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-6759482013-gov.caltech-edu.pp.ua/post/8574920631

  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-6759482013-gov.caltech-edu.pp.ua",cType: 'managed',cRay: '90fd60d53c26c977',cH: 'w.K.Z6EwQJdMjStGWa_iTEyS1OtVkDyJP4RI8NP8tps-1739203920-1.2.1.1-5g02bY.KTOaAtGCR.P34CnxygbjX8RllMFYhkNSkStmc9wE3xV9tQoLomUaeICJt',cUPMDTk: "\/post\/8574920631?__cf_chl_tk=jDa.F_Daj8i3jWlezQyUXGmzA8Ew2xBbs3GhXzt9mcU-1739203920-1.0.1.1-ce5fG5fwS4W_j_LxBHWCaG.L9vK31uzpzfG.xKSpOmw",cFPWv: 'g',cITimeS: '1739203920',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/post\/8574920631?__cf_chl_f_tk=jDa.F_Daj8i3jWlezQyUXGmzA8Ew2xBbs3GhXzt9mcU-1739203920-1.0.1.1-ce5fG5fwS4W_j_LxBHWCaG.L9vK31uzpzfG.xKSpOmw",md: "9Lu_hzqXXvLcOITm5RiWabocVE5us9zxDKQ1E7rgh4I-1739203920-1.2.1.1-7_X7tt4OLcdObDiCYC.GdkfgtdExTfTv0A4b4Y1LPIKwW51aaifO3m5rWBjGWPW9nI2egpA9blnbGa4cYmTBaFk8JOFYw1MxDRUgUz7BwryB4F_UlvjjbI1k1uvhwFjWc__bPpISulVyM8lD.RO7PpU_pDmqYkqrppGpI6LaCKDqtIBZmKroHRQpGoEvowG._20OK.4brsNCQOX3NinzPtwOrjRdPj4Yy4KATDWS5Hg2MuhROrNkw6Pd81s.x.ggh8zCW8C3csA5SzYX9VeXQB8oRipWXnfEGH.PtUs.32RfwqJHEjphGRiwOHHsUVHoXqYSha0cwsp69apmQ5yNzRs5quD3SYIdRaZrhyIy7PZQ6B4PkRsLGBHz74JVBAaafWP7aJdEo7e_sBy4qETtHkW.g0VwqNVA8Kyor_ZrZ3ftRYguZiFrQn3dI8QGEha62bQw7LNLVnkWuXeqws0r.W9xBSUVcdwpv2U6nNIgcTQDWcicElGetnjY115juncDMz.QSPn3Li9gU04tEPg.u5x16tulhBzJrY0cS2kGmGokbiFGV_7_F_T6.3uGLWIwzysJx.KmnNd1U_F1KWF2ZCqONbW7JNSeBdJ84tmlX0nn0Zr9frieL_XN7xDmgpHUGA71iJrSik0Oc2o6_0nVJLEPCEmQ768WS.6IgI7mvsZoNY562o2BJNNFPBxM3vJaOxj7SDgAnTB1e0VcVaSZMeJGmeOnkgc0fGqBpMXNcfQg3stTRlAnxZPdeQlOyStSc3shuPn6BJT33Ea3JqT3GmCUz6Swzoz43Z.1t7u4dlrHqI0xtw3uYXCUlIJmL1VxpoM93MSblgUauXeYliCl6i89pJZMXgKVNy3SOWlGDHyNMwNDlcElvHmKS8oiy.UuuaF7fW4WsZK_jDTXS0ZfzcrTmY_IBfTYHhjNQlHN5fdnnCwsLa1QRFBhm2O8yPgTTZGFj3g.VEb4HPT5uohHOrRlJ4Wxix1pstnE1Irx3wLZigxBh9_GtxkEB2EYQeq.BSaMED3OOe3e_4.XEG8mhCx0.eT_AJIamZWbppzSMG6GzUNp3vLPGs3igErnx0qqHoUl3ph7g.hrq9MrWb2riW2.OYG6kaBBhwhCc9YRUlsY6JCccQKa8UAdfVG0UGEHeaSwHSyrhy32NLkIRJv5RGnu0XmfGw8_62Jmti_pCg2LInnSu4scBnSguR1OXNko1etLpI824eROkfqiydYBbpOfAXamosbQ0SfDBeEMFoXTJh5lbpSK2oGyz.IWIC6Ew8z3bljIXG55xYb.xzBpYiLLwWI74YCnmac6dqM8CWutfLmwJHlgxn0N9g1I1.0eJbBBhc8x5hNLNCdbNY3y8GZ4LYFy1nhNwll4F01kJhwGuvI6OEMxU51pJNXcsbPFxI9QN4nsC99yJuiKvwU2ZN4CFA7gRsMqxCFVClAs49S6tDZ.dFNS7U2svW9vKTXLrAsxS0bkfsiXQPuANlG1QZdkAvCHQJGku43quv2yHWyM1GYygg3W7UpgNhObYuzTar7.tB9oGf3_PLVgUMPWGB2rR.n9Uxz0sIKIer6ZZFRmlvIIqxUrN47iHa0PTAjGO3sAnzzo6rp77avCL3EUlPGms0HTQ.X4n3DJghCMdL6VJ_T5oJbjP.NdQr1X1N.1PuXniIVfKxuLOoSKHkzWggUtFsEUIk5Y485GLx0AqSOcSxlZca.MAZRHQL.ReA4e_ADDQJUA3lPk29ZWsbat3rKZ4DcWpWlHkMiQPvISYWe2tQEad4WcpFcqU6.JBOi_ScfdNu57uRUPsV1bvPc.zdhrMooVJlnmHLyQeikZe0t1AHkBgGTVCpUtIKjCz7QRAH9kOOBoxFKPeYz3TZCPE61OSMEVmAQAdDSi5ic6JcpjvrUkTrx83CN25FYBw3B.195wv0mUiNB5cF0LA0_H3DkJMXkzYM03dmFijX88BrjMtsgimMEw3Y8PmKFuDdWvQyP2pxtBHLArxdkOnfdpAcx9MGiITwF.WNIwjBv0SU6NNre.ZtEq1x6o2QVe934sOixElEicDkUZpXVb16CZ2820RU8LxAoWxr6b3VMnELs4UYk0HkuXUqbHqrdG451aSr8Xp_r_eu6T6MQX6jwj9vumHfzZ0prnCfYKVSfcClA3r.N64C.LImveR4WR1qYwTLxz1fIUuUFyABxYVrok_E0PPJSRx2ty_.XYYCxPvj_.YAEybX4jgFNjOSmfiQ11qyZp_FKEUqVxsfM1V_55cg",mdrd: "A0k_DFDcvmmKHJI40vSplub7iuGWbCoZbF8DNWZAz54-1739203920-1.2.1.1-OUnw4kj8PQXufJIAJCZfSYoPUkTpAtl5jd9sFxIRA_TMcmMjlgUl.BEk9CgFSqzqX6Vy3N6yVUhJqAuTQTS6_3Zx94RQvxh8y1sXqaMFRrydt9oNOicWPz74_GHjzFZIQiPpe.f2NQvsT8tetjfaN5B5bPi8QnH0_eZRayJeacG.LOkYYrfhMUj6HfsP_U4nQ8iX.acFiqxPdUT19hk3TtKbSq9Zm0IyCddsHyreoQ82gHvvn5feHUrGhZKDgdsjptQeTiYP6kSO3QoGg0j68LuXdY4OcXDciszAqeKD1NYCV27tjG7clmCW4yj6Ujdloyxkvgf_cN5ONsCfbYAnkQMUbQNzC_LS_aMb9MbizFaDuNlMTENScc7FWy3pOY5IPr3WgMu51O8XUNUflhWu71YtEBdxXeTATSax.q0W.VRnX85Zv.WeoFYqADFSqT5RcKoqVxbopzT0Z_6IggeMs0nTlyGh_K1b.zR_yqA2VJA6ALt1FS9juxf_uyAcLJ5.vTeyEwwE.SbsagFOhSAHnpE_PwwL1ncG83pwhw3XuetV0HNVP01wbHLTHOnzwFkvdh8iOIsA46mee9nTQekhO5zubRbwWC0T8qS0UpoZ1ond3ZT.Yn5YiBl_b5VFomCoyor_zNieOSGZfkq_rKj8s9jnbWepPq2P6xjeI.bxZMcVN2.GXGgnD9YxqLqE4fSL28DzbGi7K_3R1qZ7WWiaXpeQmIuvk4C9IHE4JZyPhTSQ5YwB09urRWg28o7nsimbzXxijSk0IV_sCoXxN8FoWt2p9x011T638WlSbEjri5d5tYWsoJQRAIGGmFQL2PCvWcfZV5f1zTUIWu0qERrukQEocxuQEZZXmvXCUSyPHPXIihDkDkcC.ar9y_.zJLLtWg_GyWluvX4rPtz6_oYHsut_zYzuzXU1Z0p5aVraL_VTbroKVNHhSp6j2JvCdctU60cCeD9biVUuDdCarAqyAgshpf6K9.vMv7au41Or5xtMw7PHdhU6n.gcf_tiavrLfNlDfCzgMYOs.GIbpgeopgVRQ2PlO1OCILRoh6YrfgshpXFnIM_ZMe6RH80JePDyyZU6oMdXbDYXLMXs6BT_ppV_RMESxLv2ztgNGYTR.InRDl4XvfekyJdEL7JMFWyKFhNH8GrCIRxN90e1r8XViRQEm72B0Nw78Q5WQ40mQhEIJsgpyPBl_B70.MBx5OFHWSK_IXbizLwJsbEQdC4PgGrfdWrZ8b5BxzKiY0XhXvTj5j.pV5RzCVRb7gxvuHlR_hnphTBS_ATk4TxrQVIhmThlbusZuu82ILMNnvIzlk_8aIFGTYkAdvDlTwMskGZCoxBH4dms4cIDfiByDf_O2o6L5v_xmaaKTjXBhjrkp3u4h1hwCV6SW61uprRdXWC3hoXjwweZliOef.DMRZ6EI2rbG.n.5G3ca8YUQVGEMDrU3zETZlTuWrg3R7Azcc41J15pYhzAWlkduOLqNqCjbU4.un7fmjKECnPb0AAeES9RZrrgevJrKeqbbXeziSy5iw7gSSdWyuAc1Iw2siZ2bk3jKn_ytI6PCE6T.WPPS9_LxB8ehoLgujwzXVcbMMiZWufFp0o1jFwKAep8Jyaz0gM9I4wVKBaE5ws6xHFufTplT9luOUagvCq4CacRED2jcsF8yz0dWmPlW5LRJFvCzCYwYEYLq_Cg6.e3ROAK6RrYF6_8UW3qYxASHiUN_8QQXC6lno71TqgFcoaNspBbaQyggKeK3MrVh_DemMrYuCC7Ki_5.Tnre8C8QwjlJNO6Z30vbeEVX6EZQl0nUTaF6r7olhkZpPjzjA7.3J2UKqU"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=90fd60d53c26c977';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\/8574920631?__cf_chl_rt_tk=jDa.F_Daj8i3jWlezQyUXGmzA8Ew2xBbs3GhXzt9mcU-1739203920-1.0.1.1-ce5fG5fwS4W_j_LxBHWCaG.L9vK31uzpzfG.xKSpOmw" + 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