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-2836417095-gov.caltech-edu.pp.ua/post/605640990180

  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-2836417095-gov.caltech-edu.pp.ua",cType: 'managed',cRay: '9100ea4cdc6cc58d',cH: 'bXG8q0WBFAtK5Z8E4RGlB5EJfCMIlM.yobMh4coDCO8-1739241008-1.2.1.1-bitytFBmSX.pxbZ8kfr7AmQimppWOYLC9OHQdHpOFvk.vJZaedRcoo.uRkOlMIlU',cUPMDTk: "\/post\/605640990180?__cf_chl_tk=cMyuLbnjlqmxb1rQtczJqDFGYopDSX9NlE.STCDzYpE-1739241008-1.0.1.1-VKaBFgdFcIN1LG7dLvHJaQk8fmgp0gaE3.YUQ0MzjI4",cFPWv: 'g',cITimeS: '1739241008',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/post\/605640990180?__cf_chl_f_tk=cMyuLbnjlqmxb1rQtczJqDFGYopDSX9NlE.STCDzYpE-1739241008-1.0.1.1-VKaBFgdFcIN1LG7dLvHJaQk8fmgp0gaE3.YUQ0MzjI4",md: "._xHqD4KPB7QgT_drAYe7wPS7EH41zA57DlqtvXqQ00-1739241008-1.2.1.1-gcxO4EJVZNprcYUw0QyJXZPQjO1EOvQIDxVSuShlOSGNJe_F7VWyvBMDLwGHLS0iGEcaStwIUxHzF54yEN_PAn.EWI1mqO2gwEal.gCur6Mh1prGGE5TaQmT4SGe54Vqj.LxMZ25V591NDhW_Bo1UnkK0YiOP.0DMrIbs2qn8PsuDmLuJujpOCewz.6nx1F.vG0jwfdq2hHYC9pl_n2TzGqJm2vXJk4Sux3zZr3KhpIXYHgucsHcDZZuAcAvu2Pl4Jb73Xsv1f1M37k7J.Eb5bPFJcAenZcJ3q8b1QwvZT9aOSMpsZGq7WOMMGXXXTeqsWeqH6n5Uzl7rmJDkBnFyG4Of64MRPg.ziBlfJ88JWBaAQkXlJKJqbyonRAMLLJIWGZbjWnqB5SJ8LnJN9KKDdpZLg73qfTO2XiYftv5rP3_oLdYsrqhuGh78f.gUIRbJSieBBprnJoloMJvZXLPEda7cZ2cI2thrG5axlvkLEhM45Ojc.7vSCrvpPyVeEiONC3s2fEHGV1IcMQh47zdSy1NMdvjXB9XcvdUMCx8HLD4wQKy4z_iFeSUptaOgCOhMFl2hyaYqjaQVw2OmRem1AAloPqm871uWCx2NLbtnpvXPOoSmRFGcX.qy_5ZLwraiHatJv4D7TSGEPKNYr_d3N9RWvVsmkuviS991GCngfQN1r8y9OMoI9jBzWnGBz8cYy6RO9hCGv_NF7YeUkzMKogBZqp.YvAkJzipe2lYWW7DCfU0RUTI0HqTkl5XFyHALNR0HnsakS7Bns.dhzZaXnmNMn3bfUvLCyt8dkFc0mbuNQfCRywtwjfpU6C5OgLtnQEV7F.ETXmfxTWiUD4DtAOOCbWfwb0EYsvP9UHuP2kcZF9QRbJshFXgz_VjRvorj6ZQR1EzWCF.7609P937KjLkRJXUeks1I7keKnHxerZm4T6MDXY3VJ3.ldrriT2GKzZ0YGie3WYHEuidaYieoRN0CKa7ZXgfpDB7l.1HliOVtpPDcxIqNKuKbjxGidaelrGAcWcTZqzCMY6D0paamKpX5TKU0FhFT2hR.WYEpB17uLB7p8mGE60dFhbM1DP7PX60_3wUQxA9dbgJRhLSZo75gFfuApzytv0b1vlfzx2wZwvZ2d5dyxfO1lciaCaf93IIWQHZ3N0bV_byHUx2q7JC.Eci19KOT4NviISPO8okGjsCTx9NxAKhUQl619836ueGyxdxVtdToMvxxBUy2dESy3DhMbAMsN6Gvci.7m9rBt9xP_NKtPCgZS9NaOBCP02HoQOuaEzHqpW1qjw_cPU_LJ46GqhweWn9YGmC92UnPZpmMzGsD6QJ4yreK2ah_qTXxG4bb9_gQqvg62colo.YdiUYHJf1yKUYvnyH4YOFNS8RjpiFmodQPjjJKkD7C9F4IB1UttyTDIJGvSjpbpueXDHzOsJR74ZcSRWTQt55gLUpXXsQ23eDM3opJPjPqveddo32PJ8gok7P0aV4E3FyP3ppSrq_5_hA3eMuqHI4lTxwyA9XGmE.yVLhvYtZyoIHgFZuWBIYQjPzFFLmS6Qx.Mr8ijcUNFEg3nIy1znR0Bw7JyCsEJ4drJNTQl4ITOMwMp8it90IMz9nGpNbCm.5CnGurEqWICNDTuBlZyQ9_F.NjbMAXOm77_TE2FLByZ9M29NT2UZ1BCxsS8fWj4clG69W2rM4l0h4__roa6EVI48pvMy7IqEMX4pjt3Z0HaXq9aYU6HoTzMWtVeEuDaFl_QFq5R0jPs9vMALBe5BwvoH6GiU8Wmr.2geWkdE76xfKhT0vWZiN4ZQMS14JGKtxJpizCOykqwC9xmJyzyrn.nal8IlPD29xfrsuwczo_AU5PnfUpgvPt3XTnbrRZe1VQbKMMYtxr3tRlXlld5B6G3qzz0TsS_6fa1b9cGmzvOm6c7czZHXoZGslNqSpG6oO.DTNmuG_JiWSBp08NQFiwYHrzpWletmNXc68Q7b.TfugDvZC4GTsqWlSC6X4l9dNl1g8VAKuQ9Vn0dQzUIj3KYkYW2.KhG8Lh0nstKBhHkPKr2Dk2Dr1iZQsTCAPGjR2S.BG6l3YVz4MUJm.4kAtVev7_Ch_VuYhnHibvHUDIW3myvvVUT8v2EYiKPALQu9cMnd.qqrCdtf_ZZmVS9PuatV8azXLEjAGdimpDkl.5F4OUKZ2yJHMy4NUMIrsQTnkrDTA09FKf8xhFdHN0wWFHUb.yql0Kt0ASp7czHkLS_5qY4VzuYsrSVuzdmQ2Gw",mdrd: "zq7CNb0jTQXKzgL.hVX7wQWFBicJLm5DkZEydJ5MEZ0-1739241008-1.2.1.1-pW1jjZ1ieZsdvXCC55eT7C1Lq8B36PEGILTnOXSB8mZw5kMUwd7Sq2RskGPBVINlr2__XQk8ZCic6cvotSCOJh53NhBvgDl49gmqEIeexNYAUpv0A9_ihESD2f6QhIgsaw8R3Qt55YW3iY6CZg.DsLWJjpR1vTmL6neb0DO2afPZ7xbrknWH0xciwb2CYyc3Qn_n0WR1KCdULH1Eq4TI9NVdU.w8BPl.m5diXKRtWWlgspo6MCOtD91oNUs.4Q44imSxMOKV5XXVQ.hqzEsqRZZKr_NAQXNjneUgFuAtB6O7AU4Qt5L5ZRtNabdk7sJYn9VvdTUKSPILZycHXV4bGhmo9rOe1g7thahb71DnSfVaSj1Qhz1VnIQHm.r5irruXMf.E3ZgmAObig1