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-4307169528-gov.caltech-edu.pp.ua/post/4307169528

  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-4307169528-gov.caltech-edu.pp.ua",cType: 'managed',cRay: '911009d8f9d0527f',cH: 'ZQNK5nzQSByiUVU9gxDMuphzmesO01prdW4DXiMVwy4-1739399586-1.2.1.1-rb5IGqKUTIvSOOhVIR_ogPt2RfFYbIfrlPWWOktTbeRokJQ3F9Dyspzwg0iw0luP',cUPMDTk: "\/post\/4307169528?__cf_chl_tk=Ig2L6sWkCmZh1yjWeMfnZRGRwIKs1BzWyUAksZpQP8A-1739399586-1.0.1.1-FSNsb1wOTmC5CWwMuAVU9XA5x0u25vGrSmiFiagWW64",cFPWv: 'b',cITimeS: '1739399586',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/post\/4307169528?__cf_chl_f_tk=Ig2L6sWkCmZh1yjWeMfnZRGRwIKs1BzWyUAksZpQP8A-1739399586-1.0.1.1-FSNsb1wOTmC5CWwMuAVU9XA5x0u25vGrSmiFiagWW64",md: "qDB750Z2OjAA7v38_wUJFVvzGN.iADjJ4YIZU4d5as4-1739399586-1.2.1.1-5bOPzTLUpw1O8aPZImObM362smjMSNUMICmjihKF69pY2f_AVX8bUxjsTJh4HgNc_HFnxuG1xNbhoclfKYaWCZNhn_EUTpctf6V8pDKn51nN74uvT9QFfia9RSDpIIEpYP5jR7sTpcF7yM2DrEbaPVwET.qLMgjfDSvacKR7u.RjZfeGhYthWELulataCTefBQGvk9UUo4CNq7jf04IA0Kkmmlc92i.3szzaVWArSd1iBoYOKhJIJrf_zViGrk_wWmFMWogkGvdQjzLAQ5Sks4FHjG3dgpzLScSk5Re40zPPYtvgb6hlC1iYjFA8zsHx5Taq4IbuNL730QVDFesRklo_Mwz9mpXe_meklWaa1NptGxeCMwI1ZsHhoVnQ9haKtLVL47yOWjfcfEB9quKn749U4ETJw5j91IHTUaXUCxIjYbscxGn1rpQfXmkoNdtg350fOtFc6YUZcbYpJ4hK9JlJvVFwA6Z7pEQdaIWcSIOJa4otEsKsFFqgtae2i2gJ0fL_3Vt6poxyrc4Nc6h_GyHzXOJ4KEDaCw4Na9czL8x1U05cugq.IX6bhBczZhednBKSkiewOXzc47fa7oILfuJVyvJvlPWf7rihLdHWNT2UCa_RYG0Co90NxQyn2bTyhoVdgQ0Mz6k3jtoiFNK_0Wvn95MKTEppASNhYlxuc9pJ0Mx4O8c0ey9FdJ9oa0DL1DH6J3GGzy_OjbQpjUxzS0nY6i2bo39flnKjygdATbLo8nNaPPrBvY2otkOLrezg_g.w7zsGAq7s79WWAa_YkmBq8fDMVhhrIT4irYnYNWnfFKNcH_2Vpcsv_jzQO_JJvK2cfb0_U1MSPHEgf24S9vF34PqFEzDj4VfBr5r4gy2lr6KELByZAKaUQwI5DdGinCzYne9uPsFSjspa4XErqf631u8o4POzLHi2Qa_oVLg4RQ00r14c4ftk4o1q25sxOr.