBZF7hjX4tQH_uK8gBGOz6p785dNV0uNxtJtKr3Cc" + 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