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-3976104582-gov.caltech-edu.pp.ua/post/8503471629

  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-3976104582-gov.caltech-edu.pp.ua",cType: 'managed',cRay: '9100d04289ba20ac',cH: 'HF3uzG5GxY688q93EO8.XJDFu..I3WPW0Sm3Tz68Gvw-1739239941-1.2.1.1-p8p_L3C.mqUV9NIoE.8E2LHLGoehxCP_7yEb.lRBOES5G4EiobI88w1S_faIvfR5',cUPMDTk: "\/post\/8503471629?__cf_chl_tk=jIo2WDVllObzlYtC_nEyFpUYL0X79d7SwBhjqtaraI8-1739239941-1.0.1.1-PCUQtqxlDnN9Z1QQnGKd8ysjS2YExhehqNc9xNGBmEc",cFPWv: 'g',cITimeS: '1739239941',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/post\/8503471629?__cf_chl_f_tk=jIo2WDVllObzlYtC_nEyFpUYL0X79d7SwBhjqtaraI8-1739239941-1.0.1.1-PCUQtqxlDnN9Z1QQnGKd8ysjS2YExhehqNc9xNGBmEc",md: "a6T6Q5XuvfpeVjrAr1pJeIMZEKd6iqGXzokNzrsi87o-1739239941-1.2.1.1-Ggr5_VTEABh3GBsOz_i2TbN1fLSmGyDqaPq.p6yVdeNOJYTQXxyZEi586S5FSEbBUeQo.HPONi0N1UJGUNiS8zCPxwVIWNatr2uHda6KIHpRjW52POkim4ycAhLX56nGfNM5MnHMwZYbQS1GxW84uZrzOI3uMxY69X6WeohyMNznD1EukPAzNnDNcu7CLNoTK.8hJdNe0PFYZr0iDCSp6Xz3Fym3NO9HLiKBxVH4320vDzGDXjx3zRP2LWqFvsv5ndTcdXdY7GjbMdK3E4hTiNLJSmclT8LObJQ1zjTOFPzqED5WJzWAeuiTS8oJybaWQZUoQHBNy5oXfpaPsFHWamG8eqZly6PzfjIsxm.x23il2w9CfFiE.mnjaaouaYMgmbwqgw0lfyWgHRqhhhLFCGl7dg8MuYDQTde2exPhdpeK.Tu755IUyBs8NoW4DbUc_dhEsdyePaLUmO6NTFfyw_Zzv.OVoN5eaNzdMJw.yKK85bfNqcCuhMSomduODaC.fPzgRjWl8b5CeVeCY5pDILhVrjR0r7xcTgd.tmgTwaUynroMPNLmqw7P4mnhRsEfWGu7p.hagiIR9vUptGfvy2__rJcqfPe1IyeRkfnDKNUA1SVq.L3bXmBOsCPvUYHw9d_X7Y0nyn9wxKI8MVNSmv7spuKrzSBzAJTq02aeFVkIV9oYrkWBWhbV9tfuMY1AndKZImZ676xexWVEZm5GvOE0dHvM.rXcDVfMRwtbl1aDkQId850CeYREnhqaDHPqUg5.VKbsHyCJZeRij6HxrIPGYHD284e0xAPHjSc5kX1rW8ae3fPn421v3m.0oW.9Gv7vDQ9RYMBZ9uCBe92WdA.c3s7Cags_dPzoQR7kn4B1R4c.JLPT5eCnkVkD_60anSmm0da0spl1JiRh8712S.POsh8UV9929wGCWs9nU7FmBhTvZr09HsUpkPhRTEdrn7KzRwFi