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-4912860753-gov.caltech-edu.pp.ua/post/574038000760

  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-4912860753-gov.caltech-edu.pp.ua",cType: 'managed',cRay: '90ff88285c9b81e5',cH: 'xnrjbeCmKGoimMMIWgfwiJ.mIjf__iZCBTZZfltJV18-1739226502-1.2.1.1-LSXeQURSAT93.D9uHAd7owLLeonTlRaq3ATGcQvH_fRkc4jBFGTSBWOc7beAEcJv',cUPMDTk: "\/post\/574038000760?__cf_chl_tk=irakV4WfzDVVPJMImtm2pi2QLRLaILdgL_oboySRbV8-1739226502-1.0.1.1-2300IEQ1e1XDHwkCXZ3L7sNqwAJhcp9GnImZy4zu7ss",cFPWv: 'g',cITimeS: '1739226502',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/post\/574038000760?__cf_chl_f_tk=irakV4WfzDVVPJMImtm2pi2QLRLaILdgL_oboySRbV8-1739226502-1.0.1.1-2300IEQ1e1XDHwkCXZ3L7sNqwAJhcp9GnImZy4zu7ss",md: "y3BQsJZThjj96aQ0BFZ2RofXOODJY_umNOiUa8CVvHM-1739226502-1.2.1.1-uZ7DLhAaqIfqn..nvy39OkODUZbQ4WNajbn9pjfiwMyeiqNpC5T3xHREBGvgyEXd18tDXXypuxSGrfy3v5GBOkFJ.qvDmu736MWS6MsFPoeOo5CvetBQmfa95ZbfjZFjKDdBxOBRfchUhDeZEwYFYQUzlGnBh2ZJAHYsZymvy4enqfn47JrYr8RlrSPtamMf7WYPUAWaO4N1fntagUBUiU239sphFxhGUgc._YYUKrKE2d6RE1oNwmHzU9cMFQN5Q2wKVJ0FliOq2pZiJMY4HEe2q6UEyT5DEh_KQ8Cl3JfcFXkrUuvE.rnnK.lJqbxZfBjUbuKCxUfoB96kzY7mm6d3iwGF92W39vI1F4yp8oSHBFijr1hhi1nZBWSQM8BaT5MR3cU9UzxZ5vVa8r7KTeZ4m_EjN7Zp.hNmxMEkUznUweJMb7yEB.WKmrO7vtGbaFH2q5AZ0VuVUGLk1mhPAEpk1qEAnRMKefWtSSa_lBuzi813W4lg5U5_wKHFpT4jo3x_Jb7rN_M216QVlF8WuvqmVT8xnXOSPm5AiMmqAwJrJRrSBWlSqnjrfjASCrfZVq7F3KIqiVOwgbscpvQLyeuWTPyM_V.uVMldmA0QkJhmOcyQv8Qpa66xCLJHybxjl8pr4KmSmZ8e4_Wppx8_oFkxi5x9ARQnjUyTcsGl56ukAkSJThfw5DFKax7sD8iQygGOKg6a1cvmQON.jdNrwO6HMNcA6A96LtRajw5nfLcUviJqTeOOJirqJxoQgvGgK2wCprWjc6Alw6SGP4_jqyC4AGRpSfBbkgZeQoUbPDCzqe09MZwfKAicnnLmMv3Ej75n8VZUIQj_cENPzloz8qXXDfR0FewoSzYNpSUxka_R.jILpfsoudl8NdeopqVULbKMA0WmPUD2Sr7gYkHu99uLepEjtx8aYl0dAKE3YrBUfY1aXbh3DpsNejZL0