KgkyHxftDIqypOUdI3ZDoCg9oVwjd4amQ3MsV46alosa7EXNq6gDhAs5gLuJj6061qEMy0.YAhArOYy5UMne_ECzXWaLv9zcL2iIjT.9yDWjKtiLZmyIVkZjLXzvGrkz0VNFJxHKwsL3NED6iQh3oEKmhWzOzMhosbXHq2w.fSyO4Dpl0CjMM1oJ6KG35nPsiHDNdwxZ838xM0mnexe3N3R6urAzaK61Rwwrgf195GzPh2sTLnpiGymDfNCFna3bXqIeWrQl5ptrfByrx3n2sEmoLsyjRSqChJjndYDTg8tYcBeFmfOiPrdjwHfxSZxzkqFZWuActWqDd9UBctcnydRDmt5drtwU3nvi9tviTJzpVt1ebRJfpsaPaNiEzpoLwTat0LAlLzmN7SpRgt4TRjhsJBqfGFnqHJim28RnAwD17wp37WgK_mEwh9BpJbTJVmFZu.jKpGet9u6xgzjiOwYK7ueJb6fffDsqb1DAeTHITPbUKGQFrLWiFYd3NIY9Vv3DOsWVFfIIHG3cyrit38cVndyef4hy1.nE4AppQEq0EvM812TfiGbcOb7lz3lc.x8mMnNNRYZm5oOYpWcNwMJFjhG8y3zdSXiRQWBxmntgMQ6Wwd8glzznHC7dU86pEGfMCvswK7yc4vlYuVpbXOd4kyG5Hjr1KiiAxvgOS_D2rwEV5dZ5oqm.knRpR5THeNhhhwcNjVn96N4tuN02clcl7vRD3DheCnCmheCp0FTODj4YuavWi7zVC63_5ASWLnX6EscYweVp75TbxGNjqIHAFeBIq_DaUckjs1wJ0rlprbML_ePKA3ACfC__NU5VQqt_77vZD2LbZq6JLOmj2ZpzqOxa2NX7ivu58yAi_RcX.rDuzb0fBFspT2Bhu_pPSW9czJAQGl5AaM_dY_l6WCOG1UsXqBZ2b4w1.9_OLe288wvzlu29rTf6XMCs1kt2TQ0KrmiJcgVKb.eyTgexcSxNtzWv4_uAOiplynWrWxReimGVsGBHq.VXoMhrhfaBtBQ0LFe3mtEXj8B7j5TDTK9BDJBcV5EtIqzUo0lFDifiN4pQWsKD2BuhVfzPr_.8zneEVXmUUQojqVQ55rq30.u_p1XX8TtZ1KU8hRS6R0qS61.DTUG1bIi6IRsxtSIkeH9TstR70CE6kLVsjYy5ChmFgjNh_8ox8Dxw1LWptgAz4Ju5uoDBcI4vkrrWIGrruxJIPit1pIBIcLXQE6fOZAF_snpM_pjn7PLvTz7lwAS_RwyUCMD29S8YhJXSiVzMcxNr9kRdndcvWVYn.XBhX6hmE5wop052c3T6WsdqWmJGOadBa5_znnyS9_WNWn8KyvoUtmFIxljr1HbiIZp07yuG6sgeDrlbr8FrZeVwF8lmJ93kpst13biq9S2OuVFZpSR7NGhOxcNqcI1SurZAliYMtu1bY3N5Wwkal1WeO2GkU.vqf"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=9100ea4cdc6cc58d';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\/605640990180?__cf_chl_rt_tk=cMyuLbnjlqmxb1rQtczJqDFGYopDSX9NlE.STCDzYpE-1739241008-1.0.1.1-VKaBFgdFcIN1LG7dLvHJaQk8fmgp0gaE3.YUQ0MzjI4" + 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