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-0362415978-gov.caltech-edu.pp.ua/post/0362415978

  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-0362415978-gov.caltech-edu.pp.ua",cType: 'managed',cRay: '90ff5c381e280837',cH: 'vHorrSs.de93m8h0qLRrl18SU3sW4jyfCXoWWKUGeus-1739224702-1.2.1.1-0BcatvslHilihUH1cZ3rGkiduDYT6FBrKSRPQI9y7eLa4OUIqgddaUWlZgKaZP1I',cUPMDTk: "\/post\/0362415978?__cf_chl_tk=Sw.qAHPcwEyTtsE_xYA83QjGCPWUycEqUlRG9A1izMA-1739224702-1.0.1.1-WFlTlqdqaMKS893T2HLt2_d6QPf66blBZPEln.5kQY4",cFPWv: 'g',cITimeS: '1739224702',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/post\/0362415978?__cf_chl_f_tk=Sw.qAHPcwEyTtsE_xYA83QjGCPWUycEqUlRG9A1izMA-1739224702-1.0.1.1-WFlTlqdqaMKS893T2HLt2_d6QPf66blBZPEln.5kQY4",md: "tdokX7IhMEFPyXV1Y5r5KPxOKCwyrETmni8rJVEQzEY-1739224702-1.2.1.1-Z4uTxHoRQO9lOncF50x.aAv88tpsVCdPRF0yhnjRJzwUVm977F_OaKZkFuewYdZ0ebB._GJzMr2WNLQkxm2DukmJk4mAqGaKxflQCmKgyTcg8SSk_Y3PudoU3J9pTujhXltWiVtSNE.K7z2m.QnNsoi86BYdZ6X1Z_cGdgSpSpBtxyH7jYwDbzstabReuk.NHStjBh7Mf97pP29FdK.97h0AHSBMDazs9DlR0ZV1bzkFNoGoWBtwBO.HotdOCIJ5qe6sET.fZ3MoqtsdYHbH8H5lT79wU_vvP9x0L6hiX2yeIRLhWXslF8f9wUTqAyqHSO_i202ntG.qzJCfdjXStaCX89RVR6WzuemvrlY2bc_WoWGfoYBg6ASvNQ4KT9x1IKgEi5cFA0PbKBgdhQFLAUsR5aqUM0.nenmtN_ZvRPE5l4grkb1Lsnk8QCtotf7.dSEE8GWc87Lhk6OoKCaTdHiu40zgV_8.B9jYi61fA92u3wmM2OTWxmvqdB_9OmFwVsU_4kOa_MpXCVOvLMneS8hZxyQBn3U7gPacuTMCH_hilOSwuN6xjHq.OvTodU5qnNA5SNTB2ygLsU8TtfM_oKK5jBLfy5w4lkJOhImRillLwhRgfa6oZMP5dbjqx5lVBPUVDhUOTRHElxgEQmjmwE_XOdmdsmCg6XZOv_9Iw._m.NywWCeiwyD6MAySJyD.3g4xJjEwT6cXgDv7PkWR7Fei55QjTTVwh2FDy3p9V9wJb4_UphltNxYkQ9V0k.ifWE1NNCrFfDy4PeLgkgcONijaRkUjTiu84dBoF1oP2NSZgxz2JJ.PQEEnndwx5OPoukoigGh7p0a8HYaS3LmGH1uqIxnuJTVqklTeII.FVizd2UFjqpSngvndBqFdstaSYXDi3WtdhI3ih_lvlfbn6wQ4xW2Z7xy2_FI8R3EpbyeQ63RbOWguxRwhxr7s54rVXFWG5EpJrNiajr4GWBQeXUChvwbDPIQvCE8NVSs.1ILjSzihUeWbKCMI.oAA4MV_KM3UEbghaefE2lHBd3..k71GhFr1h_.L2NIvURk0gFcifiyg._QLGsryiZWhzg6UonnuRuYN87QaluiU62h89eeVhu4lwG3yJgOCpOI32vcyHmQUQOxR4n4ILiN5FDhoz9p2JmPaUsqGVJaqo8qtEraDJI1RE0nM7jMYqg9XohQzhzxWU1VSE9ERjR6PqBChQKw_KboN309JZLQh84XD8ckTp3tU8VnGNQ9On9I9zUdZkutxEIMbzNH86ivnGsromrRCM9Eb3OHpPqsLTwnXieCwVAgAkLhM2MZSA5AG55NS7mGNNSIJ1IRlAye1lsqOYoAhF2hXOydbiB46.OSThj.zbX94kJ9CY.sUXiMUvr0rbRFobF31S3fS1mhMksMHCW_nzB6mqQBQyQdJjlsHk1NIE6UTuVd5ShnerZqZ1bPG8EDDvaSU3ny1ISSejYWfdO_.sezlh.A6oE4LWlVW7zvn47BJNE4x5egB0XQ_85qmYCQBxHiMcO7o8DC5bmB0zlx8FFqa87V0CK1nbEKo1e34HCyClW9to1V.c0zdyYBZK86aACFLaGvMgVLloAmBChsXpVxg8xA.Wc4gnSL7U4Sl8heXIfnadeZ43bPP9PtyaajoLpX_DV5EXNrqo9XQehZriZYgHPU8i5GpRMU00hjST6CKqDkI0vZA3pDQc6PKFf5zNUEn07s9.pVsnBPDaPCFe.KxZ4VO88h.w08TLkcL5yNwIMo.QrH44wC7O7jmFk5Qaks361EOZNzEGgyzJIWiPPeM.O0LJpiQtAmmgj0zzYWI7xPHtfB8x7vsIq6S0x61N16p0_mntnj9S3oVUmCYGIbqTILcda7Qw0sWTW6X2YJZ55welwFj7FPISwvpwFtCOnPVUQuGUUtE2xm1Aoe1mZ.VRkEidyZ7jEMMMbIEbpYw01drHjw8QkiI3I.PSf8P8HE86aRpUUdlcfDGLloGCSLkvpT568JuAXC2VGmNuV6L4QGyLJCLhglV4y7OiLYfwZK5Uxz7ZX8.hvO5E7mvRUUKfnoVeZdKnN9EkDipaIAGG8hxulgN9KneClMwLhTCAYmOiE0J4GJdMOJPvXbfSz56c5.0P3nE6LEsRDdNgpqssITA2F2wtrNCi7eTj.AwMx2mEnFtXkgn.KsHSQWh7suY.wjiiEgGjNyabjX7wwM96xyuzGslAMViKGsfaFGnzvGC4fnLFzUUf962A8v4ijIYvDjFH0fBwg3kfw",mdrd: "Ohpvw4DBuWPwTZicdmLD18_wBq3qXuNrtC0WV7yheh4-1739224702-1.2.1.1-WYo573rV_sMNp6eq2DsSqpceTNcNuSUDBl6_MfXu6k5ECJYiSxsgkponZJvry.saijaCasu.fJIPWFhSeI7D.7YXpKry0gjDAcTfXJtEYft2RKPvP5u4CyhM9vddDQEMoCSuNtbqayF5iJBSo24GT9CF5wtFitDxSdru80oXK88dMxCgqPXW8zoZkeQDrJsRMZHDv.Sm8T2VBZ8Fax2Za3QNx1cqCb2xFuGCP_wSWJacom2TswIKlNG_6ABRkmgAswXMzLoUnglaQbGRKVjBJArn6BCvXgRl.qAmq0Lhzd.PLEBNyh7nWTtgxjqBUPfbQsVUj7Bl2oO7Df1GQrhezBTTOB4UloUREqbSGwIL3pfR_CvaKsK82WzgrHbIjoDczbyRa04LVP4pEg4p7zrA3Qrj0.95rHqg4HggLv_NCBLzlBc75RvDIscSJK0DHDXCET77X9gThNV_pVK15VAxAA5cRh7N1PAJ3zJwm5wWdt4icDQwzsKeEM3Kdsy6gs6xlax3JAQDd3Hng.px7i10o8.1nHCLXNaoHzaAtp3NmAPeJa4o0gERbONgf3X5tUAg7MfkxhBrbxDb.JMZYooqzul4.wu6M8IcroCmaIAezzB6EqollVLZaLx6KfKAOQtOXURnOtElLESjiBNW2RTld6j4UhP1Z3FUsXsIr.FsdvewVFsce6v_xlTAXYg3McToujkwCqlBfv9YaHE3OMGSzaN64pY6OfoSVJqAsct.57s.SUZINemCDtmrgYu1BScloe7Q.vgu8kNb0k19DVCaDmpCfSQXhZFKM90D7x3vJwEnhyShycTjZh0mqUzUC4zhFvzxQ26ZneKvDV81rksgSxNSQmYziVJ.EWMQynuubVxBGbQpEkXgCmDH_NOZuJlY4pNnuHvU4thF_sP5HXkRCZwqluofdY1gxJS86P1EJt_D4GOJ2.vSL1ppXxrhot25juOztDl42VkA4vByp4p0fYPbifIDdFL830_UBQ8mUAcTTOGG5cWG9imxHCBzfxkQwqe5QAWsOgnR6430lZ9MGjjDFyjVmnNq2bv8ORwcEOfmJeFDqWhVmmk1_xKL2tUDvgeuPAcOsEw5w6TM_ncpeMgE1XBP7nGxtIQqLiPFUHFaYBMZauX12YDjC_w4ci6u6l4LI5uTqEFpi6ztO_.til27vuJvWOtg7HxTIpVAsOFonzm4ZtYsOx_TgRRIzGbXdczsb5c6FGw5eozdlpVLfPvilTEuE1_p5t6Nrdxt5ViRH1RagdVD.V353ZQZMLwKaTiVWKKPJYSPD1fiq8aczkqVUr9KslDXEu2NZUvDyiMpE7qwI51bI2XKMLenXCIUXRqAioWlpuNsubBrLCVpMsJfIyS_.LXhuYT_i3KKDaQnTHIpORKyN5SwNOq22k0pnhN7jVPojmH7VPyJtxX5rLJWI9HgpJMy3jPkYIjXm5N6RmUsXjM3_FVYZtSnCfDo_O5OyVVL7GavRA3FdhHfrDcjB6T0wuSQAQlGQ5IiihYCderJpitgBNXRlSPiXA4ZYWd2At5A6vAtrRnRWYHAU9amazqqV2l5EC1kBRt.MaplSLfPY15FEU4BeclkOovPE8oSgX1K8oFyD0qr_9HCTuQ3ic8JKOLJbDe6bBAm0n7jk7CvfxiZX4EnlBMdQGoxajlKwjNSFtI2HCGK1WZLnvbmKLDlf_Ejq7HYQMTQgQP.F7bCDSQ_5r6YPUuIuucQ3Bw0ikAdnfB.QLWKdGNv0ZqqyxA_kXRBi7rLuy9r.3Gm5vQbrtSMVdoNhvv3BSYZ.COg_NOEWlHwH1VvXyz50njjbnAj8V_cofSH04AeumYXMseRRNWlJTTEZHc8b75eQ_iCFwz10plLS_fFjD7TqA"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=90ff5c381e280837';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\/0362415978?__cf_chl_rt_tk=Sw.qAHPcwEyTtsE_xYA83QjGCPWUycEqUlRG9A1izMA-1739224702-1.0.1.1-WFlTlqdqaMKS893T2HLt2_d6QPf66blBZPEln.5kQY4" + 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