NeEInEs2dKOMuDXEWDw6KKHWyH54PLfTzJEeqhInGWn.ZvmVlmrnHJRSLiYoVIQXUfA4qlrgJXlO1ucFcq8akKHpCoo0i98K7kYFJeO7_tewDUpJm0KvSoQZsbV1RCrZacl6ZKWDBm.KAF5ePR7i3qvgPNmkfP9MXcDSQodwf6OXvA7gzFn3iTY7L_yHR1KunPwHWetq4C0bjnPCCuRxVd5PgJD_j2IlwN496gpId1sr8Ihtu4DVJRpyqWONSLiMcAdQ1pKK.uZN9GDC1Xx2DO8jL9RDApcPeuOqndOC0rlpvXluNAlTjFzy5D9wqL3J.1JLUMhCmNKsRr8C42uQxIi0jozR7o2QuMy2eMZa1isQGdWWm_Zjwtn8SN0Q4r4y03KJVOGt3SZcTaKuF5VwU5vZtDZb_LBCrKgDLzzqsG2SvyXRVpQo.LUHySgz1yI.hYgRstwBU3ylhphYxeVpS9OKPO5Jwu.q8XAhZVguVWufxjFT1C8ZV2XNRkixLmGx8lC1lmakgkNi9pw9RhUegsZgidxel52Z4ukj0ocY8okPAC2fio2BqXTI2hAlgccx3taNrGm4MBZ.RLlO7CRy1Ibp_IeCMSEI8GTmUKOj3._IDDMC6u6V3B5_Nlf9HmPvL3gwignkJXV3v_AZHL38sAnErCNnWyV7hLI0n6cxMEHaWc2VkVcAnV.CqI2JmcU5BHJqrl3yoh9CTxBDzWjgo9JL6Gg0Bvg3N6QeGd4aAJ6LKgBSDesejDNBL6oerKwBsMnX.CRZSaKL7LCTg8LMsE.UC30iDYExOy6rsqDS1jqFg3LIYKQ1xk2i2BZy.mGG9DXRHQ0bvhX6IZx18hlKvYsJIN2_Ao7SJq5cbyV0xkPRvUC.TVa2Q56DfbXQZiG_2CoUi7zMe4je6WhPa4X7g5gLpb7boHemifJHpaoPINqcMvq02J2kaERqjRHTdEgdy_s7JoGBtQ8M50_hgqDKKMB1IdIHAiqKFw1GI1BD6n4vP9DeaMG0WXd9U9T.0u9wPMyxStLrnPbS5m3zhotCbrJWLlY7ej9U.eiSgydp0Dernj7S_TsxQMytCPXdQblxRCkkLXqnb_KbWm2VnjzYUsKtw.VHzassuqsPhKnXTEiJPjU01J3FyZNRHLhiNuxwQwqfD33ecAd_nrdr9kyEtDjX0t9H2dp5sJvY1cmMoWnrLQ6pEx6dtFKo5arBRfm75ZGVT66qDX.ioPS6xSbt77x5oaoJqhx16knn8eUBFxHREzQMxmLezDnwZbVU0ORaA73Jm3a3tAISHHxLKHg",mdrd: "wzUKCYI9BbFn4zvOX3rg6UdehmfRZ.jKBkPN2S.99Ig-1739399586-1.2.1.1-sCzjnfh3HF.FgjlyKZIGvp21IPlZQOh1j3aKFk54TymQnXRorl9wRRVcZPRIKz3N59zgZaFbUjuUtnue2z4wPLyS84VNpy5J394j5CZ1qEH.aglXaEl2kLUH6NVpOiGA_EfXkEkOtAXAiduNWtRecEC_buALH5ABpR6IjYYrS7VU9WJi8NlyJALayIMTdahCf_7iF_1Y0VVYpAxQaR4osoCuJ3QcaKB.vL1haRWsd6sZskaqxotLJdogh0KzjDUJvIRYBwI4M5sXwUTNJLjRI2Xzqld.lw0i0jGBCxBpT73C_wFI0vDmvMh2WK4wZ1p5rcUFnQLb5fXuF9QmAkCaOqBjy.dZGKjnuXfHL9xZNeQxPKUs.dbG22rj.ZNgDR8yh02sHdoUGi4uUbNcSzxBxuZXwXRfu4GUYLwMTcIm.qfRLmR1hiisgAUm3auBfYTWCzHsof9GAAcBBGXDiXxQ4xxTOfI.vAROfgMekv0W8rZx.N7AtGe7pY_zbaq.CVpOY18XbTzX1H9mvUsBpWq2XanRjiujawxSsEW92ZTnd07ASnHfKe8NcZ7mM1nj6Rxa1k.9hSfCNn3LZPSXo9gx5F0ZpwVvKJraMOT2y6hgQxRxAUQLZT2y7IIDCZmvTLTTQBXvYr0xBr__5YM7PEO23JfhptWprDiRfaq9d4HwYjYyp6yZYh97JWZXSxp3NriMD89FE9TsCWbuyZgWyLkTZsTTjmI8_VXd2HGQmniy9iRXtTenkVxYZSsfQLgytlIyPvlC2M1XlaOSaeAroBTX8UriNjo21hR9_S.9J9pDvEHaLHVubJydey1DIc7zXmLNPoedrDGs_6MZIMmVGGcG2cttSbrz_leZlDDHcV0IIvTbz_thbfiJRIZnfFq7v4tHY5jWiEh0UcVjWjeVav3PHN2Oa_D.pOrXy35EH4TDNfSHwP.ESkZITFq06BfiZT.dC9C1yn6roY8oKE73Uv4MGfFHx6CF1eHm.6l.rRYe6.VToNUwuha2iM0na2ROcqPELgyt6lccaLjIiuhWlckNf6wOoMS26Seh2oCEXLyA6GcjVNNtHHGF36PSV5IPRvilsAfXM54rU8Vg4_V3cGUBSYMfBUqI3aoarm6wwaPjVzW.sOZhw94YKjB6deB0U2Qv3uma2bhpvx9PhrU4ZjsaNvCAfayTb_95EO9Cf5r.U93QU3auCt0VqtJTRd_Ff6eV1LU2gw5es4KjdYMTP2WszfbE3nxV5Nc3K30LeW.U2AgUrHCqJPYZgQToJLCSfBnYtUO7AAmy.TvI7JVv6TdHr0PWLPGZ.yhVxE4ErBJw38i6hEaxUzARZv0rF7i.3iPa__ovXTqu9t9fOrYbIGW48wKy8QYcsAxtc_c9NBiSzXQgkioRptYg._ME6jQ4zyuU0SO2BAnLltt5GsoJzXD7pbz7ovSZtbvIw0elGYDX2D5G3RIOPabdpbkVibouFGE32UJYefxSM20SGMPaKWJISyF74TCwCKdQb0jecXziRk2CxFNxe_Ok.J2z1.bP4UV4viUc1M4vLXlW6qnin3EIKKSqWpnnX_GJ9Ky3fxUfN3ZRZmuyAJ4oTBsq3OWGQbJXWYPTwIDx9gpMDpHylhGAr9Z_WMiFDkOBp9AGvEUoROUOwx._Jhsz69XuiVIv8ZWm13GUPVah6KRiqiAn5yLCVXoG8wEMrvYO42aiO740sOT3IhVizHWI8Z.SKXc3k7sSpVAj4dY_qhYR70qqEywKy3E3hSrL0yayCc72TED7wbtWFVz6hC2btSg2fdqFS2lg5PnZBQ5SCwSjryUck72lGSST4fMapYFo9ERiyLozJgo"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/b/orchestrate/chl_page/v1?ray=911009d8f9d0527f';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\/4307169528?__cf_chl_rt_tk=Ig2L6sWkCmZh1yjWeMfnZRGRwIKs1BzWyUAksZpQP8A-1739399586-1.0.1.1-FSNsb1wOTmC5CWwMuAVU9XA5x0u25vGrSmiFiagWW64" + 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