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-4876593021-gov.caltech-edu.pp.ua/post/139441716860

  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-4876593021-gov.caltech-edu.pp.ua",cType: 'managed',cRay: '90ff63e57de8fef9',cH: '4u4Ocw77CK9MbdZlJDCiyboUBHsL7CCzM.TluN36OVk-1739225017-1.2.1.1-pJy3pqSUnwe_DUQf9L6lnTvL_czic7CdlotsQY63EZlPg6OFlYi7JbsHith7PDlm',cUPMDTk: "\/post\/139441716860?__cf_chl_tk=TCyUxd0CjLB3BFZxZAzS914mXr1uHIugcYsJJpg8_0E-1739225017-1.0.1.1-VcPS0TOzCFFCOdlcBE_fw6gWEzUT0FinidTtbWtY7KI",cFPWv: 'g',cITimeS: '1739225017',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/post\/139441716860?__cf_chl_f_tk=TCyUxd0CjLB3BFZxZAzS914mXr1uHIugcYsJJpg8_0E-1739225017-1.0.1.1-VcPS0TOzCFFCOdlcBE_fw6gWEzUT0FinidTtbWtY7KI",md: "woZtqo2AXLvUCB6A8SSuSHTlU.gOgNM4KJEcqGqg_4w-1739225017-1.2.1.1-JiK1.gsjirkO7ZAtj33U8Glyx3iN5opyHGRVIsDz0lN.D_xht6SRtnilqmIZqwIpYHREyHHXoIxoujJ8Q1nLXeCydJxn24jbBUJFYAXM5xOCuQ9NYB0r8F04Q8IYAG1I1ZGYGhBhg7AcVKOKookt6lJMjdKbzoVw4s9GPt9hpB97wwJsi3ilYft49_q63Gk.Vl8jM9UjBLCIxWBIIq_Wo2Cn5bRLDusnk0mTI.dfnniw5JT.EcShLNk2xQy.i.N6sLr_VlIod.45IjoSRFoepPUmBEAmjjaL5ixi7TDLI.J.u5ALPj4wpSwnWQQ9KCSppafx1.lsLuf1h0Cea0oVwi7cCaCTRtF15YIedoJivHiCzwNoU.QrfU3zHk6nuLDWFvw7JN4UK6fc7TBcPW9AlQWU5ZG3NPVzx4v5K9mFzERjk5IUjOBsWE4qc_5_7ZAUG6untVkRN0TTtcj7by2PJ6STU0MSFlk6HQJRlx8swKt1NqwXqIGD45hVgXIPryk02fmmjWS6e66SBNbdbQVeLcDLjCh9QOJNE8Zx7H9tZKvkiA5ukCJQgZtFObZhLKGafe0dMUESHjxFOouS.OdSY.VXpM7KM5o6kpyyvLYmhnkt_7KVM53hLvFJoor7i3kmeMoa3s9EKyo.P0rfSNd1b_vxwZcHCgIWw8vqNh6PkKiwO7c.VwG4BtqBM20_nyM6xxk5uZGjtsKBa0sp2h7P7_mbOrGDRxbBnbx2w8k4Ba7H0MlqCrqV7U7go9wzEd_vJpfBmM6vukadvniM7IoeTece03w3jTEi9Umv3QwNCWQmbVf8nRPv.Sw8wfxbOFB3lYpZ_Gui.1HuM.VikHyJakwwL2WqhwAwQOGNkYipo21eGL8ATC7lmiYcwpSdPCYPm2V0upAy7IdnBuCkCn3JDwcWfb4bIh993y.fGxlKp5wiQq1B3DixbWeUHuKcVJC.E8CWlQ9UzXGSa1dubd4dNcudj952iZx_bQ6KHI9Ev_VcH9n7ZYfx2enBBahoS3dqhhwNKPtPxh53mQPXljPSXrxWHT0bRapJ3kjrnlVUMDQUzjzO0FXTG8osnLzjAqVX43Joi5zsktP7StdKZjv2NAibmlJf2UDQ.7lwAZynfN56S04Z_isjp88akLwQPd_TAgdCRGXFSUpgX.XQ7A9KK8fEBEfxvvWRGKOOyzHjh8A6xqh7LzeWpoXYRZ.WW.55llH9LwxIuIwKb1UZ2_TSU1Qwy6gzmmCQz00V3EVCYaCQL3fQJAGNcWWzxfb9yF7hsOqco7s7n0exFw.Ie_d9AayTUQ4l6NgfXMyS3Jo9oEdGAhuXMtFEngbsLUDbOvz7EsMYVMBZe4C8xQBZ9vT4HJMxB8ZjyRvv1_buIY1wLpohBV0il_ipRwXDg8CFoQTtR1ru5a8r02oXlObk3dIBG6fUAnQms_SgkUW2U.4eWQQeY9rM12n1Gkfxi_aakb.pqG4MiGKsJukOM7RCoDBuelcPH47gG5oLz0vni92z44XOVnKFipsy1St9XFaNBNcO.DTdnh1dfmV8IjMWaOpdf_PLgLfP_upsGCP2kR3lCJc86ZHzZ5_bP5YydGwYyQOuOxGN8n0unmGujKxTfqqRitFUutPedF_jorxWBjj9JPY8ur3MEIKWOEtzlo_FPm9wWlpe2EMh8h5VE7k8Zyt8ZYV17qX.7XU7kdKLSvWZN_Q1mWLy5Xm.FIJ._VAeBZ5dmin49pq9vpxk6dbg6e.feVNi2iyytkbRTvN01sEgycZUzD0IjAP8KDNDuJUR5PtgHoKsedMEaE3PuEzOLkpXlcR.H.YbpJSRVnzPWbVBVJR4vMlWkVJ1Vy9ZGxAicUMstSBktYApok4tj.0GlP6anP5taciE.nkHLANrbw2kEVEZ90vK1A4xuwNAz4LqlIaYygHSlJvhZ_frcbx_pgVznFsj4TjJKYVcK0cWjmldDJSBngL1xashDA2Vu7piKHn_4nbAB40GBP2YGU4bJD2UZFL4b1QWn8U7a.TEbq4l21Mi00Im7Vez2tZD541AeNq3sOsPLzU_G0Zj2plC6BUVx0D6AiPlgFO0d6tCMwaNHn2iGLakfiTScPo1dxykAO33fEBgouhf3gHuArzQ_HHv7.mSLZjpBYLAUBhhQMFn_K40N2T_Ald4UFfxmSx7B5NV9vJKbBsyDCaTpRzI.TGYv2odhjY7AyMqOmjXpczHJNsfqIS8nc7xGmd9wWXpTjiYA21c4JunRuuNmcxWwPOD9Q",mdrd: "wCMLYMg0vEnJ1R28.Wry4VyD4DJfa87wcNJl0T3XFSY-1739225017-1.2.1.1-_enUsvVCbLFC5GCosAErUvvFiqUH0AgbdXW0TqSM1hXOyJtlFoJgi3bjAqs.wYvI1knmgyQhkGbswEyGF.XowNNlNMZLdZ9q6R8jR2LWNpuy7FNiciDe4LVfzVGwtcIiKos89iygxxbBDfMxef2lPfJ_gtOCcAmCkKji4n1VBm6LvcwztvVz5QMaJNyvbPLnQsLfwI_T.V46M7AetXM.7Ss7v4_eyNcgo5FAyNq7O.bM.8F9SJr5pL8K8AncAgqGkgfnFrBQrNT8ANBJwKD7cJS4Yb.DKCiTrozAMBh6Zd9wJ.g_DCAGQ8ThIPEKm.ElMQLkJny.7bwNZS8cBVvP0OroslwiFoqULBv6cyO.R48_w5bFbsOszge7U7j30QxyqlcjjnJtCu5L_Zm