82BKYMrZaVgjn5sf9BxvrXrHOPTUaTvy..nZzcE119DC495f7kI2Wb_qFt4H_nEGx5sKmTdI7UcxiBIiyiLRPf4EzaLiigF79WeJZdvfERG1_j034NMXxs5eOB8atQsAm.seqsjO_eHt9LfNrAV.bECIvfjZlxhMiw4tbulmDtKJwKVONWvP7Qa4ypEaYlZITgqGLDmc6YCJSR2bKnMnKsW8Hr2CoduC4oMKu70NLGJlFAhZy1g.E0Y6BhrhxGY_i2_L_Ry.f6Kk8l8lrv.1UL8LrlqGn5C8qO.Lww0neeeDcPTs6lwW69ZdKMl8qwstFSx7xAHK7rM8C8jUEgTJpiubxWo05pKOV81VrQIvcADGJf382Vzr_a.65moNnBiJgUhyzoa5FxMIFGgysxFKrRal66AyoTr33quzT2eaEcZYqNkZ4VqunEmj3rLCX.fVA.0a4vPO9kaZ1b0xuSLLNti.FNaf1m6zX9OxLh6R8ADQgAymXhCRajyTuoxY8SPAUYfV8QlnOC_j2FBkxMiFuGSibi3Z6XrgqO9YCKL7vF_9Zb17TZLEYDpVHhS4oDSJTpaz1ok_ZS5CFh0WZpjJxIVLkBkGG4U5k8Oe1FwPRpoG.d124ZjBZo2uO_.Eah8hcQehLBcKlXd.lqpgo.DDjKM3Ll.3IFA771vsbmHT6aX25Ga_DxekPwpBdXpmdWb3OCMjEMBiz4OdkyXW7aaU06pnbncpQYTQctu_obBrPJm_zHvNPmphTJ8.Lsfi5TWuch9zZDzEZ1tEJNLidnS6fN6DJDxdLa_qEuo1kshnMV_SyVFd2mn1zd7XPOCUs0G0c.pVdRBsj6yaKk_AsbcGH35NncmZ1chOWTUF.i3y1wmOgXHClB08fvmQs3c28YC77H5..vAj5.pJp6fUsdkbx5_.fUeh2t15puupVyZwBDEWow8awSu4IvPz14z01D.7EjQjXVq7OSZnr1Lg71EcGRPUImFPEjRa8FO4_5qnuWZkGv9rwEjSOewtY_aVBojiP8Je2GyXiAb2bP6LUUBgO_9D_TSib_VrGHIn8FTGlFwyAyjAFSq_m03weemX2phLDm_SoljF1nel4MSXhyoT0hPBPFTRr5bCmYBCqiqVVUkFOBxZ8lIMIK4b12yDKCqQKjb_O1cPPURig0EcjZYsrTaY.Np1dKQyrNLsPofU0HXFZw05tyeZUxaf1q7ytG.5_Gem4fStVuCEIARMD9Adoj5zsEqX__YeRp6HM3AD5tzjLYw_C6iw8hv8scFt1ar2MaXTICRjzmDv2Q",mdrd: "yRrnmQIXyratJBA.pfAENRMurLtGk97TIcr9cDu5CRc-1739239941-1.2.1.1-cUGmUy1Ht4WA6pfFeNNQmtIJrBuvVZMvaikYIw6xUzWlktC_y2Hj8AO70W_6xtqYqz3_.LAHfQuPoms7rO54VIFB0FoiRc9gWQyS6r0Nk8cV_xyFqiS_4.iXygmON2kCz.3nwshJ6Dwpw4DdflxH7oxTIpXu53z.5McGlj15049BSfaqSzu2QbGV.z5wI2TOHxjHlq1U76WnxYNho4E7WOA47i0ozQcKotmfVUOMt59HwYmd.6IY6xsXJRUo55Ygwia3k3KnPqMQMw1ZQUscCUhxjks69fClgK.KdIugxxVEBrjRZE.ACSuWOp998nVuAfHLur_Tu2PPt5bzlREujuVCSJ2hu_DnSp4lStzuOvT4gF48XvXiaP0eWpzP.gOWMyQE7dtQYOWsDhA82xr1cCThLVdeVYCttQrIj_L1sMLnlNsKFj_uerQO5l1AZjTXPIJdC5XEXg5cv0J3tKEj1ur7Wpevc99oEBoxpCifvu8A4Bj3DoPrkjKjYJjaS_U1I9tpMpcZOVwznfIyz_dr7CNkGxt_CQrRDXbJiJjvB5cbo2y5v5XGZzzDTziqAkKca5wRY3CW9JY6dNS7U811_f9fuNRddMFJxvWQjFDPBO4_maNWa_P9jbMrI5U8tzpkL36JeOcahqMamze3bcr1mO.pHuxc9NBExntgRY3u.UtsrGuo5MQVmCqSvhEzO4p12jprXrH_DY7svWW7NHnzjFPsc4szXHMSZogpe8cgkt5bbruCvbNieSXEaaFwy.SQLqIzp6bTcz1HkBTiF840GIa1xjU960p1LZJtKRaqnyrC2jkU8qpRdaL7andyQYr.AamcgT9Y_HfW7Sbi1WOd7eBLBaldp8diJCVkmBT5ml_ZMdoOe1HlFcbyPYtLVh3UHyhcqHFVVGSzWZEz3WaVy.jzchWfEB08tjQCr0._5MSv_i5xEA8oUYUgGi9dPyturEz4_tsj.g_C0tui3OnpTLsNJY97SF8rhnhjuieFTkCxp2gBjIb7rtVjt6wMfNWmw2aGIZv5ZZ2iouUbMekzBRaKTgYzDNB3ORcCtLaxa4CzQiYek7kKCsZJklPtXGp6el7gSWGCDfsXbLKcs5Gta4MJMWf8tf1M4yue60i1Vc3niuXeC7_a3H5eVw7ZaoBD99XZLcdlHXrZVsbkb.xAauJu5VsAaWExzMm3ymqou6izpLyZ5v9Ii6WPjXP_GrxHBEwSC.P9SKNR2N4u4VVlzFrj4V1U.f_JvpXyasJBJZ4ZUewnsBV4bhFGyQmP5dyAIhpW1gEwMrSGNiQUYWTwsoh8EA5hvMYHB9jdAGleDoxi6FoUmAV1H8ALZAqe4wFjbVQo2xx1q2FpatfLcsPei7KSXsLBNAwsg.4Mss2sdSmr.5g9VCNfkrqMEJqetBRznGC.BHTuz_fGYkkJXVPYXkMH6kWvydY9BVIBKozYQ3PdIzJbVQ5Fllhk_ra0G1pqztqkATZgSF4bC7pDj.bdMFQqRDySAhcZ2waARvklNn17QwODW_G1hm7i.eSxdps8BE6e2uGbGamdkHWwUNo.eIIajveh5t8kSf.r7zIKCfUsQT_D2cJrFkLgBTXP6LliZjArkTxb6UX0F5f0g6BRoyzpVq3JJtihac55yyGyVmb83SFC6XDfYbGRyWCva3zOLbwm_4T0iSkgYgHIMyk2JUUqoA7vWhSu63EahcU29pTPttNyFoOGZbcDWucKeNVOc.qqAQZSDY0duiYKWwmLpA7ljY0mKVmLvfKIr5X1gu.C_bRWtIhco6zt_ugNCgwenUG_weV.Ccig6No1FsY_pmoMmfyHauuen4Yz68NAjiHCIabu.FOjKaOfN32RkxPVaPkwcoeG4bp86joSmlfGNg"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=9100d04289ba20ac';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\/8503471629?__cf_chl_rt_tk=jIo2WDVllObzlYtC_nEyFpUYL0X79d7SwBhjqtaraI8-1739239941-1.0.1.1-PCUQtqxlDnN9Z1QQnGKd8ysjS2YExhehqNc9xNGBmEc" + 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