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-8725364109-gov.caltech-edu.pp.ua/post/9106743852

  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-8725364109-gov.caltech-edu.pp.ua",cType: 'managed',cRay: '90fe95fe29cb81f7',cH: 'ZlJ5dRw484e0f4KGJnEH2p8lJaLN_qu8jMfWOf5ID.M-1739216583-1.2.1.1-o82FiNo5Gz4SBKhrIHLLIlYaLYBSFDS6CWKPXoyq0uwAySvd8V1nZo5mzMc2SjTj',cUPMDTk: "\/post\/9106743852?__cf_chl_tk=BbwtCfw9_DUVqZfdBGAd57MquLNC0.XH2kN.sccMKls-1739216583-1.0.1.1-FnFtGnqdkIqyzQwhWOp0zt4y0yXbnDXLQ4pOGwlkam0",cFPWv: 'g',cITimeS: '1739216583',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/post\/9106743852?__cf_chl_f_tk=BbwtCfw9_DUVqZfdBGAd57MquLNC0.XH2kN.sccMKls-1739216583-1.0.1.1-FnFtGnqdkIqyzQwhWOp0zt4y0yXbnDXLQ4pOGwlkam0",md: "wX3x.miuv1qyQYjSCQ.NDsSvpp8rClgVvzepAsgZams-1739216583-1.2.1.1-lOChlNGwSO2YDKh0070fhURkIl6xnP0Mz3id9WVhOo1QpWI2FkgzpJhk6DuWc.v0zYkArk4sinqjMXcU4d3zztP4QavJMsev1RFu8ced2tDvMUDuqM68JIJvG0MYThtlScvC86p6lBY86_lCd9BXlbkIv_CmBXz9XI4a6JVZu.gnbDnp_lywRhNqaA7gW63vV8farcY3JeeNYZGZyYSBRgffwy6UZn_31aRmH8TLRCXPEABl1D.px5VDKG0aSB2E9xKAcIDKfMPw7qpngiLooAjPWfdUQ.2NUsJt1G6snCkA9Tysh9GW1ZFjHzqMDc5xuCFEUktwIQjcpvrJiAL0A0XtIfzKixI1KrOZCYlcf2xiYKfFrs6mdRr5Df2evDNImSnaIuSzjgz5jZ7xkJgv.vFxsbkKUoQ_z4.UNTUxNGzr5kD_mtg4st05svp7vMQLEU0iavbd3nvDHXWmJoVR1oI7Y_vymPpT5hZy3w9jc6iOYNIbt2kFT7JZPiMBpG6t1GTf0yxLzAymQpAECXf1s6PvtoFyB9.QhgfYvWur9Ajje5ktnB38PwG5PHw7ZYgfHw5Mb.slhcLQmDTKBURObBMVT3xnK4rfTVy_LBB9_bylGeOWnPH8uOX.H.Gu_9FN2Dt2.Jz7G.UYlhZB7801FajK4Mds38awoL5beDbf6eJnCJ2tZ5B7CUmFd91Hr5AF8JBBJZ2YSgbRbNdAf4X.E18TRlUDB4gXJUVbDbOC9JUS6V8NuMYXI8ZdLsY4igqlm0ziGe2JMax.BERtu4qBGaxZBlYjN5oAd8ZCoV6SVsFgVhhCdU_Hxdh6Z52MxOA4r66M585yv9si9ms14iWFSvngVX_Bj948zX5JyIjo7jLfD_fj1uEdReeZAhqf1zsKsGHT2EsQ3dp_vXNDZKpAVV1Enbo7BH_73qyFelBo7EvYwF6anRsHUfbztLcJm19NOxwB.9FcY50PoQ8RkghfE7mmzbvmJji6gaarY_qbnTOaWG8V2NThzGGQC4QcJFOKhxjwJk02UFfVtjiv_VpKrZ3ZRKoDphuNMCCQ4Dlmfcu1IVEtjNRy3z9BYOp7buMMWvZgRHFC7DLRlL.gxWyLvMqXwwtSnmtwfC0JNSzgrbO2Lpq5kvye3I2F01lqjDkr6dPu_X721VVxvZ7g9pfW2T.cMd_ZUo_EL6jhizdn5ufVBwHCot6O7Ez_yO_akOk_OWi9ZRtGOuZ6keAn5wIX2b2_hDtaMTrzrg68X17QFa6dQVlwfRxSFnJqHw_1p7pdKlZ3f3yfkXjtYQG5l3HJsmTo43VZ3aTHV6QY_R.br0kzMLmZp_0iiXosp5OleZV12A87LdqpZXokgxn8DJm1dJyQMpCWXzGmpvVaJyMHj9CN8VeVaFiZlINtcHBuS40t4Luq7DIrZe7pinPLmDKkfzpCaeP0G6ZQJ4EWVNErjcExJf30qjwKdmUssVD0KRY0GgnHdL3UbQ09LxqSUN2qV8WuK0ovJgeTly1FnWnvC0nI_DKZYD1jr7uP0kiFzZx2BohiaAzh4Krylnbjzeq.HoNyOcOkql9OyMGM62FV4cSMfSFJ44A6RKCFFYSuuXvaN19IgTajdWdZjk.1uV4fFV0y7j9p_ZDbzRtSQYrZkHQjC1hrIQYqQm4r0sRYgfBbVWLTUmtw6oqe74xn5SdXqNvqMRbxz2ynMVRpHuVcz3cVNQbHeC8IhI1dNEXepk3YaIYD5EQY67u68jaVPXRMvthTiJ6avC12S3K6oDrFaPnaBeaeZZWFklM03lQ0GBAQRqHaAHKL08utDnETlHfj5stLkmnbZ70wRlp6KQuEruU0z4PgNPR0Jvn90AN25B8onl.6e.lCp1jEptU4oRabke_7nkqWGmyumSZ1Ia2O2eFEx8jPeJ.ip7TfA0Ei9HjK_LHg4rbYcQNBlt7gwBKdDIWLxhzU6VGMneBhbOHTvgjn.zeklGyuCQI6YndE7XZ_hcM_hxLIu.JOUyTn8xuA_r74oC9jef3ZC2Rt887T.5FWCyC.dGeiXvK97EQtUqpWxesY00HJWLCW8Bu_GV_46AZq2G5AQLYf4vd6XdzKThhlspx0ufzksQCDqjEgigxUjeIRof8.Qn1SR5oKhrNqr37lED0rc5mXjfD4SxwvzzmSvC.ZArSrYpvyRLDjup7TkAcoxsINhwbr6gwu_CR9zPCmXfZt4Ff0iPYKdSzLfc1kl5_E0HPyeef6zddAwCBb_WechY8xMvNBe3U3NGbJwg",mdrd: "sOJnTfM8VWGA31v2t6zTYPzT6uuwazOAFnsau1AyiKA-1739216583-1.2.1.1-Fw2nYiB4ONz4GI.qPlhiZ3uQknG9ONrb2ehz3xow8ou8jRRvrJfxDhxVIVKGeQD5q_Uab8xiPGAhKkIO.6ZpslmGTuDzxItabdTIQUOfphr_Sxya.xSgaSew.nh4JMUJOkqzbRU_xv0iuKySvzcgHkk0alZf5PEKWLni_YPRH1BlaUkJlTzcXDXvUYdZErbT5uSq34a0XB3jZoVTwWkaUCTOt3vWQyWrue5sPt6EgvffGjE1.vU2PgEBwzzuC_dH6tkxIg2Gg0GcvIAMce5zzrsSQBIRjvxUTW02mqnN2lvDxWosZIR4pofAKiHtsU8awcmz1z02b3ZtCsQ2ZDjSqtVSHGNcBxv6DN8Dgb47lTABphSFTTprDrBNGjnvQagWq7q4SynzR84q8PZ5