.wBstoQBgheIn9SfBA7A7U1INgnwetLYT3oZjwDaFpXJueykf8EBsrofKOgV.e8kLFO9gA9f3Q3GJS7GvC_fUDYRWY3W3u2P2K6bCB0QiCG0uGtVIBhk3RemUneYhl4h5w2tX1lXLdKWGPWtJiP9m8bf9qmjbKzgf2dLLZmkGjKGG3K1EX6AKKSu3u.DGXdHli3c58Etob7P5HypZeDQY85RMoNnmvcymIW9KPeYgVcOpDDg5Peu5Qv52JLs1CMY83EpgfVFQf9a.WSM9KNMPRIXzP4ZLifHBaTLMLDJWbpZvSqdFoYa5bYO6fYTF9jkyWB2JtnOjMje07JkQI3GxH2uzJbBDxAOMqoofytLxxLovyS_txsQp7vfcW1E8e1bT8W38JxfX9jLWG5yeSDbAh3jPEuv3h9xZ3V_1CP6IJM8ZYSKicOWoPegFpafzZWqlHD.VLbN5HULjoR0ORUQnd9IHDIhMo.1RgCZVpq7T9Q83t7tMHBpLJsWZliqmiUlnlmetrdIrCvGcun0OOp1.oiBTrpScxx00JVOQmMwsosluKBJHAgVzO6mkPkp3FTcKdQHDOzGe_Zik4to6KSM19AUmMDPwXFSn_0hcSAMXAmO68xop5bwmnWLr6M0LXxvSXMqWSuK8fttPVumBQ0oCr6XJdmvxM9zVEqflousHTPiuZ0dW7JksRXgdoHfazDRrdTvtNW_.Uv1k8wkxMfmc9KbHxJDPdaoMqw0FIFdujMUlhbxP6diTuNhGIY0K3.qyx8y6I6Uq4q.CUtyd8i5QaHvB93wMkGAOUYDhpWxNQdJKGax0bKD8F72MMYiQrlKoaw4q6MemSZMvkgCf3AcsqwKv1L4nEraZ8FcoxJwnv_zbiq4Z7LIQd6rquEeutmUL.GYP50GOnWyAMoGWCEMS71kNnUssoSCOC9p.dJslIvzS5TZiIeDG4sg3ciADbuB0zczy1exDMe8EJlAJyntK4tJldTiZD9Mco3uQpqXSS.Tf5cMkTixXYAHm6.H0yElxBjyAzFQ8A9k3g37NlRhvQyXrBRfXY6iT0UhfctEtu52WuI.IkspECd9kVj6Z5QT4FF_rLnAkbaR9BHn.I9rJVlPWVgrBbR_NZc_TJBgnqCubEGRVcLGIV8AygvEoCfxfwkXfungvA9ildw1KG3yuA0t6w7urJpZ81UsGzI1syNSsSeG9Wx09.Vd4CxnQk3ypHb2GGWtgCKWZIgfktqx2ZJ6UY_rrri9scX9FvM_r.4Olor9oGkawCcDXJtLsEn_RJHsdwTIuKWY_Kw2G2l6zEVO0F.W_S5UL7Mo2xB.OsC5TzIBVnOtSAw12bpRM_y9P3ys.c2nuWz0Pmyi6.Xg7iomgLohMqPisDNQZjXQnd98Ekvjr_37X2lWMFjYO.74cxeGayHT0hM8ubNzdTvxqDKK4x.hAJNQ.g6r8l3Hm5yl0_Sgp"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=90ff63e57de8fef9';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\/139441716860?__cf_chl_rt_tk=TCyUxd0CjLB3BFZxZAzS914mXr1uHIugcYsJJpg8_0E-1739225017-1.0.1.1-VcPS0TOzCFFCOdlcBE_fw6gWEzUT0FinidTtbWtY7KI" + 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