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-3576842910-gov.caltech-edu.pp.ua/post/789643710965

  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-3576842910-gov.caltech-edu.pp.ua",cType: 'managed',cRay: '910004c54cae5a69',cH: 'PmzhkKEP6lilA8gcWI_C_a8nNkOA4P9udROB3IWRI3k-1739231606-1.2.1.1-k7Ah4qEG6.K2VHz_8JzpeYtj5ohJAM3cET858zkKAf78tiAfXavumjqlmZmdTE8V',cUPMDTk: "\/post\/789643710965?__cf_chl_tk=m4QNpX1Q4lQirq9Czz6v_GzOVjBUtVEHXLRKz.4ksJM-1739231606-1.0.1.1-8DEyfSIR2UBGmScpTftHqw.pdLZEDAyGg88XiwIP7b8",cFPWv: 'g',cITimeS: '1739231606',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/post\/789643710965?__cf_chl_f_tk=m4QNpX1Q4lQirq9Czz6v_GzOVjBUtVEHXLRKz.4ksJM-1739231606-1.0.1.1-8DEyfSIR2UBGmScpTftHqw.pdLZEDAyGg88XiwIP7b8",md: "Tzi7b6vWLH_MZI1P9h2.dqR6XXzEgEi3hWMg0WKjhwM-1739231606-1.2.1.1-zUllrbjIXUW5ojY3U.vEEgbIhdIAGAFI2jblys7bwdulAiw6gb6FCI1mOJV6vl.UAvGUfu9RqYytYtn7nWcRocIAtWNibjZmH.IAka1PmdcYbPkfElb50uXATn8UAiXrgDr0196pN_V8VFcTy7ROLhw1.IQNuIfuM5KkU4nKDFSY8IIxbAgLyTZeFjFwmCi8z0ln9qkCXCwK7CgU.byqwDUV52v62_yPx4gt8lqrvcEvAp0OBjkypc6RKJ76baxvxtZoe2F2E38jGYy8Zd0F.u_dpZ7Zv04tfS86NCOwXmH0dSe5.pTpiT26IbWleP4.NBuOfbtrwIu9fDBol804oZxCrviaVAFbFwFl_CLlaWMaSVRIblMPeT61wptross.SvWweyw7McbR.hS5v6FYmecWUxxnnQdhJhEnx2zbPUtOAqMFjobyHMEOzx7H6c0F7PETnc5Hnqvc9sBlGtFELQ8TlZur5p4P1s20Iae_XSUvf_11JjGTBHlK_WcdAX0wTHZT2z1rCGkljQyH3gKHaWiQtDWj8BhUx9e0aZtApl8FFa86WRoND9imZRGdtG.ol2b5YFTOqcLdgeoJBDemt5csUO5GJgF98Fuked52kGiHbb9CUxZgM8rrsrWNG3pFhBHJuEpudZb583wee1_NuaskbSOxClKWri8BGJWfza_aNjolLca0evXo4K0twLAy8LaWo7XlFiiTVsnOQwrgI9jtRlKOX0Sb_SkNa__uF2goxoY5zf0bpw3WfFnEiBrF.NZaJ33JFJPu_Ag8dt1nc_is18QmuKGu1iwCtvsOw6IWybWd5RpRfRqpOoKbDNFJpawfxbx0_u1wqHVdTFKP_Bt3Ai0EIv4Z55QOP4VbE_rM4uZJE0gJpOn2bQMxECBb0KvcUkCwRUevqiYG6QZD6K1Ik7U5s7UjFr5_ua_sFkzz4C.KkJj3nTx0n7CLLv5_vLXUvd89osI20p8NVTjFp7jX9mbKyID1MRrH6q6s1sU9LFANZCyJESMDnSPOxy1Js6SNBueYXjrbCZO95kt.RzYnCIyz1nH9Eql_Zlm2Y7.hasfO3L5WbVeB7gh3BiMmLvyUxS4gWcBRj8mnPXBcWDjaN6AtHHbmhggdqI0inHLPeWJStUiN1Tad9wEdYE0x576dXk2T8bxnFvOTfVW465nqFO1mre5wL2OxnJLuQ0jJl29N5P3AI.VjKJcZtrDuCeOZmcia39s87ShuUKxQGRZIo1YacNF2PG8uxiP54.y2WhE_hVRDv5cmx9huAR3JQxRoleSaDTqDP0ZBOtwMNvSsy7ve6PTh7YgC39hN3DCPZ.YBVwWmHtsShJyH40cuhzdKU5fcxOsI92F.GvO.OZFhPG3YxqkqS59Cl_2Oegh0cXmH15R2414xKbOW7Mqma8JufFj.QINGEsUxwePM2rZ_GMmAOg25YR5.1HuoB46UaJB_Ikczmpmff9jCL.oGa3kv5vIpqZ8fahUvr2mM7o3gCdfT_ymxPft8yRvlTRuWBO0uyM1HGBK6Vq2sRwMiSwooZS7Oe55iR0TdYo.GrsdM8vaXb.oPB6hDLy6QSTiqXOeaK.xzvRnESBBMJ._aHKu9L7iFb6aqcob1aErxkvs0nJZ3k8NEH3Lvki35I1PvQpLJjdOW0hDZ2sz8ZAAjbh.5JtTcC5npm5IdfTO06pk0V4CO5X49ClIK5Wz8szlqQeCNOFm4xgYe29Gd7I5Nj_FnFjLLHQoKEmRQkVnZ2i3nbchzhtPItAkVb0SvT1zoP5eBjvtJzQXmNDsWf7z0KqVWcmRypABckDxrG2MiOkHlS5VwJ4UUfIxwWRqOVYLQOgXZRF8IC5jTrU.DLO4CP5jxYxt5nnVl317zO8x81t6LuNE7tz1Z7ETPnDdMAB8W3gPbdlgu7HviZGCrIvumsvBs3yq94upHzfazZQEwlbn4h1Ra4jkRQz9J8210UGq6QYhC_W8awO8587UcrwhFcEw2kNmmH00h_ALvK3y6VwCkbIrYLxvrII09jl5vfyb36bRegusyMNpi.BJzCq6cuhsvmqfL11nMhQD.Ivps7RMXAURj6v1PtuPoBqmPevZ_DKVdLjt4aZUDK4XWxo.CqCTK8Aon33DAQrBFKoFmYrZ2S4rAEio8DGefdxsihvdQVWkW1btNdrtKvsbyZ6_TPp8weje4oWklYpofKvcGjAnQg36BovLRMaLrbnYgZGQs1dUEigwncH.ES_gLZsOD5uBJLo1xBfW_uUTX1iXt.g",mdrd: "9ftGjGWigQGlC6wM6mkzeumlcPL2DT3jp.xgFdQs9Mg-1739231606-1.2.1.1-0ja51jwZdrcGxAT66ieKqodidvEBKYIJTH7aCArKv4h3INQ3i6rKBA1.A8a.Ngy2u_GbZka.Gf9Nj6NPNDMTES5uaWkIzi6577lQ3T23ZGg7yWEoaiBSC6L2IrUDIcXcXh8t4v7gifWxlld2fWvl55vN4.B28mFIoPvguw.vu3jdgEz_VpVfq7CNtFTynaTiszXOVXYiWe2TMJw5_Z.xtl0f7DJfLAaBYMGQlktSOJU3y6Tvk_BDc6gLnzvjI.GU9OK2_X2oz3YP9lSXtPyiS2hE7NMckjlNYL3R74TtyJbOZ5H6fROCdgOzDSHlSxwb7oPXGmXkcA4s83bBtIuQPBH_A0baEHeyIIH7D_51LnEhIu0JgjMCkRw1vPuxX5Ug18FmbCA1XyLxvk96