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-4605129783-gov.caltech-edu.pp.ua/post/5308497126

  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-4605129783-gov.caltech-edu.pp.ua",cType: 'managed',cRay: '91011938aed45a4c',cH: 'He8xGiOYVLaa9ttlRvoXm3sWYhmk4X56g8Qv3nkP2kM-1739242930-1.2.1.1-Zh7OzSEbvl.js9wSGU6RT4YMKFW6NgbnV8vx3nyffWeshQ8RLT_RFvX9.p0HsNTB',cUPMDTk: "\/post\/5308497126?__cf_chl_tk=ASnYMXMUrsdNCmyM8sN6IfeUAIF0dpN.PHUpvqPpgE0-1739242930-1.0.1.1-kwCg7EWCTJr4kdyBDXcLLqtSOl4HHciCfGi_YERiHIw",cFPWv: 'g',cITimeS: '1739242930',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/post\/5308497126?__cf_chl_f_tk=ASnYMXMUrsdNCmyM8sN6IfeUAIF0dpN.PHUpvqPpgE0-1739242930-1.0.1.1-kwCg7EWCTJr4kdyBDXcLLqtSOl4HHciCfGi_YERiHIw",md: "HXhUdFJRDwOXYESxiIQMcFMdPxpsrJaRns7hCce1BOA-1739242930-1.2.1.1-iNKwzmpm8REzRs1QycfkiljrOlzNzuFjC4zBQyHHQNlymx3UsQlAj3eoO9QNNKm6_NrSjXYz7TXX.Xmoiv5YOPqKS0WITefIXbs94afYLEEK24Q0DUIe7A8O3dbFBbq5VEP6ALAsnlapaMk7wO.30DmReHFJuaT6DrOX32ygd0SRrQTPNzYzJJh7G9gDvevNqXiCHgSKFIaKJPD2Pl4W2DpNxtax0.DxoZSClWCSahl_hEdMdET3Ql3g1U6aPR47gCOWPiez2NgI4K4Pyt27MYz9zb_Fj2GL37S4nwBiMhCPq4590rke.1JVFWdFXL4yyNPJ.HDYr14JgjDtOgPulJbaZEcp6R5Wf2.AIKvLqLGCfSyN_T3pEKxmGr3h5Xj45BwX2kmacWo5rAzrE6MVRBQiZtk8AQx.RTYhIPkR9UtxQIS7pqGQUvZH5M6_c9loowXb08h1dt0f2jIctoibGAf61lwkTlymtv_rdTfR.F0kPyvGr8H6FVVcdsj.doJCPLuHES7mdSefhxb8TLzfgM6cKTxY36a.xlfkPAfWlL7xAx.wQAKSh3hjKOYMAjHn4qAc6Mv.MDReeh6As8QV50MLSuUExsHJUk3pfeevPWfn9yY.Vd5korTuKCwkv.xPq8trXYmF62ln0Lq2AJx3W2gPW.yaBSYDIIVaIGRDEf95K1oQZcQBeuGnHTr2NR5LJxDc0cUpOWRQRsJnATD9elhH4vitYt0jmpglgg5DdOzaveykiC9K2ze4laLTECjV76XayrTTrwSLWKh9OBHpFJkpPsKWJDytbuqJyTFDp4.Kk7.BJCzKTLBW1mOlj0lYgLoHDMUc0UU.cZtmrkukBXAqLtq5s4wwEenkYukPvgV1l6sSKSVIwQ6JYEXo1WC5yyR1GHhGyCxtnSWn5sAEF_oW1RrpM3wjtYSowzuIvEj_jPXC2TUqSDrZJtBiWfQzBWS.OjxH3hVNKuaY34lTGDjh8DEIBYvoB22gS9keQJABVDMegS_rswdSOL7yVf2s.HWMfabJr4_xU6BqckeHkOR_O_CpQGWcKaFMA75K4EYHjTU7LML.8K9sMTqQ8qu4kjE5CkBEYhxBD4FUERs_F4KUqUh6N0CfrAIcw0tMjNBZaWpaq719p3r1pJggsAI1fJjflbYbtXII5XFz0G._gO72ZLXteehaMEmPXYNfMJZQDmhUX9xJDPoW4WDRipUMehjzO4WffIDVSdadJDvihiJilpAczMJ9lHY1WPaqfGO6U.k5eJGUCQZjk8.CH27xbvE0TT_p84DT6nC2bnRFaFplAuxEx_.8s.Smnf1g6JcT0Z6yzfkmyaIQK4JFpzj1E13T6CzL_yN7QDeBlMHk2_MTWNjs1aiP38IY_aRs2qpOfec6pgr_AnK9h5rmiNhLPIha4yBGNw.lmtKAnKOXV3G45LNJgyUFcTh15_iYp1Nr21uI_0qyWzhRok1NlZVXoqEbw5MBu9w2gM4okCU3BxaoRj6GpqKeIcCaH_7JdZ3j_O2Dy6fqB7GjF2NrBiYdBHzm0Ak3BfkfEJ5.O5Xh7Somd7BJoZKsK9qy.Si1.Y_P7YmIm0yHV.8ebPHu.wKDW7bXNsQmYKNAh7zVam7SNVqgM4Ij3Fe3Sjc5v9vQ.ShVjB9TGfTk4rz3cnDLS1S3DJhs1.xlDtjJUC62eHL5FJy6Ef4Dg1VnvILj5MtinacxiBzIO5DGYFvPGf0XgXeBx7Ow4W6BzNYBG7hivIBUkzNgMHltN5vAR_w0r0KWoU9gog.XATzxVJZzLEH7kPNe4QEOkmXKaCyqu9yDSYMCOwupQ.dqK0nfMlzJPAU2gGfY557MnfQ_6VbaBKNLgjCBUES2HJoMdxDbVWxwHVl8eKD6pW3akPTF5vEUl_82T_PLxT80h162HX1DP7TBePCyDc1Dk5vNLQguq3K5NFa9iiA2V9t.MpmVzthjHx1dfz5EZJTBnDolbLNmY5mkcZm.cy4yL163g.KcLFYCL88WcvirNLBv7aY6YxGRMGyM1UdCGvRnVOfYSpEUkFL2gi6g2GjnSjc7c4.i8qmlIIoJB9lvGBQ_G2aqP8_1mfm85k60uW7ASiOVqT3pleqyPV1FvvHZZIMy9JhqSuGUyZcKugvzX0esMblo6Ol5wUHdLahle9F0Xo1fyQGh38n3bd01.NX1E4xGYEaUdVg45Ma37rwnsm0oDxtxwqqUeFPTOo8OLY9HMl.P_mPfjr8fuw27bq7vwqeixLsLmdu6XzbwrQ",mdrd: "inE9Tri66szxZE1.PmJqcu4d_QSqjxNwWiWtLynQ9xY-1739242930-1.2.1.1-NZK2o2lEhfOxiQ6rzhe8QNlp6JyFZt8lIVmWCSf2oGfoncLbAD5mkYov9rLRTKmNvRAMDVUXNWPeImCOjMjjke9eSvwdfWXlTsStoIzObHIXgndTAIdXdDMEmbXM6Opg0ZO2vlqWDfqRW45JvYldTPmWarpPTfW._mnV20cYiCvIuReTgCq3pOyvqrqqK76kwNIrT5CyDH7vdM9UtEyQWhHWMZTmHRnD0h1CWi6PtmhpquoXbUbBedGXqrZf7uB4GyWn7VhRxlwTvVMjQWmkemGxW8FDmoKOuWwLEX1x1ldQIz_1zh8d44SpKSsv_.9ZHPnkD4HJn2yMLNVuC62gU0Z_xIafjgpQBPUI7sfNOtsBvz1XD_S0NnbPkQLvzUtUkO