IyUZQJFzMLIGKrJ7gu0CcEN8wFQCNYYULpqxNaY5xhOHTMKF7EfMMVdz4RJ6d3XEKeInNzZoujZHstDdTyU7UqEdXTdopE7b4t68NR2zcRV2L4mWz0WpcGjqtiAaou5mGESHVTw8OmiHajixjAocz9huqyOHx3fFUp2ru0b7cACkkUgnwzrw9ZvSaocW1qpxa1doSmFMUIYcwwjg5jEQkmPneNcjO.UBYsqPzL7AFLwcR99yxbNpx8UuXriyvBNkIdltYCAav15fq7YrtrP0Rgq0qpC.mDOq8XWZCKUBhVRYURBicDGUbafJiWSVYzgBJn_6jmxj8j.wB8Im33oZrvi1tgLJN4xwgffaJbv5zBP2B5Tnp8HRSDUUM92njYGe6H74LFwyWAKlx3Zv8bqgiWDSKwk.7_hizcYn_E6HQwFN5OqiWC2zY_vsHmuw5CNjFJnFy5UrjJpCPainqM1N2hKCcQ9Wib91MDtG9QSinvXSUvP5bCRqVqu_2QZEAUFcKDHmUmtZooopI8AtHSuDvM2X.CLwOtn6XFY3AUPi1.wJ0_5ZeNYLbyWAh8xM53lEwFyI_o6q4jAKAJnSRAJ.LVEmr2Cp2o3WD2q9U99EPvz0sEy_cH_JCZYHcwn47iwrgVObAkFVk.Dx94ysHIhwDzVTQhePN2O90nLB_mmMgmXc72chyTOkhE3n8Wp74X15P6DQ5P.YTaPseBr5biaZ61IBFTHjdhnwbmtJJyzDOcpP7Zpm3AkyhmOQqmgiEnPjObWpYhMuFjNGB0._x8E0lQqRl6JjwbTMrZcnK0jAngSXcYNmtNYd2wlYR64VBE.p_AVWqkJ2lx80tbR_pz1a1hUg7ichjDATluX4I29w3G98PpAbdWc6RTCWxADu6mtm72fLmlwCGsSvTyti0CVzgttUBVhY_RGXhJo5wOMt_P38zF9QQ7jZylVvSPCrS_i8mXCZJuKdPt.OL8lm0sokczDjUnpNQAlK0kDG.Hq4Mn6lBOXgoS1spOAofYTutIr0Pf1jn9Q0U6wwTx8F.Vr4bdp63sIvtiJ_CKZVvZ6gCgJDu_RUDoBQv5F.UFgvdQ5QC3DNqLVpZa0ZtRnDhCP57M7zJHvMfXzyB0tPkOlje7x_.grBIvwpkymJN0QzfsB7VuQaUdBbhr26v64UTEgqmOlb7LHKKTXp_22TczVyAIkI5C4HGcmalR73OrnmUUmDHT3JL5B27lxWe2ZarlznokMIEZM_QTjBE5OmpNLGY0h3uVBQvoCmsGnf25TgeBde8C9DuQ6I0w2lULB8HV0oIq1z3f1E._1cMUjaYARVZ8F_GoxVnqteSrOwL12tVhAuQWHmm_sUnvTt5iHnDNWWDFkN_5DqKPjxuJmCioFz36CzWWBby_cwtL8_ESLHbMv0aWRADOUAxbH7NX_NXwhN_NuYxYJF_hzbY2mz.2e721bMwHAS"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=90fe95fe29cb81f7';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\/9106743852?__cf_chl_rt_tk=BbwtCfw9_DUVqZfdBGAd57MquLNC0.XH2kN.sccMKls-1739216583-1.0.1.1-FnFtGnqdkIqyzQwhWOp0zt4y0yXbnDXLQ4pOGwlkam0" + 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