Rmpnh9.bmn7vow3ALWuAxDXLrCzaUMLkXnN_fr0y9AWMex3B3Xi_mn52WKFsDWb1vgQdySHBwWkme9TRmGYGmyDnZ_q1wcB6j7ZFa18y75HHMiOhO1LDmIv7FRQfPTFl.sNFXHL2cOEweqHmN5i8bsajQ6s3QmcWxIT4yn9p7gp5autuo3VD0OaaLGr30xwh89Jr2hzMNCbPc5Lu5qkaxf9SZW_jUnPowEVHSiNzs1hhQudqsE42MtrRFjbBOzK3m8eKX0RoPLzYRcaBEbad7irEYZ3D.bRrH_bayucgVRhtwJhHh2ooJGdr44wYowh5L5PKiXAtEIdEnRg202zsozjISJYgTOxU84rpmsmBkyZHSccoko7GzvT23qQOuQhh2epe21XqdtqUBFB32ACl8JSI0N3qW_iKC0BE8cvygQSddkwyGHh0jPnTq4rpFwNk21KgJ88TB3k1r7_quDdi_wBFd76EFntf_ZciaAAlw9RC6eVIrqP0jwKT2SZpKa_LrnzOt_B6LGMSdXJ3YJD83MY30jLs6pOrV6QhAgDYlr61jUk2cZXZy6RQoCl9gEmHBELo4DphHU8aUKYwQJ_e9xzrYV5tWO9KcepwMdXZ.nSiraZOF9ed8vFjj3RO0ZVSWBndmRy34309jalxAC6c.b6R2c6wRw2IinRy_oZazND53nrDw9nB4s.qVMchP3FrMVcy7I9dNhkgN3PfND1jl_DyRvG7wieyd9FR561BYZDY.K3fPjwh4AO_5T.BIguATs407ePm8JYR6g4dqRLGsLHn9emhU.92.z39dCO91k9iZWic3JDD74Xe.q9nksrDEIduxI5IKzUtHJBoyRi27lyIRkj7BITL6GftFCjeSxcN6RkkgJ8XSD7ACcp_U0yuoRjuRFf6F6EBxac56J7ZHvyvkqYMcRCcWBluyeeOwE0q9rySaGNkCdMpxeay3GJEqRhF3EV6y10vffE8FGqIxR0dHTgC6U6u.wsa8ESuQvma023z7HpCDDvgIHmSGadfIJ66iGOzjY2PqBCLwPG8TPoWM99wXC.yzx23APqm8Qilx0e2UfqBtkIz28ADl.Xdbxsf9YfL1_fmJNBloC4t9iYTCcA0HTzeyigpZZ5lcSQXoMR1UfL_mUFna_pctj6Bz2tq8nNs.8OFDhzPVjgcOmzf.ZPEl4fMpxIOlCbaqky4BizxoX5A7yraWGWDcBlqJoJ8Hbqn8R9X36AMQT2x296B3OfCMc1iMDx.oGgtx8Yd4i58OQ2U9tKGv1wXjAzSMRVocDkSeeTPF0c55e0QiO96OboT.718.W9lfjuEV4w6NVUOFMpVgzBCKEesZqWIzTIMzQyeljQ0Sov0gMCZogPBiuk0IaPkFkwwZGIzy9k7wBKadYjJvKe3ZYTm2Hfj4aLOE1fHwtv83qu7OPfmFiAtP0Hv_GtUjMVcb4BpDYt6GSdv"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=910004c54cae5a69';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\/789643710965?__cf_chl_rt_tk=m4QNpX1Q4lQirq9Czz6v_GzOVjBUtVEHXLRKz.4ksJM-1739231606-1.0.1.1-8DEyfSIR2UBGmScpTftHqw.pdLZEDAyGg88XiwIP7b8" + 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