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-6581723904-gov.caltech-edu.pp.ua/post/8254917306

  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-6581723904-gov.caltech-edu.pp.ua",cType: 'managed',cRay: '9100f8e7f8d70a99',cH: 'Y.RezslMuHu.7lEMbHoj95_xgkv1Qv9sSmc8hOlwrug-1739241606-1.2.1.1-mEkVZgdUIG2FYnSMLf4mRinGdYWQKhMxmKNay9o_WOIilL0vm1HOUtbykeSC9p2x',cUPMDTk: "\/post\/8254917306?__cf_chl_tk=rztHA7Q.RVBizjjcfemc2RgZxWsH58aICLp0pQ7z0uo-1739241606-1.0.1.1-NaYCU6lw7ncZyb5A.izE5FpGrDD4mZRR_kZbLaQL81M",cFPWv: 'g',cITimeS: '1739241606',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/post\/8254917306?__cf_chl_f_tk=rztHA7Q.RVBizjjcfemc2RgZxWsH58aICLp0pQ7z0uo-1739241606-1.0.1.1-NaYCU6lw7ncZyb5A.izE5FpGrDD4mZRR_kZbLaQL81M",md: "VcgzOVftWq.164oJ_TZ3baSiU3a_Uqg0CjSxTzVotMo-1739241606-1.2.1.1-dkdCAEqdTZKX853XIitfqRz5sZWfTIoMx8NARdK18GE5EDTpkUZnaaCxqmDtpw.32SBe64CLkjkrgNq_VGF2OMJ80L3Pg8fpqJmBSivFtWdQhReJcktae7F0ga25oI0KuHV6AhSrCsgk.aHlTDhhcQGBJUydMghHVP0TRnsw3x8wHzsWEbgsycaRL71tPtvDVR_QetmmxA8tpSU1kjIlGfp5lGiLnjGUOfqbPUAUbYUnK0fTQl4tMQfMwhLofB749zYyp9z_G5vSpt0cP4DNlv7EK3yPpBk0mQmz2IYsbFtXCRgVTmukhuILgErMTs_vl6odFUrAWkAUUZKPHG79JBZa4ARcoLDHaYsejeicv0UV_Ie4k_PcwAs5CG10TWvFYK.siCS9yN81SOuo2lrTjXo.t1TZCu_ymcy8mnR5qCXUDE7uUExR.6QKVwOxSCDj8SwrwIoXO2CBV3NWbntuv.F.YRkJW_SwE6RaLPuXAa7e3rhEp_maU2j2AucFAFLQgwOG3kLic6Ru1TxH9jzN7kl4O_nuBOFi6ilhEcC6ZYJtmEVQYFYy8VwanQgr_WwZPw6ytRJyWCGX59Rcy2.an.P7daLuRbX9cchiq62I0vlcdmQVk8KBfLuX8V5tRa.WNC_scP7sWzDnRHDCljylJdgdBv1m044v_Cse.9YaAGB1RhMaH3JEwqeqOPtESrgKTU8lG79SKLYLmKrhCN4JTsvLHcvEMW5oxaGJwK33bsYK1xUghCyhU7kWHlKtIxlt.X_Wu9USY3sjI8N057v8h8nfUj2xmGTwLDBSAJteX55nZ3etUIu9cdLfxn.VcOssxx60f09psatKYeLsAltJaP_btqhzsZm2.e4InB5J78nKxxitq73MXJgMwf8LMe6vc76R1umMk242pbiiIqzpOCuKXfBDNvU8QQdwsrKfFkhu4invNbY.2aRnYo861BIgXPVMlcQ_PmpitA3wWmQyuHLj9nXgcvDZQy3WnXKNgoVzIembF32_MJXy.CQkJW.2N7yJvtfpc.KrHV9YyS3_frZup74gRghszxs8LNqPIqDnPAjug8UcKmdZNASFNa2AW3YX_1M_yq5k9_sjlwjZXcG4gYNPTzBicfCY6jHXdGd0W1DQm.bn2kFdJGPuJYPctZRfacfM1M2IuQk5qib9AJdE7orF4dWM7eD1hsEcmSQFjvmE7KbfXfQkUkDQNHr3ZgIH07IyiePO6sK0bgc2USRjiFdrWgzfYpl8Ibxb3MW2CVa.92A4v_qPKvDMvvPZ.bdrCGcZuk.GyezLn3xj4K7EzQPKSkqldDHAHDidAj3ioRtvcwGiViXS555dlL5OuRN4UcTLmiaoND2655SuYEmpXkM_d.WUc4cotd2JFUcnSvupKUidBWGzoy2JvHbpJkLcAMfG0zF5UyVm4D2lQoZC4vBsp70eUt_uPG.k6yqDV1Qq6kSlrT9eePpU.T4wcNaZHqW4FBf.F0Kp58E0xJAMzhjE9ftZ62bhmB7k9lVaquv6HLKpRJvDtZk8_DzhjCxIs4xhO_aYMNzA1htoZ5c9XnyrEZdyrbmYoaMOWw9ckd_4XtBmRRDYPSiJ35KfrcoGLlr2QNTns3fOWnrMey3Od_ugtkEcio3cO6zU3IOXoz4l5TWX2gT1HSWdVl1dBNLu0xFsgf5vMFmD7GTNgIbNnpPa.SJZHVwH.lPkH7Mh67LcgErPxDrdjTkYWzRib95EWTSLri_6EOKgwfzhE5Nw6znPnoetMUQUakNB9Dbei7UtRtTH56FNWNfa8pqhVIVsE.TF8v35JYyTEHWcJhOjeTyXa3jE9FPv4kffs4WrpEAe.e6rbxgIc1fGXQ0tVOT0p_8RD0R8DcmFo38R_MbBoniHxcjSUJW9yneAwtpBQomdUTQVp36trtWFAd2XngdHIdEZqWbhdiwwPeydAp9UsUDm537BXIHRZ_yK5DptbtTFw3ivZPHBBMi5XfDTlM3r3oPzBrBlRLH0Xl1rUFJbBiefhNcCnRz5lsfv1t7nEdx6aCCdLeFx2Fcyo6NczBdORuWVEUeFOfjxFiWCVo28.9ulYp1vWkTDJr1Y3EuRyFjtMD0O2KelH0ffZWlWySOh36VSj1OKdfnMX4s1CCX62RGpqBBKphk2GAErgI_aWwNN9w3gl.2Ql4hOs6bWhqlkR59yOqRtsu.Gzb02Ns9ssTDdLYbJNkIl88doGSSuEcD13KVcdpuhlDpclyX2_k7pUWaGaUMACDkkQbb5YA",mdrd: ".1WEAE_9ATqyHsxloF1wNTOncSBZ2PMMcS1h7oEfOQA-1739241606-1.2.1.1-5hVeU6iVtYqSRY3T85tpIuwJIA7YGPYU.mkVn98QXJZ4fKmyaT8l1gwdldSDIXvQO.fgyWJluYFmW7LQgVoAMkAjJzWwUrC.LDFUIQ5gfjMSXt_8Yog1on367qpCDQ.DFNLnN7.ez0O3yVL8Qkp8jHf8r3kPh8FMsephxz8sUQ1BNFCfpS052dZMovIoFFWEGZ2PopSgepXVYauQ1QPA4lmdLSpJqCPwx4rlFP6jV6RLSMF.BcBEzo9LO_4vvTMuUoHaGN7OFPmqzXTiUT9V5Y76AUO3B4E0Ri3qgw.ByClAtAGVvZ.9YMQ4yHZBsEHW_wn6VvJSZzMZ1QNKVAWVdtPYC3ascomB7zvTrn033YI.I9v8g2N6I.BXyaJnF_jOuQL9fogimXAfAMJlPtW8E4W4NUBJoETICcKq3QcuXJEl4DyrmVoJFK9fLmcun0te2yFsujSaH5k3gfYPdXeoxP3JUgYREEwS7bIWmhoDciA6HAd0jFgjUymVPIUyoCZHJKSylaiTTbT3Dsa1gx5f2Y_BwbZN9ILyALm1lAk1Ljpwl0tZ.d_DBOVnAHd0YIieWik0va.6atY4beigk69PvFKkQTv09TqelktIZciahjHMNH6GTr_aEuNX9SQtLHvT.6Oa63NPClFmkplx621j210XyBPN4WyczBpPXaMaQpHQXNzcHlLKvroYsC2gd5xWuj5iX0UmwKnwVmiemWjQ2f6cOB4fZ56bh4zzRr_1w3VdTDlBUbtwBlAs5m7_Dp7zHrhwzD_stWvF8Zb3nn_KWFPCGJU90DzZHthzLCq_Jpf8Wy9jKIg6Ld97.SH4BC6lqF4bDUL2lCtnizAUWYxPYW3cQxVX_.72N.jrdzqWjwr0KfupDF8EGsiulzGxi6.04kcIZXDeB4jftgP3MyVrPtoeVBHs1GqV0YABbbANQaYPz7M.cQYu42sfAV2I5fc_TrQ4D5dlOVSYCS4s5PhRqBZMiCZ29A2f3PvJBBoLkg_GqCSdRdexNsYLXb9utmKljha9AYFiKGUZtgzkad566ie0vMgPUeb2iNia6q_CmjV7v8yegKVTV6sfOGwI5Fga.CYwVt1wMIJMdcOmtWpwQEhOosiNADisF.hVtsCjhXk6Be5wKukwYoERje4DeNBgXicqBvjH5ZHNj343YZnQ51x3ZEtFaYot1hRVQ1Mnn7gJKduvsptNuS54dwvYe18fjlJiuZh1Qo21T9poK6cEftK9renuccP0YU9Rcbvih_dbEhhgtw37O9F9GNmZ1fiYUTZNEqtDeoqwZ1.apwdJJAcqweo63PVztSWn31USnWGOKiBbBASkb7LfR9Umw3HNSYnZVnEWz5yI87wnBqfzRG_lw6ldO3s7wU5KWgfWoLmYQbcQ.kHWGwR5utKNrITFsM3cPOrr2QJk2Jf400hIlrYZ5hXn9ND.5ohY2aLaWb_V4hEAQmW3.rijC5EYXUTwBXC9ZmIvyJVb.nF5gB1KVjGEM3gU4kEjg9LIUlYAYeZkEWn2W7jJm5upD_mm8EPNlxGhp4ageyY_CzKlVZ4xt1QC5yzaM5EyRfjGxyGDHvCuamDBZTQZrC7jfWD0aA9EjnfQrEEMIlPc0ug5obhyFcdjKGiuxCme1WbQePXArofSw.DH96NHRqABLjJ8EOiECmDBzmn6n9x4BZT.TgrNkoaX7g3gji2KPbpnifAVvHh.uCkh3NNfWVd1LR.8CK9kjtseVdiu6014B_VqvZ9LuipR0xmlnmQDWRtnsyDQzkQNrVEE4PxWHk3j7jxAqRJ2tQhwFsuq_W_nC8qYx47jn40HXCOKHzaztTDO.TxAjvxfRiiHAzHUreDkbDyzr7jA"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=9100f8e7f8d70a99';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\/8254917306?__cf_chl_rt_tk=rztHA7Q.RVBizjjcfemc2RgZxWsH58aICLp0pQ7z0uo-1739241606-1.0.1.1-NaYCU6lw7ncZyb5A.izE5FpGrDD4mZRR_kZbLaQL81M" + 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