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-8916374025-gov.caltech-edu.pp.ua/post/986478863707

  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-8916374025-gov.caltech-edu.pp.ua",cType: 'managed',cRay: '90fe5ebc2fef13b6',cH: 'kxClXYHiSAMcKrfonwUPQ2JHL3VpEHRwSii8qPHyA_I-1739214320-1.2.1.1-tofUomCGKcbYdjt3voCugi3L0KGB0ZevYPYoMHQfdkdRC7sO.2OvEfs.oj7rRjCL',cUPMDTk: "\/post\/986478863707?__cf_chl_tk=Cdi1PWeZcDxKSvG27toUk6EJEFSgrv0NVKhti4blSsY-1739214320-1.0.1.1-f7zg.lZ1ED_9sOFZaV1rSw9Kuk8AD8ZkjYgYBpqi6jw",cFPWv: 'g',cITimeS: '1739214320',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/post\/986478863707?__cf_chl_f_tk=Cdi1PWeZcDxKSvG27toUk6EJEFSgrv0NVKhti4blSsY-1739214320-1.0.1.1-f7zg.lZ1ED_9sOFZaV1rSw9Kuk8AD8ZkjYgYBpqi6jw",md: "wFz2a7teZVQVa4V92mbOzkE8OjUSVv.OJieK.riDF9E-1739214320-1.2.1.1-l.pHZ0YVvPZwopSN4NXCDjav1vS.MEMbNsTBraqq7BQGcx_RKR.LHcgi7_rnj4KB9arlpwd3ABe4uDpalT3.rP5nlhR03LJJ.QXWWU3Zk7K6lxcvrw5OdPPmec8pzVLhpz7idPyf.poxPe72jnoRZ4toBakLzIMnmot8f4kPQXrSeEFfslIsRfJKpkfPbi1ybTIDzxbAQsk2swko0E01zjX.sPcqu427XMk_2iS_m_VC2sEBigwfz0IBodNdGKJiy1o8z1wh3wSgq47mX51gGSd42jKkyAnOOIAbQGR9VgkWbD.FfGrA7GeVJ6kH4e6DNZB5kj3sjiiWrRRp89CUAJ0YhX6icAg4eLufi7LuozAxoYegNdv0HX9Iikr0bs9C4KGfy9LfujdleE8qRIzBKwjB.3kkSTBIpruz2miUa9N4rLYJLn1dlZx89Aznf5CypdKhJt3qVL5lCq2xiauQZqukv12pQmO7EqohgQzqBQebNvUS44Rju86r2Od4MFQtk9KY4zs1PERdsmHsC21xbPjcfZJ.MbE1rZO3R6xM3D2qwWa8W6UEGfiAhDHSOmtrLYKr23D2zcgYOCnkEjIQoF48QaU0wPq0BEyC9FL8aMpY5v8vMzB66WGSdOpHdgNrM0KcjgBEp4m50H2uA9Vy_r4H9UvGFgUX55_uGEQuKqvceVTiW6UZouYcwnqWLf0x5FUYN_Yzc1F_TzrDYOjLDdneZ_hNNXPHT7YyUUOT2jQvDDTz.qJDFbJeVUzgV_zXmbwDjU7rMzAxk3IaI32BxF..7bFm.CHUcEmB_5MjIO854AtvQZkpR7lLunAtPexnmTEq4ZAcHyVZR7RgjmNcPSKjt.evrSOW3RmRaWHxtKDmtLDFG.a8DCX51xryl3_euKC.5M.t7K0IkHzEMTYz3v9aTOdBQ6NtqD3DkaW2LsEX2lgRgZFNs06QTJpRZ.fRvt.1RAjykdKYgF2XpTVDv_8ZumVsLoDUNDtks9rbPH80gpKp6RJgPMvDyj3r1tXQ1rcoCjTvO3bcKvCzSd.Se9MqiCRGzEuWPROUqNXkGl.ZdBfd7Yh4XcGI8DDMbZuh7Ki4yd1dX_lkRcGLvjtcgU1Yq97BHyfNeNzcB5ATJFlFsRr.cBSHlHjTdsPqlq05j_H76t3CYzAEORAUzMbESEhsCY_R5e70yU9jVrSutU8txooJborc9gPYZK9EzdAH10ulVFOxMYs771CoWWtxyie4qLfUzS_gHokAN0.zKTtrPQjo5u6h12PAMcGDx.IeE3dTwwG_BJOMpmfGw0NHLAByoDj5rrJnGAwl4Pbl.J0LeHqrEiHQzl2Jk6qPn_to.UFHfDmRBEEihH9thEh_9Nc6fI_lvhmNuzUqR9cx9u79K66NEGSbCpVz4ErGnSFCUmQAReQSndvV8twPTPVnzVb9yO8zEuHNmJsgtEd3YEWAhGQVibXcdU2lDW5iE_LJzjYdNZLe2E7TLfRQBbawjN9QjGD0nJScITjCqTMNwam_1IFXVQkA_8mZxcE04mjCy.sqZ77d8_pJmBkTlzYixIF0cYNstqoq1qGbOkCtiRgidTZFU3ZRL.fZm8mcyvOzIIY_70NGsEyk6jU.FV.mDV1F1Htr2.4uhas69ZCnnsjwugBlejMd07IvFf8mjkzZ4QJrtuegixlPCUO.U.XPT43X9oc8dlWfk_CFzjxYoa0c5m_20UeATbizjKp6deShBQRZ4Cp6VNJSH0zERmbMljHZpX92bmq.KiCYMResZbekymW3.PAKvsoSh95dAwCJMQLGG8M9_0P1M_xEb9Tq2evSumopx9IcXzDtZ4m9K8r19gApzEUixYsN8HGIbYRuX_Ev2OHCWrdm6vzV2JsldV09KuFf_E4r3xFMOI_KXnF2Mb0MpEHBsZ2bDpuJpQUQRPMTQqutJ4gbHLOoJIik.82hgA6auPQxsZNBn26XabUR7siu8vaHQmSJlyRj08j2CcnmTuNM120dI7nfRzEahUwFzDy8PPHDM.vQMo3YTOJrHvI6T9cK1MIOqV29r6w1nu80c7yMhuo8PriKolH7avr44R..iC.4i60Ug.B9FLg4hRLhBHD7_x9D12.6uv3.u1YYYs.RICaOgqHxjufH4BcZYSwXL4aUvlWeEr1jlN9hFIgHCnhSAVJIF7GDJ24LGcFNo1ZJmrcGuh8fUxspD6xGJZw8WRAy.gbGN29RRFXFGeb1197WLp1ejbNl6.v1ZR9ZprkUHgxfDQlrFDyCHw",mdrd: "IpbaBfM7LYF_5AjNfUdEIlMeUV_RkqW5O9gBkQLqHr0-1739214320-1.2.1.1-ebsYf6rGJfGZfgAXrPFH0cLhM.FuD6eldpFf4xc7gxtdpsGsactKjL7.8aOJR9WoUqR1XZ3eWfkoIHKM5HWdpbBXx.dtIgxh4nBaUsoQ_Q4Wrz3KXG4pSMp9V.log45NInuBuOJ_g5ZWGaVzxCfnzy6vN2bn.GfA_YbeMIo_BVplHfs6_shdSFfYqDvVP_.wLa4aAe39x3W_Jkp7cqtcHczRpGaDIqidGsznHyvE1MGHmpS6O58g4BPtX3nRJ1G8NDgJfCIZItz0agudY_q1WzOwOs0D5bJP0xgU4vxHTOeD.pgJkO88hHz6nqqBc_VrlIDTgO_0jqztqJ81VcXTHgvoO5otub__G7kmQtelZAZMoJAAjJMNNqGXeW9QfS7.GCrly93Psp35fEMvd4vAx3cFY80N8hUawrUdY_37Kh4oosn2bWZmyadvSp1SQfP8jUZR7R5vSqWZxijTwIbmC0DZ2Q.xeiUcBadaCbOFkKgnXIiNYERwTvGRtbYuWiq6mY_8fN9HzCbDKFyi3kAhp3USO4MBRFV1eS9VEoAQdJ4_5kDbHHrP9mM8Q.YY89CAjMJgRcaNeymyE8H1.CJK38XCar0KqcqITpX080JKrbSMwZKEn.boUwUvJIT69PWQuJXg0GX0uFVXp5GW_PMMnKzfGU9Wj8dChmeZMST5tZkvAJjjIeIA4xXpFz5wL3jQE4j4_QeMgXqqISKdgsSu45KXfsiyK1jlqZh_M62rGs5oHaA_RjgnmRQd63DCjz7n9qT0.YCkDPQjJ65IWvs8makTdcISTyE6ut98oD8_6_TEZH54Cy4sctXDowFj9F4l9_sYSStC9scLt1ST7ElVpMd7Ym07eEY075YKo3EH7mIeM5ACF4x2nBuK2NI2PwvluoilTdksls5ZGzeiM.4i024O6vgJZW0WazX1Shp1ilZ3XJ5KvP2KOsISq.ImAn6mD7WgNR4N4Q6HyVEBF_2W0H3TR6Ed1hMNAM_XcEnMZsh1erEim6bVKlXK3R840K670F_yloZpvLgu5t9U.jYYaxxpkPKj9NwWVqGs5idrByydF4RiFebm.sTHrzqtzgQ2QbUOrdOGSGGIQyL7zA9hTq_YAFeQj4fUf.A_4I22ZPF_OV9zYNNjAxIsiSjKPMuk_lkxguHEOZjn9kSpYtZIPvmxhrWuB_lf.EMtwkIoauNGSEpr4GqH1S..HPqZyShoQX37BWdGAII6Ij.DWo27vzvPvoDlA8Zkl.WMbiZ_B1ocScjKe.CAAQYbE9_cdf6_lDOewtKmJXnttx.4TvnxRSeE2QzTuVZ73pVVyGuU1ZD55HSfHBmoAdS49S5YqTyls91cQCqy_jStfOFfSWsYzGkWc8YROdJsO_qLx8tNIxdW2EXabvM8zd.Qlqtb4n9XdgR_MHKXX3xl3X7NxLVLiJmLyNt3BZW4pQoRqev9eXbxVEBthqqF0VMNuVbqaXXlQx8G7YiaesH.n7PRj2KbPNijElzp3V4SAVI5mItsN9wCs9tZTG3UJE8xIuU2472vzZOOZ1Iva6AshY4l3eEp6nV4eBY5nBy.hV2VOggOoFwnA63FhOCPODPSCtxvMSydHAbUiuMia_Q8vqNe_RA0TjOnA3NON0zuv5KHysDOgihHaX2l5_IWsR_DIPYSx4gy6YYSjx7wETbO6TCLolLZntjTEFhuIm2nigl3OO4kurI2WrtywCb8pb2OmNmr2gqjpPjJfAcLdtufIMyZn4WDnRfrM0jmNHYyY1mszWjcFAZhsh7cTjlZzOnaDUmhwcXF9DPCWe3YznhaiN4Nn18FcjSHsGUtRQ8j11YiRWr_0OhDUQEWRup2CdL95zEv80yk"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=90fe5ebc2fef13b6';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\/986478863707?__cf_chl_rt_tk=Cdi1PWeZcDxKSvG27toUk6EJEFSgrv0NVKhti4blSsY-1739214320-1.0.1.1-f7zg.lZ1ED_9sOFZaV1rSw9Kuk8AD8ZkjYgYBpqi6jw" + 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