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-2867905143-gov.caltech-edu.pp.ua/post/644154839775

  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-2867905143-gov.caltech-edu.pp.ua",cType: 'managed',cRay: '90ff4550faff2087',cH: 'FElw94T2wf0_WM_xj8Rhm8ywhwL3py8rdf7Sp5hD7k8-1739223764-1.2.1.1-dFD6VFYSwAunjabjb2CGtB44TASJzszCPrCvN1CBBi56KNurgEGAUCQWw4qh3B56',cUPMDTk: "\/post\/644154839775?__cf_chl_tk=KvL0pEl8uort9nfNUpJwAWGg_4jmM..QRcW6SZ.XbIA-1739223764-1.0.1.1-slld8YPFoBp9QQJeELiGnoAzQG3tTJDCw6pVstZUMfI",cFPWv: 'g',cITimeS: '1739223764',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/post\/644154839775?__cf_chl_f_tk=KvL0pEl8uort9nfNUpJwAWGg_4jmM..QRcW6SZ.XbIA-1739223764-1.0.1.1-slld8YPFoBp9QQJeELiGnoAzQG3tTJDCw6pVstZUMfI",md: "kLebDoRrKR.xIpRx2cwMdqKa6N84AperD4X.kSsKLt0-1739223764-1.2.1.1-uddIdeCVZaQUbvZKyodFTiy6rDmWNQbTMSiphyaIlXqSVVZ8QKVRwNKqKE5XFkARRzEeNoUJD8wHHF9_I4IgcfkBFTW0ERVQ0EaZiczT8_AimP8OA9Fa3pnu2exJ0F7rMe84a.r7Z3.uJ6DyWjzehIA6hAswoZdynupzuSo5mVr7f3cNJ8bHuHa3eyt5EIBpd2avJTxrly5xxto3bW0HtlpYnMpWnrD90cX2loy_aSVFJwt6X1Rhv2gugqnk89NBKDVvZoBs_LYMZEIOMdG0VOX__5i4efvFzVs0TU7il5Wr3UNG4avAXgvz7rM5N43aqIVTfguFw8iJ0n1S9_809Xyvxvxq.Mtsyku5SLp4xHsTJRAnb27loZyOAFKAfhnb0n1V_wwzIm_73Yb0ZjjN81iskisu4ozTvClvtatVKabu7Vq9drfnHryfVisQf6EC4eHK1w6ZnL5yzEIIjX6OeOvdct_3jMlZW0F7Ddi3AL20fdnRkSWaaAqReU9e_x7LHCxWUlbdSpkGM.Ri46h.KRVQtPsYMHDhCPhsI7PIYCrfYsP2uEsK.EIhw.6YirIC1xYGp0FwJr5jm.4DWPeoIca7Q_vyNedsNyOQhA1cNG4HWi6YoMtYHmv8cUqhf9fQSuTxP16kRJqlsDD03yxTZLgasV8hHnehdEqB.zP4w4Z98vmqWGw49UOcCyU9KZdVBuYuyPkIZOAcDI68cfk4LHw2.SP2eP2Sw8hdJ9tjijnNNTpW1Gkz2USD.i8yx_B0gL1cWuzIhLV5wFWPwmkSE.17ruK_pN.aom4D2sjjM9lRkBMnFvTD_eMyLBwXHG9czrcsWYOYbYskjQonIat45VaTOjqly9Bb0HY668wflN9cPV88C8yN9LWKEEVYKh8f8XaXicr2BqRbzk4N7q.lezoajLxnHOW1Q8T0.mBgVE8Zulp6XrnO4CrOC9wYChxck.wdl8nv73aaSYcPBTgZ9J9JZKcNhV9Bhx7wTtSv2_nnaH_rF1YtIvFkjepYW83r_SkxtIcuXiVVPcLApprSI5C9xB8Mzf_UH2y2wK0jVQYrWL9LfG.7v2xh.UYXUh2ukUIvtXJkixLiN4FcEWXmG2_4dlNMXvKfIVdMhOHIrFF5Jaq12cHnBYkxHwPgyMScco1raIpX09.DyUy7.3ZdwGxknagXr6zqgJfvVC7TCHc0uJ370As9MZHbmb5tCDXti4tnEFTDkVRd_0KdvTO67bs3cmsZEGWcdVSQAJb6iuoTsjDt31u2YdT4FBwdJCORWeINP5pe2Sthnq7ehwHmSne3MmwbMyk6uc6Q34wbI9OP0qbCy6VRVN4G_ny0OnbNz4705qsGzp_QFEpPGgeiqir_TjZcjg8i9aYNfEgYk0_u3XUEUQy75fYncQoycR9Z3KogK2y3mtqC5mFc3iAgHQsBX_DLmiCCI6BevjE6A0bAAL60C63I7JqQvswqu2GSklhqGi88SvIu25mYj8Lc5T_q7vVjsSURHBkWD3.AIxvNwrtcqQN2NmtVK2vNxnD1tNbaCW2fGM8z6GLzfs_BvwZUumQQ6TahIw7wfQlAX99DihqDfGQMp5KrxtI_9KQ_dx2QUb1lss_W1NzJaym1SQkfdqdGicwZ5..8.ctVfcIeVgjfEXvqcjzOBxWfRo8edPzrgfBUr1IepV2ebj86W6CtUIxDVQ_QjzdzRGhImJYImEQMxR_vbM3I20.vvXOgoFd2cRK7.Gz6V0ak0c_YiZU_RkB.Td5pGjmi38HIgbqhM7ihEJr8EcHrYtIpQ0zDJTwZcgJfxUIq04O8jk4nBDl9LpdEHfe24m0lGBRuDfNvQHUjLMSR1tnDGC_ME6oElSmLXrOpvN0yE4E9KLUljHnVaCAD8zreNFBENj1PlLzX._3Ek.3qJ9zrioki4eCM0fdoOtoI2FUkFc2ObXY2.e8ndDdcSIdcSGNNRc9h6N65GLA_W_aM2Cyo1awYAvzMNKXLAOc1tGIhooiIaD9eMXBCswmX0bnnCkMNAr1yEmbVh0RDwjDfA8zpd2UDRP1cZfbq0AMjFmQXE4md71Ga.g5INnCFQ7ncEuM61lZW.XBxYYe2_L4GUraKp68VfmV2AWstV3Q5.2zECsu70wccmsRTASkMvNTt621jwBNttF103y_uQsUJaUFH0A89Vb0zXf1wEjR6woTrgQ4Bc6Q9TRPbTceyHm4ksZa6W35CHzJvdxdYymCKvIL_HT2jxm54Wn6.BRf71ZGn_WNVyZiGHQ",mdrd: "nFYQjSiIDrGTm4Bt94fHs6hy3ja.VjrPbLVjn5jtRv4-1739223764-1.2.1.1-U51.dxtFHwqySFBKTJ6x12ZJOtmA3ZluDeeB3dT4T.j1sBgq49KA0re3V5OZnDdNMMPAodk1k66rxjWFSdETTX_K2AVdlgSWL2i5tQ2Jhw_IbmDYwSuHyUIYJt.0LTumWzH.qRySSN_bW.jBSqtnHFzddrzVTEluNhDPM.W5V1CI9IKinxb3YH6at8M07Jyn52iXOzdfEoofWOP6.6.HRLQMXbP7EIiiFKLNm1y2qGPkC897VHdfDT9sQTa7lZF75J0i.0i61h1xYF.YbyrrKIuDtGI76DHzdgTmOVWWjttAZE9fhoghCoNVZ5Mr9_zdfVYkC719EJHnNwQ1tadEIBz7VqfNErhyVh_4q8XNgInDQkmU4etThuF.wSN_3KkiEtGtUAKsm5aOCrXCg_xuArZUFnwiwLgcfGcNO2cm1O61wYpRi2lt3Ki3vLzgAdBX8IS9K6Xjb_.Omi23I60NspXRKLlOAj3GG3Ixydn1tPItk5_9nkKzV2h_QBJ6wHejEJnZg6pjRQy4fNTMJD579q8ZRPK4ClVQpnx6CTBEG1buqdgf1VWKYnfGJ5LQNPrrC_7tkwNdi7L0M1wid0bg7yo70ocqV00ALjQ13yzE0g4s3rwPBAIrPzsYXTmZPY3xpwXbTA29uHmM5OzAUNjC2QTM.ZWq2SfwYgt.1lQBaUykkyTku.WOGJv.uJumd02eJMDT_Do0w.FLoWDOyXn5CTMrZkAxgTsS_Alht6iJBdG7SHaEkFl_er83.xLC84D3I8Mqj9PXVFkzWQRtuqP2EIsFvEj3EeKr6SaRHofXKr2iDsTyg0OW5Pm4Hn71PBbMmLlsuvdweS94Ym.5rotDjXeelVfGIl.Aai8IUIa4k5dDeSOVOuze.fYZ7kZyq3HRKmeQ8WS.SiSkS9RTzWJK.LsOix9swqUUtGxSVXZhrsD_IZlFdVq2TTfEIA4WPhrbsfYrK4bm0xGc.CNOH3Pm.H9z0b0n2Dlkrj84RVSnzfCkpflx_hO0B7yeULBYxpWAy0Qzrq_DndIrzMqiNVtd5SOSkm.pig3yq4SYQ2wG5LoLzEazDPT3ppw7TE0CrLmibUsb04kJv80.vgsthIgBwIRIhP5sqCo7yuma1ci8wDWgQAwRk4.MAs_FOcqTXwkXbZkvw5hGNDADrzT3TyLp1Hh9.5gJKRJKRH7CpQC5FzY1LpMXW5A7_gqTCzZGaCOW5eq041mVdsJ1l_hsHd4sb6Dmhxn.xJlA6.28JXH463w2hzPcxjfjY.lxAAXvM.Vz7dZFdccKoHRy1K6bp_1JECSYL_UboFepFrwOWvtfhnCkqX5.OnNrnyub0.RyvACDC9PlmKlVOJyy.oV_7yvl.iGt96EFuQUS9Us0nKDoy_Y2OfSyJ4r2ExTwPVCx4vcWztRYgukiUA29H.7jPn5HIft1Uai_o6eKok6M2MawtCUEab401i2HYI4X3X6waOzEr5NBRq6VBAfutNICqNbQnxGIs1AIiXqXb4bs4XpAIVu7XUO2st5BobU8B9UsJsRh2GoAOxJBHmtzDzuBdM7bmKfSYB3pIs8S.uZYThLsGCjA64npp_EuFH.koIHLkIQCgVdEyEP6.PHnJ1JqU983QAOT3dmbCZLsMRlPc8bk6fxq1UqOfgTz5EPDPTaf41qKOyjAdZpegwY7BpqK..ADfFSxXI0tjkHNGrhMWAJH1SPv0mge3Wi8ss9iE1ZG9hiOp5LG6xOhIgy5tad4RNJOHRvBt6wwltxovLLIc_W2b07UaxatC6bgpc0QT55.AlfL6IJiEbpWkBxt8sdliF5J6C0PrtY3uOWE6MVq6q5n0jzr9tclLd6U72ypvCl7F8ld"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=90ff4550faff2087';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\/644154839775?__cf_chl_rt_tk=KvL0pEl8uort9nfNUpJwAWGg_4jmM..QRcW6SZ.XbIA-1739223764-1.0.1.1-slld8YPFoBp9QQJeELiGnoAzQG3tTJDCw6pVstZUMfI" + 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