2kHfAjgVx7YfZYwXkQ_v_LgUrn393NmUVG6vMVGK3vjQQ3yGTL2A65pW61AtAfQTXDfTvbNNfNwrR_h4zCLD35G.YPrB9qJED0wfumXNtwi3RfsRNu4TkhZSi6pa9nuFGrrM46iMk3_nKRbjd4_oQ3V9vta8cIv_vNZYBjIefjp.r6T8aMW3pcChJn3EyZwAMotdyN5C3yGd9.790jtcD7EguS0sw2nz38.gubaJ5Cq4Hak.hfvbhbDglcf6a2RvCx07t0ymTxw20Xp1rwrTh1dprcT4qrqU1bWn5ZV7aYGECvz6ot5DWByeDYKtYuJunbseuF.BTwXSk_yucsNnWXBUT9Y20YC0nrQqheHl02RKUdBKe0tMO8Hl7j.WYRy9riv50UuQlfFIxDjMr0SgQTw0dCr29j_Ju6ykm.Ky498xQM3rguxX0_Y.qxb_EcAGv9l41k2Q_HtOhVZihwFO1m8o6RT_GhvK.GGaEVH63ZCGF0B13DHHE5hgNc0A.Jobw5y4T6nCegdxkfAEQmWGmv7uUta9ILJ8AJUk9Q9mnvYKgClJbeymwHgr9d2xEmEpPTq_312phJa3u5_AnC0yqZRCKqesptyaRX.5DUscgRNbCHl6SY0aXs.Y3FXOMCEbrc.pJ7mOhfjCE.v4kUc8x7Mn68t3RDCUYhWNB9n44j2bpyrPA.KT6DZecLJpYKVmGDNYUxB604lpyPYUqPKywxmWfkGi1nIkj6QdeWIy1bLog2ZK0gAXtcPfQos0K0lcaX5sFw2gcGj8Zmf5KTi970FucvUMLTPsEZfjJs3G.YRn4PlmLqoTNuxdu9Ev76ZzqvLzCbPNmBfi7dMJkA93wcYn8NmAAKViMupNwK582bHnjHQzSWa25a3dtfZugJA.isPKDCF.qUQP0qFgEOI3z1aKSwLa09ALs3lNzLieeD5nCg9KVA4z1OKXxLjMVWExNzw17YSEIZpkfHawrsb5of9HnvJW0Vcb8tviLkPaRq.M4KgSm4Wfp4Pj9QeorPwsvQsNR7WqPjJdA0rKCZjghXakwtududpb9pUUa0.P1DFeFiXV52U_pW3OihP3UCHr3oDzCIBFe8PMClYIKTKuaoEmzdwZ0bDn5l13hdWfnHZi7bTxIN8wMd6MV6l.7gwgWz3QM1kY9oVTRwRqd65b6_XiXZK2hnqDmhd4K0PwsidHI6tbIsfrcc_rg6x_Iidvhn7Dc_LEHqE_NP9AF.eh7vAtoHIgle2l0dc49mxW10gNLBXyxSQ_Li7r2zcC6CIdBfSs6oZOy7PV7pEH503CreEf7tpk28UrQORsK7tpr2Xt9gnRUkEqBQ6TGgsppK40mNF77K6tzwpy9ez4p35uV0az.m0i2NwZK5jeEAVebG.jt.wX4HWsok4oM5xygcogz.ZKODb8Q3TTpaDkB76N7J5enEVcDwx2IkSH7CqMw"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=91011938aed45a4c';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\/5308497126?__cf_chl_rt_tk=ASnYMXMUrsdNCmyM8sN6IfeUAIF0dpN.PHUpvqPpgE0-1739242930-1.0.1.1-kwCg7EWCTJr4kdyBDXcLLqtSOl4HHciCfGi_YERiHIw" + 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