VX_uF9tLUBaolkg49F3JBM2mOgupJ4kKdO0Uem4JKgfyhOdqN7GiimXBbkgOnJ.PiB_qIAAiQWHNVj3UopQ8mJqdr8jdcXMBPrJ1P8wxZfdTYPita0bRop12pi6rXF813j5Fh8wWCHEWyv6eBzRpRqypleuxHmlsQat0thDqQWW2JYRums7._4iOe7nqbOUEZ_PyOTWWZKLjYzn1p_KkqsrVT_FPKOwxSVRiBOctgA6HdeZ4cMs7O.1oy7iizVR1gbOPakZlQV_BHlVFJPAVqEQ3HbaoNz3VkxSpHx1zJSnNIoUsE61SQEcbWeh5m18bSP0TtawedYNQbcXxWRaeRan1Sgckbg26QJNzEG7GCDQx0XHcZbD7rfeormj5G2C3759aeFsb2UGaI1pP19ouOioGb_f3yFMl9v_256BeYEWg9uUnl2NAkoroLHQ918hBhi9A97EBdaZ1Vih4iNLcU9IeVYCtzT3Meyv6QnSOk0IAk9xmZkSu2iTXvhYQYq6CehtkQ4_mqtFgrkvqr4SJtSNYUG6wyLxS8zkrKNSjD4nL.R1aFhNVoXLl_s4ZGTL5lN5S5W4c4oXUUzsmQJGMKpiMh90Eve6FpNwlt.NgQsa7b8Cqh2GKuNN8SYxlMBW3hH8M_ksj3cnMmvpXthN7Mm9wALxHr0WbkmxUqX69fEpYx7tfO.znM9xwXbeaKVZPicY4urCp.91jsx9q37rj3m0i8.ssqB.2N1MuiXQQ7tnbP7q.4b3Zu9RqiYwYwkXHORdoSN5EkdwnW2DVi9GMp632jMeHvBy1LIxVzrxqFpYUOQPDFEJgLzFcfBawyiwymn5hShnpMkAv0QeTGvhwwWpJBdHPnzTEH3AJFa4DCjxF8MBt0BR5EQ8BuHGgjL8fhEx2TnRJ4Az4bGfGiaD272udStgom.Ra5tpsVaoyop0HDAdOw2eqXzjB1nmZZQ.wJ27eQ2NljXo4VDrfjiBQWiZUenwZQ_PvwQDMgpJf7p5SoISBBwFxvW0YdiAwg9Q5yiq4UkylCSGlCvun.IMoC3RqXwopKSf3FxH.VytOsudrsQvpAzW7orYzStNgkAlTnv6.wGTxpwMPavxO01rZR9HgpmMRp2i4qUSiqb.zbTIP7nJpFGi5YxuLiTl7lg0XD28_YfVtR4_MMbQrBaD71GK6yEbLO1scGlFr2Il_V2XMQ4.8X4_7vR0Xie5Rzdn3DJ2MO_aU4skcGOS3ji1n5AwFGsyDoQ4UygGBBO92FCDl3cI4IfhlRqOefRZu81qg3gXlDwldsiMcvhQqetSfqFbiQ",mdrd: "qEJsGhg17xjRAg0NxfMn9dF0yRCtBVo6utzQ4tuS5K8-1739226502-1.2.1.1-mamK3MPRpbCM_qXv2S6lWUh_5l1G2vqXLSk1c0MfCF8NcDhP_BsJ4U4nceIkTu2jwMWdBnDRF94twoxj2Okq8SmOfGKpXGkM4Kxzo6eUNxY7L644XHXSxH2XkTCy_A63lsWgVLmLS4vIfat5LOpvJjxqUtKmCeA_VRnT1zJIqrhRDY9XVdszyH8kg7CkeZYrUY__UG7TSPpJ7BWV9dBXM_dnRbvEHbpnz8v8mSXWJTRhZd.KSfmZbMbRli_GGCrJb39N2pqBwKGuGOB5hb23R.4SMDRXgBeyYZHj_Oc97ItnFewXRzUQvVxj1a8AvS0sInjeWIP_c0ONhbuvsCfPyVyY2wZtPh3UoL01zWBVfcoDmTZ6SsT2lUisDg8WywGbRFBGyEs5mmYfIqMLEuUFqqFUTMPzgBorMAbsydna9vwHlo3vSFAb6diyZpeUX0JVn0ZGeOtX1yW9dp2WQ9SQDH.Mmic1mWKzlbI6IvBXpFZTP0JlKiy1RK72Obd2ktvRZ5P.DuMw7OGrTzFDqyjT38OW7W90AIijolphi.iSEOgjjUwQVLVoYXJblX5i4xZwSw_vVmFyt8Rzs8.7rnHd_Ma19S..fUPGu2I_GcAVDxxY3_aFjrkjBAnz1OzdeWpbNMlOF5E5d.X8IrYLq4qHBzO7hy7kOKxHz4sFIm7N3SIPhkDkv0pJyiFrCV0aS0vBFMk4GxdE1s9P1AtVPmasM2IwM0dVXwtdklJSrGbQFKENH_4AveS5AkhDwbAG7WqtOOG_iR3oNT2kL2Zo6iPBn3s2qmOvOCEoQUjimnqJoTomWTB5Qk_sp.Mvsr6fQdVNxQZipeA.7fyXSrHuFSkNoZ1b6_3_Vxj8UcRSnDcVgatQux7UDh8I80kSWtJsjRsp3Gy8kwt2yHQbtncf.IFYPUR5tjH9CuVsnUbIyGcLotuWEl1inMD3z54v00_r0dZk9eSfsVtMWQw.WvZ4L2R.WABgd9mHgVMUSPck59ge6CkipcQ1qLMJ6FhjO_1Sd8nWPSxbpvkdNpvOFvbc0q3u7Hm.7Ziykqt5_looB.gEiSvokxUb3tZLC_qqMKGZJsgzAAbIX5ceYwnEWdwAFIZhBbyzEq5ysN.UQJjqqigUJuhz.rlpmGEliAoXVujtIej4Hw7fm59hXCWuik1s7nAMZxsbV6QcJsQIsf2jm8LbrJI3Brfff898dGuJsNXb.7PEdZLie4mc8.WbhgP6iqIha.UgNhmE0mydhbYZgqi66qHnUgAQCijW5cS2SqPt7J9AZ.gPHf3PunWx4c.xqccfxdiJC1PnjEh8oZaJUm.OAoGo6uHJ8Ua5hZ9lU5LwTBFeR4oFNWz1VqCGMYg3Ms4pjSon.JgmEMMgPDpfeFOGA7_QgBnsu5CPX8yW7Qk0ZT8WbFc5A7j.94Dl.Tsu3veW6TuxgNCTU105HJdPGaxh0qQoUEvXo7e7PJayStOwDnWyt2OKdDftUXXeoBYDYVeb2u2G7exsO87aCLVtMqf6EoJEkBq0pRu_xt9k_MQghv0AwlO2kyPk_C.blBmw6S7YhLqFKiYsfHpV9WQYJ.HcjskQC.D1i5n7R39fWjFUUaW51xhp_pwCdcFhYkSd2TFELcBsF545O3n7CkVqhYOPf2_2VOmyY_l46wzdjdXDFG.uwzT6Je.AID7MygErgL1DmnFHkhY0e9sZzOu6AU5Sa6SaknKfxYAvHWno_LLpd74ai.c1JkWRIY54i4gAmc7qMGyPawNYAoFL0sKdSQDoEv3_gg70RPIPfHAxJfnx8xB0o5GFt6taro1mIK4.uWxISaUWPYf_UvCfHkg020UkxM0DZ5J.af2ci_W8GtygXmWA"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=90ff88285c9b81e5';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\/574038000760?__cf_chl_rt_tk=irakV4WfzDVVPJMImtm2pi2QLRLaILdgL_oboySRbV8-1739226502-1.0.1.1-2300IEQ1e1XDHwkCXZ3L7sNqwAJhcp9GnImZy4zu7ss" + 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