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-8097261354-gov.caltech-edu.pp.ua/post/8097261354

  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-8097261354-gov.caltech-edu.pp.ua",cType: 'managed',cRay: '910136cb3badfef5',cH: 'QObkYmwM5jsLNxUCbXjCN7foFcgzzh1hBtYXQaa5lRs-1739244141-1.2.1.1-q5HbKcJtEj0DW4T_DiwSVPEsalxu58WBrLYeYm4zHGd1ubUA9WgjIsSZiIyTir6N',cUPMDTk: "\/post\/8097261354?__cf_chl_tk=X3ltzsDDHUEKsL03w6zi005dMzhMwLOpotBFEqViOOw-1739244141-1.0.1.1-HjCUembHscm_Na1qVcJfv7ac7QmT2nR_2wuf.dLLfaA",cFPWv: 'g',cITimeS: '1739244141',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/post\/8097261354?__cf_chl_f_tk=X3ltzsDDHUEKsL03w6zi005dMzhMwLOpotBFEqViOOw-1739244141-1.0.1.1-HjCUembHscm_Na1qVcJfv7ac7QmT2nR_2wuf.dLLfaA",md: "gavpZu.orCRV9MvNXS6cNE1u9921iVnJ8HIlsqu_mHc-1739244141-1.2.1.1-gzagM80OlQpV0NJrVN.BietxLVJK6GcqvccyahEczpcX5fHM21keA0aujYF6mMj8j9UKe87XDt4WmQ4y9BclCr_MtARidhI7YYFw0S42UUqqBT0aZ3qDRYzCF9w2eofUZA0HArsKgYhm7MRmm4.GIEIxVmetTcBvktAPp5NVEKbT3afJDFwFKGAIS7KpURRi3fxJIj6lKavzGg6QrzhShFkMvNt1alVHZsUA8qqR_R2.0Roul19VzgiWKFPRQQwsoa_Qqr9Kw4ydN8wNNrMvmtfqhtSuGmTzQHVFw9xlzp6Q0znSTPNvfYucorH0AdK7Hmkjbo7TdLKaUsMygYzO3e3qERY50L8vIzE_8d3iZO1ISPhogHY3GljiLCy9ABQA39M_fisapCp_XqG64D3jZvYS6AXuIIrBbHvIt7S4APleFG17gPj2WQjxzsyq0xPvTNJNY5AtYqLoiYyp25GTyjfX9yOQFMnFM__M6UGyi20gMVdrrCXtWf5d4xLZdqW_AxO_Z05VUT1AULK8Y55ZPzGO6B3oObQVxAnV.kpaRVJVbD9LZ5xpbBUWMukKUsXd1nHUfZDBB57gt0fxIkXOagimDnoAHAZkBgWirOR3sQv.60qBiuEId5XSfoy4jhqq1vAOd9ZUSfcLL9dfyDebeAS7C8DAe01ghiCDW6ZnQZlboKSKBckNlAF6O16ATRAnAtqmubPu2JHqMLVrWyoAiff5Ba6QcA2HE160MFayvXa98Is7IhH0X8y6.DN8PfLGkmdj1nfs8IgpUqx9sa7NJnbm3ibtW5FbSu2zhQ0oV.Cma7AKEiiUYUFpPMDj_tHSV8O_HBN4ztPY8haihIGyX5krV46PyliTkG738V64CSsrGBOuEqn7lj58NxvebyHgPtzWAKhrGU2vrIyXbua__H.C8oezAORNOgDNMUS9T0aab._f2VmStGV6o4.7WQrW4U9pqabnWNdJwgLJU4698j2.Goy8WWJn8mTFfnQz8JEvMchQIzbduZOAmcj47IrvOZ1r4UHyJDmgG2wpxZPguCr3G8vFilpcIUiIefztSjJM_ZMjljAOYWTtK03jBDeZTQjT4fojbOKiEEhxyfEoikRDLRXgecuNU.6quSzZib.w2rMRxhDQltYqoI7ibGjiKs1RCPD0I_H7SfRgTGygc1jy9RghjAspPMXnpldF__Tb6j4mWB8s1yMoqjsrmiY3uTj96K0HgOttsgAjDYf0FSlyfdQq68bkJcyPKic94dZkziGhgMFYm2f4phImtghERbx0s0DTtW7FHcdP_t7caa34hOtdTgJWfDDY.PJEJbz1eLqPsm1WADO5.lgoTLSNQhAMtaMrD5T8lXQlFbp1Unh9_D4sSF2.LVVdp9dRuNILukkK19EkSeWwSFlsHuXKvRSAyE3.CYSFgxh4oMm_BrbxBap.hoJE0DGGQtNkKSED3Sua5N.ES18mFwrnsAe71vSueWx0udI.fZc9S8F_EpBFJIpTm.cTgoeQt_5RTy_JuCc3WFj0NzX4R5zJj4F48EfR7JC9MclkQUkYOULn9AY5niTUo5RzDYCYFINWzbkXl9H.7Kcr3sl7M.d0sTAAZWg4b8s9Y77cHbj3lJB7MHVidjjtRiexiR28am6IM_XToA1XQFldETf3_xQV1.npu4D3izvp3zX6PGWAWznwhngvumouj2vDxennDpJNlAOt09RI7yeg9XO83uEaReEHPK.bgxVDq4.qvVvyo8ahgDYu.JM.0y3M1zF_zRPP1B_YWV8vQ0NZPNenxDLADf4LyJqi7IZN9uP.OYNgv3KsrttgTwCW20KAo6yKHcg1nCUEHkDU0pWDnrpoun0db6nOw8aCIDkckKGI_3S10xMjjZ2ATTVcL.PDyTkpYD.M0NO5VtI8WVCGIlyyiwh_nT9.CSx5zAy_vHGpLdfRx9vkFBd2Z3ZvD.HvH38X6IQ3MGgkq1iWMoO8XMuPQSpIJlWi.IzepHgVaEYhM.L4JverCOaeneKdlQueCHEvVwPVU5SVmt9xwTzV35bswLiBFNpLnF1XeZ9B5sGurD4GQR.L0u0QV3Bi35xWC_YtrmQZqZ84R6NyVZ2HEUbq6kJdnBktBpkfH47TRA.mtJgrSnXJx4ogPWpFC1c_1k5w_1Tkjxmqqv7EboID8ffNrVT_il4UuS0yrhi1aQjisMcXRSB3ntnkB50d_pfzHy4d_8qQMaaryklgLjpIj8qz8JZwl1W0q4J5WECDMbdxJu5KJPewQA",mdrd: "lV.MKZZ9.vlVbrDdtr0YI7D6_BhX2h8sJjFsv31WE6A-1739244141-1.2.1.1-PTWdNBXggVDUH_kKoQ4TPpaTGkanvOcscPjDkYeLRHSyAcOcNE2UdNcN9ab8IqLLueZGj0Fe0MIhtn3P5q1X9u1W9yzflDFTH5AGMNdEpxyI6r6YjYqne3NzJ4uefh3IzOkepy1ZlGnlCXQjZCGKP.nYM4CZlP9H24a8ZVVj4MM2iX5uu.3jzWJVyCGSPQMlIjAoUtdrWWkkT9m_azK.AVEU7w0AZjXyJbdEIcomfLnCPSxow4YuKPzq.V4n7pjemmY3C5ty2PXyi1wvfpJ3a75w1YHyieRxeHV5Sip1rLxynBUs6z1S3.u3ZCNi8N.z.qTUS0L_lIUXpQ3YLxABMSm8z.OWdqdaJlJGpM9rOY.xcLwpKS_lBAHkjOxly4TbJ9pXbwtm0OTIde96r0cL0bs3P724VbTcvFazaDgZlbtdTK4sF.CTf3Y78ezgVry3MYf4LotcUrhIV4ACmPLMMCWVIozQXc6lkVnIEBcyfzSTkztvUfje0knB6la3RZDKVQRjLykhGdMfdJzJRbQFuLqQRpzxGEAqd9G6kuRpG7qyrceqCXdVY6I2oqsjyAzj46iJrDiNJS8x5Fn3IzNp.R_AUlscSgKt1D9zjBLL1.l3s_S7pL.wj2O8zigY4Kwmfu8KhmL9RlueicFCsJhhknCis5rNH349Hq96QBs9jYfc9vnVgjocbU8dyx5QwLCGw0XTXGRXjnYr5yh6BM_wpcxKONpEXV1.ZtRrMu7_PoOgk0h1ZmahS6DPGX_IAzTHdkrZmCGI0DpV34NdiCh8wwGkn0zvie5TrJCn2MEjvbGeN62pJ69sKBwvJSX7UQjTQ.NKBsC60f8l3cQ4bfFS7OiE3AZ7geuAKZQ63kqU2oWuG7HYcwtADOdTg.7QJgzF9ZOcNn8ngwUvsHWHab5BZFNlQ_V8l7b3bKFODt3962VFPvF8TDwtUzp3DANAi7pOMeiMXk.4_6Hgug.wny.NC8CR6.JlANNDMOIRiJwiCGjZYoEkjMK0JYzqGrX3ZWs35vhoz6KHqvCmgD0xunKlQQC0E_aIpgbNJ0l2VMvc91V8XTzC99Q.sFTOEJIT09oHlSR1fecR2TlCdqvT.75MqTbu6YjssP2FRwEXsGwYyzDB3YjZwXuQ5sL_2EXz_JULy8T2Tv5PwWK.mp3rV._gE5rWlrW_HcHZxA59TyBv_3lvn7GLThpNOWxeN_Zpay.zFtzt4EfVTyYCVPlN4D71WPqVlP7dhjpj5jIpeekxly4XbK9EluTMCz34C4MVnbTNPVplT2aHiaft9RwHTAg5c8yHmfpZO31vj80JgQAl9AhlMnBrnf4BQH1OipLWYoulTj4obhy6rRCpfFSNkehsZaR2OcRn7YLLVM0d9YB5TtaysHHsj2y0BT8kr_nB6vQN0ObOoRCTsb3Q9YYTv_XcXHBJkTyM4aUIjxhKd8by11gxxT3MnpVOfn_GQarIDqHnTOw86pmSvlm6AeO_0WUJtgR7gqWzCkNNW5oBPORX6t4iu2iCcyRJY5N3AV8lA0VuCgNegSE8RESkb.M3Tl4c73ySJuEZWqIKmZoWSArEwfBSBGxr3nL9F04C0J7GEalXPHkI3ReX.IKtYin9fcBmqP1CLzcpGI0zzMbCpkxSPL6GtLyCPO6gtMheVMx5N8kpqqfLH4Hg9rRe0Z9p63zydmFkrL8v8ruM_VLBI39pK_yCm.TwRt_McmFuO18FfcyNRb.ae.Z5xj.ETqrLKkar1FHjb2YfRBwfQksmhmc8gjNqnNXaKpDH.4VCdl1UqrS7hqQ4.XpOJLltpyqSikpZ.ojD.Lvh6usOyfwezAQnJsM5hapXNagYlqH8Catppuwy"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=910136cb3badfef5';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\/8097261354?__cf_chl_rt_tk=X3ltzsDDHUEKsL03w6zi005dMzhMwLOpotBFEqViOOw-1739244141-1.0.1.1-HjCUembHscm_Na1qVcJfv7ac7QmT2nR_2wuf.dLLfaA" + 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