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-0461283975-gov.caltech-edu.pp.ua/post/0461283975

  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,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHdpZHRoPSIzMiIgaGVpZ2h0PSIzMiIgZmlsbD0ibm9uZSI+PHBhdGggZmlsbD0iI0IyMEYwMyIgZD0iTTE2IDNhMTMgMTMgMCAxIDAgMTMgMTNBMTMuMDE1IDEzLjAxNSAwIDAgMCAxNiAzbTAgMjRhMTEgMTEgMCAxIDEgMTEtMTEgMTEuMDEgMTEuMDEgMCAwIDEtMTEgMTEiLz48cGF0aCBmaWxsPSIjQjIwRjAzIiBkPSJNMTcuMDM4IDE4LjYxNUgxNC44N0wxNC41NjMgOS41aDIuNzgzem0tMS4wODQgMS40MjdxLjY2IDAgMS4wNTcuMzg4LjQwNy4zODkuNDA3Ljk5NCAwIC41OTYtLjQwNy45ODQtLjM5Ny4zOS0xLjA1Ny4zODktLjY1IDAtMS4wNTYtLjM4OS0uMzk4LS4zODktLjM5OC0uOTg0IDAtLjU5Ny4zOTgtLjk4NS40MDYtLjM5NyAxLjA1Ni0uMzk3Ii8+PC9zdmc+);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-0461283975-gov.caltech-edu.pp.ua",cType: 'managed',cRay: '90f9f455ac0f8790',cH: 'udo2hfpxFAnkiolFlNk.xe603vnBS8zhAzCqV_O.M6U-1739168018-1.2.1.1-L2ns77Tg3.tVIRfj5jxLwuoiSewhqJ0_L8DpTrf3S4HzQePeKrHiii6juy4XsPmj',cUPMDTk: "\/post\/0461283975?__cf_chl_tk=MFU921RB4XiWu7ZDDnc.edjrL4AmNczBpjy2dUbmhWo-1739168018-1.0.1.1-j4Tdm6Oz1WKMhGwD4WtRwUhGVfVW6xzrYHOoVJPyE48",cFPWv: 'g',cITimeS: '1739168018',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/post\/0461283975?__cf_chl_f_tk=MFU921RB4XiWu7ZDDnc.edjrL4AmNczBpjy2dUbmhWo-1739168018-1.0.1.1-j4Tdm6Oz1WKMhGwD4WtRwUhGVfVW6xzrYHOoVJPyE48",md: "HkdK48yRB7Q3lxlEcFp4Q0ucvuU7QppCF1A3Vw6m1vs-1739168018-1.2.1.1-rB_8U9PgaBaXLk7roe3A0O8.i4_leFY7PcftCFRdTou0uv1LcmOq0dcL2eBdXOdAIl.wIsgEuDtchrHk8HWy8VO4euHbAdzkCRvUWtwoDG2AWX.Q7rgrHEVWFlER5HQrWu1QW9Y3iwk3Q5g9BPV94th42utk5rJN3xtUazV0HrurqrG1Fio1tqiY6ZLUQjTQ2gf6CLDZlWgATP3D3QHVQawAG68Bwh4GuFmtJ140fdRfXiAQImoL5MBFBDNTE46p_WzwbDJY_YEwHJ05jwZhnB1qmVrVMQCiC6CbWSrMueEJJveWpwaGXIlxU4WmKglbnT6mE.Cydi8jQ7jstkDr8qtxukzGahtMsiU49UDETIVQvEwXIpuW8YTxpeErMJl6pNspC3eA3PRvoiwDhzrH43RhEz3XJsjNfPSdLDGfaBcrHTKeZak95Vgb1QHX6OQZWy1ANWj4s4qcVXFbuBIqwFNNoQ5Qe1sgUjkqFTIHDJ9HBzzl2giFNfrUf.k7.WUNzEyxBC1p4jSx0yVkxsnAw00f6BSWLFhtU35GnXDhd7mAigd3ZIxms_UK.i.CIx8nrry3Ira2B6.vbDs_UaUnA7enz1eC2lbsE.nq17pmx2_eEOCAxxe2i.eQ38Gqtx3dPs0R7CrXcqyfjk8lCkPq1sNbaIBELLWiJMvzqOMzMZp98MBtph5XII2cliEMHa.v.VSrZZcL0PNzo_bCdE6YWd.fUuySWytL1NZwUpI.0_sO7NZ8DMVDY1fbF_mHgOzBhmvuIE8TJivnH7pMPBtTYz9ShxfE9IRcv0o0bUuspkvGr3bw0ITBLK1vu.oFIU4UlH46uwtbWKCMQhflwiLy4jGMctvPN1yUxcKTbqdmQpEEdW5exwq_ODE4KJRHumtEDjMKdTEyvh9IZleiy9xcycohzt582rG9e8K.h7lG4NvYi626VydGw62qmsMRps6HOxlMTsdOXdaKsmzx2y2Hq52QE_cf7yU4HpSCpBy1lHKVLwm5pjo.vcCI10bHp4zFGOvku90Ivjsbr5edmMbzzf3cS1EcmctSSL8z4ZkAABU6hLR1Y8M1BZxaUqLVbGKHBgaUBmJb8oGDxQFB_dZKQ2yEe.cs3.AlWRnlQ7X63LOrQJAfpS8PwHM90CuZjNBMmxSjLIFgTJ8NKoNlvhBI14OfOoDmM7HhFunOC2Pxh211_1ETfKHh8jOBcec1IU.twIKyeZuc4VQvg..BBIjyvcxOuFQkLBqeJykkfUOvVH_P4Bjhb6rl5kyI3KhHiIhf2sdURQnbHz92SEHnVE1oo0LHGSbfZdLMES6A.v9RGnCC.K0YPqorxK0dIxuzGIBUDOKZFX_22EPkY7IP2hIJmlmOAv7JidNaoiyWbMJjV0aHsstcFoUDlBWA9IfHIdQB4fN1ffvBtdISfTBAEp5p.NWXrGG8Uo6C9NH0zpmM8l82HYlO6ptO8VJe6RohSVvsad2wPlWxKiZGpTg07Rwz3_wKNofZztuy7pe6v2GbX6X3BOl_OwhRrmxG9hlJEDabKOJ8qXQ96z5Y3CuPRblHT3EDecIus1QDSDaSu0neO1nvKBrAuZCq3WPIggJUchWj_e2KgsyPt.nV.4ZxhiFU0g_cDjLxpb8xC01Dhv3vocaXArhFfwuvtz7lEr6cHHK2L5fp7B1NgljfjZImbP1qaLCU95fbM_cM6sCsiRPfXPsc6wUTyTVNJ7FJ7wUgoQTjglyWuL1wNLJfkZynQrH6otJ6J6iIqzKkkiX6uI5jS3Thc7Ci05NhlwpsdN20FfDr4KO9vZmVR45.BezcoyqI2P.QNLFM6ikxIX3WM3HpyZFPRp4KxKtGOrVvfhEleLwR7mAcYnzzI3UpZzLFDYL6V2GNM5KhrSBHDOJkreFw9GuIoghlTfw2rWWLGgTMdny9xWpplwIuPGfkX1o9wqiMjpYpjNj8PtGa0yIIa.XctzbDjN0N48eY.qQccDa7z1rTlXXZ.vcqFlii0ElRwh7j.bP31DimK8S3kJZ.4HctBp_Xw0tJwjlhM.TOtT9fNAksKnn1lVCR1R7VGhODBfOMMgNG6X5P3KNG7jESgq3FvMxP.DtlHRljNpAZplKRIV9RloiYTt0s5SoBkPoENvBzvilVKFT8dVG.AI_p1Aifo4iofUU.eQfLMcK26x4ieVX.RbnHN.P5tCZC9qqxo9NhFs2jmJzLF0Q53lKUmt9UcOjl3OqCL0AicRJhX96gEeU4PV8VvibtSZINA27xoQsEyg",mdrd: "dQUjOQgQuR9mZxUjc1_yIr6IQjjoM47AGfkgzdA3UpM-1739168018-1.2.1.1-D9qzkSlpeBtb_vKxkk9OCs1jdLkjJNHWbxBaur2kyg_f25WjYCD5PH0igs49hmdzLvks_48qVvALf1xSYldd6amperW.SdMUuTXR9mTo_o78_Qi1XU8IKTvDWSIrhNPrN0AgyZSJ3fIaJsFxdek._RiKu3OXttYwGGwL1NvNoKFwnAQICNJjWweuNQ2RCq7zdxslzAdgb7tCcvMHBM4irJ2C1fJZF1PkzM2GgIjQ1ad63H6YdQaSqffzX_bjvRYl9vyTLhXc8hPYGO8YozBu8wnYno5vjGZFAMp40q6gc.bbcfc4Pq3NTVAkwCcJfTS9esERvrxfyI2uUK1yyRayfEmyuwLYKvI1zmxZot6jl7R8Ue3aSJVnS0zKaBuKdGEKVGVGCxO0Zsevw1g6KrD_sdrIfBCecU4N2kKyJqo1CY0aWHfTx97b.RHxGPW24cOzxtxrVaqSoKjhwjfwHyv0gDVwXDy0Ih4ITImqBdHRQvd9eFWDt2DhOE6LBwBpmhYASGCCIVpZKSzA4cgXirteGANOTTEiONI77XNXIJkHgyIgEIxHBgUocXOYOoZZ9DctLNvVJeVCvvlG695LW9UMvx0ulmXpB8ImOFLC4Tqis_7i6f.W0lVEVNuRgeGw76CoEDdqchTUE7L497bFpprReePRK6x2lobstH3iHB4kUOkApCLdTNvRgbNuhIopjDNdcJyMliKaDGHfCiYBfYCq4teeirfNnStJFG_NOSZeVyhEhxhkLENVdFfYl4S_2P7E6YQxqh4v_YptkCrVTeAeMkxKfceHreS3maCNKpOaySnRKms3M53UK2Tu8U21tAUSVEbVLqsENXen67ewdiJsGfHh7QrreNs5tgCvk8WDgRRU0XPv7pOKloTuvJUCGcmgBtJ5lJmj0LVsWQQT73RGlCzEA.qjbXtLxPm4dYqKRdXaax40bP8B.TDJKGlp71H9MbXt_u1IMbJi0hClzbUq1hNt8_6zpKoX0Ej0T.pp0gHcCa2NuvSq4EK3qIwAr5oDTEgKKPFvZ_aoPz7i99mYcu_vAnwjXExNTV6vX98y8TECDdKYyxh6pawmWGmazE5u43jIJ7xaPYZs96scRxiIXtKs04HKM9zafC6Yhao6mugvE9fE2dNQday0Ih.ObPGJlYij_Ualx5u6KLYmAPL612GzMw0hR5fSGuwwl_kzwOj5kYg4IYezbVA8ltzG1fXPxu_dJISoKNBxDxLLKn1OSblzk4OnaMXsxVoK0GNvlWZMYQDanvqmfawRZc4EvZki.AVHOrAF1yVR_GY1z356wD84y55TELOvf_YJ3Fqp9hYFj92c7VYGlQHAWSOpgfALp8xDDy00iWGV3tBcML6Q2EkVFgKywq8Fc_ZKK_hufo6fRsl0wvs36u03yl5i3lDdt0LfkqgPF37xsCFKuZWyJJMbbVOekJVQ.Phn4OMza_aTbVeasfh2oTS5kg6K7wMuF8_aTmXwgQwaxsLJ3MFCb43tAj1GPuGb5lKiQuFCIivm05HnCjrr0xV7RIAeE7SIvaNgDPffna1ppCKN0YtgFUJj0cT3ShTRkObRgOcuR1cJ6AQWmn.vsk.tMNCt7AW5RtbUHa7VUPKrvhm47bIUzuAF9x_yhWcSiJdfO8ThcZr1DGilOHU8UWggbqGoUNzTl3rp0LgrO3DkPMSLqB4xrjB9FBA8Raa9jm2kxdh64r6j10X8jc.4YXRs5M2EHBD82SBJHfmQKQ7iPc5BoR4D5MpZnQpcDyucEJYIG6eSgVfSCRC3.E27lpPTycKhs4OxyfJLeyMMo2QA0EH_nacjD5y8b80sydkXZphCHilWjtupUwxaHUncB_UJJ8EpYD74Wep9v5fckMAGnudCQOUGpw"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=90f9f455ac0f8790';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\/0461283975?__cf_chl_rt_tk=MFU921RB4XiWu7ZDDnc.edjrL4AmNczBpjy2dUbmhWo-1739168018-1.0.1.1-j4Tdm6Oz1WKMhGwD4WtRwUhGVfVW6xzrYHOoVJPyE48" + 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